Journal articles: 'Metal contamination'

1

Samanta, S., V. Kumar, S. K. Nag, K. Saha, Sajina A.M., S. Bhowmick, S. K. Paul, and B. K. Das. "Assessment of heavy metal contaminations in water and sediment of River Godavari, India." Aquatic Ecosystem Health & Management 24, no. 4 (October 1, 2021): 23–33. http://dx.doi.org/10.14321/aehm.024.04.05.

Full text

Abstract:

Abstract The Godavari is the largest river of peninsular India and receives a significant quantity of pollutants from diverse sources, including many industries, urban developments and agricultural fields. Such pollution is more prominent in the upper stretch of the river. This work aimed to assess the water and sediment contaminations of River Godavari for the presence of trace metals Cd, Cr, Cu, Mn, Pb and Zn. Samples were collected from 10 sampling stations covering the entire stretch of the river. Sediment pollution characteristics and potential ecological risks were evaluated by calculating contamination factor, degree of contamination, pollution load index, geo-accumulation, and the potential ecological risk index. Pearson's correlation analysis and principal component analysis were used to predict the probable sources of heavy metals. The concentrations of studied heavy metals in water were mostly observed below the detection limit using the flame mode of an Atomic Absorption Spectroscope and recorded safe for the biotic community. The mean concentrations of metals in the sediments were calculated and also recorded to be safe with respect to the guideline values of the United States Environmental Protection Agency (USEPA, 1999). However, the sampling site-specific calculated contamination factors indicated moderate contamination of some of the stretches as: S1 for the presence of Cu, Mn, Zn; S2 for Cu, Zn; S3 and S4 for Cu; S5 for the dominance of Mn. The rest of the sites were free from sediment metal contaminations. The degree of contamination values specified S2 as moderately contaminated. Pollution load index indicated sites S1 and S2 as contaminated. Both geo-accumulation and potential ecological risk index designated lower levels of pollution in the river owing to sediment metal contaminations. Furthermore, a comparison of the heavy metal concentrations with sediment quality guidelines signified that the heavy metal pollutions (Cu, Cr, Mn and Zn) tend to pose occasional harmful effects on the ecosystem. From Pearson's correlation analysis and principal component analysis, two main sources of metal pollution were predicted. The Cu, Cr and Zn contaminants were mainly derived from human activities and Mn from natural sources as well as human activities.

APA, Harvard, Vancouver, ISO, and other styles

2

Thambavani, Dr D. Sarala, and V. Prathipa V. Prathipa. "Heavy metal contamination in Plants and Soils." International Journal of Scientific Research 2, no. 8 (June 1, 2012): 59–65. http://dx.doi.org/10.15373/22778179/aug2013/20.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Yves, Gnagne Agnes Essoh Jean Eudes, Yapo Ossey Bernard, Ohou-Yao Marie Jeanne, Ladji Meite, Ballet Tiama Guy Nicaise, and Mambo Veronique. "Trace Metals Content Of The Sewage From The Sewer Network Of Abidjan (Côte d’Ivoire)." European Scientific Journal, ESJ 12, no. 11 (April 27, 2016): 412. http://dx.doi.org/10.19044/esj.2016.v12n11p412.

Full text

Abstract:

Many studies have incriminated the effluents of the sewer network of Abidjan as major trace metal contamination sources in the Ebrié Lagoon. However, no data are available on wastewater regarding trace metal contaminations in Cote d’Ivoire. Thus, this study aimed at assessing the level of contamination of wastewater by metals copper, iron, cadmium, lead and Zinc. To achieve this objective, six campaigns were carried out from december 2013 to november 2014 in eight specific sites. The samples were analyzed using an atomic absorption spectrophotometer AA20 Varian, after mineralization. The results showed a significant contamination of effluents from the sewer network. The order of metals concentrations was Fe >Zn > Cu> Pb>Cd. Total metal concentrations (μg/L) ranged from 313.4 to 881.5 for Fe, 144 to 240 for Zn, 132 to 318 for Cu, 10 to 30 for Cd and 114.3 to 263 for Pb. Among these values only Cd concentrations considerably exceeded WHO guideline value (10 μg/L).

APA, Harvard, Vancouver, ISO, and other styles

4

Olatunde, K. A., T. Towolawi, I. Kolawole, N. Aiyelabola, O. Michael, E. Warrie, O. Oludiran, and I. Awomade. "Soil quality and metal distribution around stone quarries within Abeokuta, Southwest, Nigeria." Ife Journal of Science 23, no. 2 (November 17, 2021): 53–61. http://dx.doi.org/10.4314/ijs.v23i2.6.

Full text

Abstract:

Quarrying activities are explored to extract a variety of materials deposited underneath the earth surface. These activities however can potentially impact negatively on soil quality and cause elemental pollution. This study assessed soil quality and distribution of metals in soils around four quarrying sites (PAPA, S&D, TCity and Mile 8) within Abeokuta, Ogun State, Nigeria. Thirty six topsoil samples were collected at distances from quarry gates in September 2019 and analyzed using standard methods. Soil quality and metal concentrations were compared with reference and standards and the degrees of soil contamination assessed using relevant indices. Soil quality reduced with distance from the quarry gates. Similarly, metal concentrations had strong and significant (P=0.05) negative relationships with distance and were higher in soil samples compared to the reference. Moderate contaminations for all metals were observed in soils collected close to the quarry gates soils from the results of the contamination factor index (Cf). However, the results of ecological risk index (Ei) showed that the metal loads in soils currently do not pose any ecological risk. Keywords: Quarry, Soil quality, Metal distribution, Soil contamination, Potential ecological risk

APA, Harvard, Vancouver, ISO, and other styles

5

Waseem, Amir, Jahanzaib Arshad, Farhat Iqbal, Ashif Sajjad, Zahid Mehmood, and Ghulam Murtaza. "Pollution Status of Pakistan: A Retrospective Review on Heavy Metal Contamination of Water, Soil, and Vegetables." BioMed Research International 2014 (2014): 1–29. http://dx.doi.org/10.1155/2014/813206.

Full text

Abstract:

Trace heavy metals, such as arsenic, cadmium, lead, chromium, nickel, and mercury, are important environmental pollutants, particularly in areas with high anthropogenic pressure. In addition to these metals, copper, manganese, iron, and zinc are also important trace micronutrients. The presence of trace heavy metals in the atmosphere, soil, and water can cause serious problems to all organisms, and the ubiquitous bioavailability of these heavy metal can result in bioaccumulation in the food chain which especially can be highly dangerous to human health. This study reviews the heavy metal contamination in several areas of Pakistan over the past few years, particularly to assess the heavy metal contamination in water (ground water, surface water, and waste water), soil, sediments, particulate matter, and vegetables. The listed contaminations affect the drinking water quality, ecological environment, and food chain. Moreover, the toxicity induced by contaminated water, soil, and vegetables poses serious threat to human health.

APA, Harvard, Vancouver, ISO, and other styles

6

Ridho Asra, Rusdi, Robi Budi Yandra, and Nessa. "Determination of Heavy Metal Contaminations of Lead and Cadmium in Selected Lipstick Products Sold in Padang City Using Atomic Absorption Spectrophotometry." Indonesian Journal of Pharmaceutical and Clinical Research 2, no. 1 (May 7, 2019): 13–18. http://dx.doi.org/10.32734/idjpcr.v2i1.743.

Full text

Abstract:

The study was aimed at assessing the levels of some toxic metals of lead and cadmium in selected lipstick products sold in Padang city. Four brands of lipsticks were taken which were BL, NK, PS and WD. The lipsticks were grinded and analyzed for heavy metals (lead and cadmium) using atomic absorption spectrophotometry. Each sample was destructed by nitric acid and perchloric acid (3:1). Destructed samples were added with sodium hydroxide to liberate ammonia and filtered into a 25 mL volumetric flask. The concentrations of heavy metal were measured by using atomic absorption spectrophotometry. The results showed that lead heavy metal contamination was not detected. Whereas, the heavy metal contamination of cadmium in lipstick brands BL, NK, PS and WD were 0.2287, 0.2000, 0.1796 and 0.1220 mg/kg, respectively. The study results showed that all metal contaminations of lead and cadmium were not over the limit which were regulated by National Agency of Drug and Food Control of the Republic of Indonesia.

APA, Harvard, Vancouver, ISO, and other styles

7

Liu, Shi, and Bin Liu. "Characterization of Surface Metal Contaminations on Fused Quartz." Solid State Phenomena 195 (December 2012): 277–79. http://dx.doi.org/10.4028/www.scientific.net/ssp.195.277.

Full text

Abstract:

Micro-contamination exerts ever-increasing adverse impact on semiconductor manufacturing as device integration scale keeps increasing and device geometry continues decreasing. In particular, contaminations from particles, trace metals, and/or organic compounds can reduce device yield, quality, and reliability [. Metallic impurities from materials used for process equipment are one of the major contamination sources.

APA, Harvard, Vancouver, ISO, and other styles

8

Wang, Jing Yi, Jiang Xue Long, and Hong Wei Lu. "Heavy Metal Contamination of Soil in Zhuzhou Smelting." Advanced Materials Research 926-930 (May 2014): 4246–49. http://dx.doi.org/10.4028/www.scientific.net/amr.926-930.4246.

Full text

Abstract:

To date, environmental issues become increasingly prominent, especially heavy metal (Pb and Zn) pollution of soil. This paper describes the procedure of detecting heavy metal content in soil from Zhuzhou Smelting in order to understand the contamination degree of heavy metals. An extensive soil survey was conducted in the plant include lead and zinc major production areas. Microwave digestion and ICP-AES technology were used to test metal content in soil. The results revealed that the soil in the area had been polluted by Pb and Zn, however, the pollution degree of each type of metals was not identical. In general, the Smelting was slightly polluted by heavy metals, with the highest concentration being in the Zinc sulfide plant. The heavy metal content in deep soil was a little bit higher than surface except for the Zinc sulfide plant. The reason may related to its particular location.

APA, Harvard, Vancouver, ISO, and other styles

9

Dewi, Triyani, Edhi Martono, Eko Hanudin, and Rika Harini. "Status of soil heavy metals contamination using contamination indices in shallot fields." E3S Web of Conferences 306 (2021): 04013. http://dx.doi.org/10.1051/e3sconf/202130604013.

Full text

Abstract:

Monitoring and assessment of heavy metal concentrations in shallot fields are needed to evaluate the potential risk of contamination due to heavy metals. This study aims to define the status of heavy metal contamination in shallot fields using contamination indices. A total of 184 soil samples (0-20 cm) were taken from shallot fields in Brebes Regency, Central Java. The soil samples were analyzed for the concentration of five heavy metals (Cd, Pb, Ni, Cr, and Co) with HNO3 and HClO4 extracts and measured using AAS. Assessment of the status of heavy metals contamination in the soil using contaminant factor (CF), geo-accumulation index (I-geo), and pollution load index (PLI). The mean concentration in shallot fields showed the following order Cr > Ni > Pb > Co > Cd and the concentration were still below critical limit values. Four metals are Pb, Cr, Co, and Ni are low contamination (CF<1), while Cd is considerable until very high contamination factor. Based on I-geo values, shallot fields are practically uncontaminated of Pb, Co, Ni, and Cr (I-geo<1), meanwhile the status of Cd is uncontaminated to moderately contaminated (0<I-geo<1). Generally, the shallot fields in Brebes Regency, Central Java is unpolluted with five metals (PLI<1).

APA, Harvard, Vancouver, ISO, and other styles

10

Su, Hui, Zhang Cai, and Qi Xing Zhou. "Phytoremediation of Cadmium Contaminated Soils: Advances and Researching Prospects." Materials Science Forum 743-744 (January 2013): 732–44. http://dx.doi.org/10.4028/www.scientific.net/msf.743-744.732.

Full text

Abstract:

More and more attention has been paid to soil contamination by heavy metals in recent years. Heavy metal contamination includes heavy metal - heavy metal contamination, heavy metal - organic contamination, and heavy metal nutrient contamination. In particular, soil contamination by cadmium (Cd) is the most typical one. In terms of the current remediation technologies, phytoremediation of Cd contaminated soil remains popular due to its low cost, environmental aesthetics and in-situ effective treatment. Therefore, screening-out and identification of Cd hyperaccumulators becomes a hotspot in this researching domain. In order to further improve the efficiency of phytoremediation, we have developed a variety of joint remediation technologies. Based on these work at home and abroad, we summed up the studying progress in this field. Some main researching contents and directions of phytoremediation for Cd contaminated soils were also proposed.

APA, Harvard, Vancouver, ISO, and other styles

11

Sibuar, Agatha Anak, Nur Syahirah Zulkafflee, Jinap Selamat, Mohd Razi Ismail, Soo Yee Lee, and Ahmad Faizal Abdull Razis. "Quantitative Analysis and Human Health Risk Assessment of Heavy Metals in Paddy Plants Collected from Perak, Malaysia." International Journal of Environmental Research and Public Health 19, no. 2 (January 10, 2022): 731. http://dx.doi.org/10.3390/ijerph19020731.

Full text

Abstract:

Rice is one of the major crops as well as the staple food in Malaysia. However, historical mining activity has raised a concern regarding heavy metal contamination in paddy plants, especially in Perak, a state with major tin mining during the late nineteenth century. Therefore, the objective of this study is to investigate the heavy metals (As, Cd, Pb, Cu, Cr) contamination in paddy soils and paddy plants in three districts in Perak. The content of heavy metals was determined using ICP-MS, while the absorption and transferability of heavy metals in the paddy plants were investigated through enrichment (EF) and translocation (TF) factors. Principal component analysis (PCA) was employed to recognize the pattern of heavy metal contaminations in different sampling areas. Health risk assessment was performed through calculation of various indices. The quantification results showed that root contained highest concentration of the studied heavy metals, with As exhibiting the highest concentration. The EF results revealed the accumulation of As, Cu, and Cr in the rice grains while PCA showed the different compositional pattern in the different sampling areas. The health risk assessment disclosed both noncarcinogenic and carcinogenic risks in the local adults and children. Overall, findings from this study show that heavy metal contamination poses potential health risks to the residents and control measure is required.

APA, Harvard, Vancouver, ISO, and other styles

12

Khalid Farooq, Akbar, Hale Wiliam HG, and Athar Alistair D Headley and Mohammad. "Heavy Metal Contamination of Roadside Soils of Northern England." Soil and Water Research 1, No. 4 (January 7, 2013): 158–63. http://dx.doi.org/10.17221/6517-swr.

Full text

Abstract:

Environmental pollution of heavy metals from automobiles has attained much attention in the recent past. The present research was conducted to study heavy metal contamination in roadside soils of northern England. Roadside soil samples were collected from 35 sites in some counties of northern England and analysed for four heavy metals (cadmium, copper, lead, zinc). Their concentrations and distributions in different road verge zones (border, verge, slope, ditch) were determined. Lead concentration was the highest in the soil and ranged from 25.0 to 1198.0 μg/g (mean, 232.7 μg/g). Zinc concentration ranged from 56.7 to 480.0 μg/g (mean, 174.6 μg/g) and copper concentration ranged from 15.5 to 240.0 μg/g (mean, 87.3 μg/g). Cadmium concentration was the lowest in the soil and varied from 0.3 to 3.8 μg/g (mean, 1.4 μg/g). Though the levels of heavy metals in roadside soils were higher as compared to their natural background levels in British soils, their concentrations in general, however, were below the ‘critical trigger concentrations’ for the contaminated soils. All the four heavy metals exhibited a significant decrease in the roadside soils with the increasing distance from the road. The border zone had the highest mean concentration of the four metals whereas the ditch zone exhibited the lowest mean concentration.

APA, Harvard, Vancouver, ISO, and other styles

13

Statescu, Florian, and Dorin Cotiusca-Zauca. "HEAVY METAL SOIL CONTAMINATION." Environmental Engineering and Management Journal 5, no. 5 (2006): 1205–13. http://dx.doi.org/10.30638/eemj.2006.098.

Full text

APA, Harvard, Vancouver, ISO, and other styles

14

Lovley, Derek R., and John D. Coates. "Bioremediation of metal contamination." Current Opinion in Biotechnology 8, no. 3 (June 1997): 285–89. http://dx.doi.org/10.1016/s0958-1669(97)80005-5.

Full text

APA, Harvard, Vancouver, ISO, and other styles

15

Morgan, Hilary. "Metal contamination at shipham." Science of The Total Environment 75, no. 1 (August 1988): 11–20. http://dx.doi.org/10.1016/0048-9697(88)90157-x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

16

Oltersdorf, Antje, Anamaria Moldovan, Michael Bayer, Martin Zimmer, and Jochen Rentsch. "Surface Contamination of Silicon Wafer after Acidic Texturisation." Solid State Phenomena 187 (April 2012): 337–40. http://dx.doi.org/10.4028/www.scientific.net/ssp.187.337.

Full text

Abstract:

The acidic texture bath that is commonly used in crystalline silicon solar cell manufacturing is a mixture of HF/HNO3/H2O [. While the influences of metal contamination on silicon wafer surfaces as well as several cleaning methods were intensively investigated in the previous 30 years [ the effect of metal contaminations in texturisation baths has not yet been studied intensively. There are two categories of contaminations:

APA, Harvard, Vancouver, ISO, and other styles

17

Chandorkar, Suneeta, Priyanka Bajaj, and Prachi Deota. "Is Metal Contamination A Health Risk In Study Subjects From Urban Vadodara?" Current World Environment 10, no. 1 (April 30, 2015): 143–48. http://dx.doi.org/10.12944/cwe.10.1.16.

Full text

Abstract:

Metal contamination of food is a major food safety concern emerging at global as well as national level. Air, water and soil are the major routes through which metals enter the food chain. Gujarat being the second most industrialized state of India and Vadodara having the highest number of chemical factories in Gujarat is at a higher risk of metal toxicity. Research has also been done to analyze metal contamination of raw food hence in the present study investigations were done on metal contamination of total diets. The objective was to analyze each meal of the day and water sample of the subjects for metal content by duplicate diet method. Duplicate diets, which included separate food samples for each food groups and drinking water were collected from sixty subjects from free living population of Vadodara. Food samples were digested using wet digestion method. In all 250 foods and 24 water samples were analyzed for metals namely, Aluminum, Arsenic, Cadmium, Mercury, Nickel and Lead using ICP-MS. Amongst all food groups pulse based product had highest contamination of Aluminum, Cadmium and Lead. Nickel contamination was highest in eggs. Arsenic contamination was highest in other items. Maximum Aluminum, Arsenic and Nickel in diets were contributed from cereals whereas maximum Lead and Cadmium was contributed from pulses in the diets. Aluminum, Lead, Cadmium and Nickel were in higher amounts in foods compared to their cutoffs. There is therefore an urgent need to look into possible factors for the high presence of metals in food and take remedial measures to reduce metal contamination.

APA, Harvard, Vancouver, ISO, and other styles

18

Yadav, Arti, and Pawan Kumar Yadav. "Pollution Load Index (PLI) of field irrigated with wastewater of Mawaiya Drain in Naini suburbs of Allahabad District." Current World Environment 13, no. 1 (April 20, 2018): 159–64. http://dx.doi.org/10.12944/cwe.13.1.15.

Full text

Abstract:

Wastewater irrigation is practiced in outskirts of several cities of India. Enhanced growth and productivity of crops possess threat of heavy metal accumulation while irrigated with wastewater. Assessment of heavy metal accumulation in soil flooded with wastewater of Mawaiya drain in Naini region of Allahabad district, using parameter of contamination factor and pollution load index (PLI). Samples of soil were taken from the fields irrigated with wastewater and analyzed for heavy metals by using Atomic Absorption Spectroscopy (AAS). The maximum accumulation of heavy metal was observed for iron in soil. Heavy metal contamination is soil was assessed by estimation of contamination factor which was observed for Cu (0.7858), Fe (296.1864), Zn (0.4304), Pb (1.1661) and Ni (1.8912). Pollution load index (PLI) used for assessment of soil contamination and observed that maximum contamination (PLI, 74.31) was in water stressed conditions of summer. Heavy metals concentration in wastewater and accumulation in soil found within WHO limits in present study which may increase if unmanaged wastewater flooding continued.

APA, Harvard, Vancouver, ISO, and other styles

19

Khushbu, Rachna Gulati, Sushma, Amit Kour, and Pankaj Sharma. "Ecological impact of heavy metals on aquatic environment with reference to fish and human health." Journal of Applied and Natural Science 14, no. 4 (December 19, 2022): 1471–84. http://dx.doi.org/10.31018/jans.v14i4.3900.

Full text

Abstract:

Heavy metals have a high density that is harmful even in low quantity. These metals enter aquatic habitats through various sources, home effluents, including industrial waste, atmospheric sources, and other metal-based businesses, as well as E-Waste. Heavy metal pollution is responsible for degenerating aquatic species, creating physical abnormalities in creatures and contaminating the aquatic environment. These poisonous heavy metals cause a variety of fish ailments like decrease in hatching rate, teratogenesis and bioaccumulation in the tissues etc. The contamination of heavy metals in aquatic bodies and ecosystems has a significant influence on the food chain. Because fish people consume fish, it has an indirect impact on their health. These heavy metals also have a higher impact on the environment because they remain for longer periods and have bio-accumulative capabilities, leading water health to deteriorate. This study offers insight into the disruption of fish and human physiology, their reproductive ability by heavy metals. This review provides baseline data on the heavy metals and aquatic environment, especially fish and human health. The data will increase sensitivity to preventing and managing aquatic environmental pollution, particularly heavy metal contamination.

APA, Harvard, Vancouver, ISO, and other styles

20

Wei, Jing, Xiaogang Zheng, Jintong Liu, Guowei Zhang, Yanxi Zhang, Cailing Wang, and Yuanchen Liu. "The Levels, Sources, and Spatial Distribution of Heavy Metals in Soils from the Drinking Water Sources of Beijing, China." Sustainability 13, no. 7 (March 26, 2021): 3719. http://dx.doi.org/10.3390/su13073719.

Full text

Abstract:

Our study area is the upstream watershed of the Guanting and Miyun Reservoirs; together, these two reservoirs comprise the main drinking water source of Beijing, China. In order to prevent crop contamination and preserve the quality of the water and soil, it is important to investigate the spatial distribution and the sources of the heavy metals in farmland soils on the watershed scale. For this study, we collected 23,851 farmland surface soil samples. Based on our analysis of the concentrations of eight heavy metals in these samples, we found that the overall soil quality in our study area is excellent, but that the Cd, Cu, Zn, and Cr contamination risks are relatively high. Moreover, a percentage of samples exceeded the Cd (1.54%,), Cu (0.28%), Zn (0.25%), Cr (0.13%), Pb (0.09%), As (0.05%), Ni (0.04%), and Hg (0.02%) risk screening values for soil contamination in agricultural land. In addition to determining the spatial distribution characteristics of the heavy metal concentrations of the soil samples, we also conducted a factor analysis and an R cluster analysis (CA) whcih can gathered the similar variables to track the sources of the heavy metals. We found that the Cd, Pb, and Zn are likely sourced from a quartz syenite porphyry body and from coal-fired enterprises, while the Cr, Cu, and Ni contaminations are mainly caused by runoff from iron ore smelting. Additionally, agricultural production contributes to the local accumulation of Cu, and industrial (smelting) discharge is partially responsible for the As contamination. As a result of the atmospheric deposition of pollutants, areas with high Hg concentrations are generally centered on large- and medium-sized cities. Due to these high natural heavy metal background values, the existing and future heavy metal contamination in the watershed poses a serious ecological risk to both the soil and the surface water.

APA, Harvard, Vancouver, ISO, and other styles

21

Mwakisunga, Benard, Harishchandra B. Pratap, John F. Machiwa, and Flora Stephano. "Heavy Metal Contamination and Potential Ecological Risks in Surface Sediments along Dar es Salaam Harbour Channel." Tanzania Journal of Science 47, no. 5 (December 1, 2021): 1606–21. http://dx.doi.org/10.4314/tjs.v47i5.11.

Full text

Abstract:

Investigation of heavy metal contamination along Dar es Salaam harbour channel was carried out in order to determine their current concentrations, sources and potential ecological risks to benthic biota. Sampling was carried out from January to May 2019 and samples analysed using ICP-OES and C-H-N-S analyser. Analysis of heavy metal relationships showed that, Cu, Zn, Cr, As, Ni, Co, Fe, Cd had strong relationships with each other, while Pb only related to Zn. Principal component analysis partitioned metals into two groups; PC1: Ni, Cr, Fe, Co, As, Cu, Cd, and Zn explaining 73.6% variance and PC2: Pb, Zn, and Cd with 13.7% variance. Similarly, Cd, Pb and Zn had severe to very high enrichments (Cd > Pb > Zn) showing serious anthropogenic contamination of these metals in sediments along Dar es Salaam harbour channel. Degree of contamination and potential ecological risks varied from low, moderate, to high; indicating that sediments were considerably contaminated with heavy metals. Levels of contamination varied in space and according to the type of heavy metal Higher contamination and ecological risks were revealed at the harbour area probably due to the observed high concentrations of Cd, Pb and Zn. Monitoring of metals should be emphasized in order to control contaminants release into this area from their sources. Keywords: Dar es Salaam harbour channel, Heavy metals, Contamination, Sediments, Degree of contamination, Ecological risks

APA, Harvard, Vancouver, ISO, and other styles

22

Zakaria, Zuliana, Nur Syahirah Zulkafflee, Nurul Adillah Mohd Redzuan, Jinap Selamat, Mohd Razi Ismail, Sarva Mangala Praveena, Gergely Tóth, and Ahmad Faizal Abdull Razis. "Understanding Potential Heavy Metal Contamination, Absorption, Translocation and Accumulation in Rice and Human Health Risks." Plants 10, no. 6 (May 26, 2021): 1070. http://dx.doi.org/10.3390/plants10061070.

Full text

Abstract:

Rice is a worldwide staple food and heavy metal contamination is often reported in rice production. Heavy metal can originate from natural sources or be present through anthropogenic contamination. Therefore, this review summarizes the current status of heavy metal contamination in paddy soil and plants, highlighting the mechanism of uptake, bioaccumulation, and health risk assessment. A scoping search employing Google Scholar, Science Direct, Research Gate, Scopus, and Wiley Online was carried out to build up the review using the following keywords: heavy metals, absorption, translocation, accumulation, uptake, biotransformation, rice, and human risk with no restrictions being placed on the year of study. Cadmium (Cd), arsenic (As), and lead (Pb) have been identified as the most prevalent metals in rice cultivation. Mining and irrigation activities are primary sources, but chemical fertilizer and pesticide usage also contribute to heavy metal contamination of paddy soil worldwide. Further to their adverse effect on the paddy ecosystem by reducing the soil fertility and grain yield, heavy metal contamination represents a risk to human health. An in-depth discussion is further offered on health risk assessments by quantitative measurement to identify potential risk towards heavy metal exposure via rice consumption, which consisted of in vitro digestion models through a vital ingestion portion of rice.

APA, Harvard, Vancouver, ISO, and other styles

23

Czikkely, Marton, and Csaba Fogarassy. "Urban Wastewater Management in Focus of Heavy Metal Contamination." YBL Journal of Built Environment 6, no. 1 (September 1, 2018): 103–13. http://dx.doi.org/10.2478/jbe-2018-0007.

Full text

Abstract:

Abstract In our study, we focused on urban wastewater management, with special regard to the problems caused by heavy metal contaminations. Heavy metals function at low concentrations as a biogenic element, but at the same time in higher amounts (especially above the limit value) are considered as pollutants. We determined the basic wastewater treatment problem: which is the main problem of heavy metal contaminated urban wastewaters and how could eliminate heavy metals. We focused on wastewater origin heavy metal mobility in environment and effect (risk) on human health. In the following, we undertook to analyse urban wastewater in this direction.

APA, Harvard, Vancouver, ISO, and other styles

24

Fonseca, Rita, Catarina Pinho, Teresa Albuquerque, and Joana Araújo. "Environmental Factors and Metal Mobilisation in Alluvial Sediments—Minas Gerais, Brazil." Geosciences 11, no. 3 (March 1, 2021): 110. http://dx.doi.org/10.3390/geosciences11030110.

Full text

Abstract:

In areas contaminated by potentially toxic elements (PTEs), knowledge of processes of metal mobilisation is the basis for the choice of appropriate remediation methodologies. The mobilisation of metals is a function of several factors, and the response to these factors must be well known during the planning of remediation strategies. The activity of an ore metallurgical plant in South-East Brazil resulted in major contamination by several heavy metals. Reversing the contamination’s negative impact required geochemical assessment of the area, including the physicochemical characterisation, quantification, and delimitation of PTEs, and the rating of the solubilisation/mobilisation capacity of these elements. The definition of spatial patterns for PTEs’ distribution allowed the construction of contamination risk maps which work as a tool for the mitigation and control of the contamination plume. The chemical analysis of interstitial water and selective and sequential extraction methodologies showed that elements that occur in the environment in critical concentrations (Zn, Cd, Pb, As) are mostly associated with easily mobilised forms (soluble, exchangeable cations, associated with Mn oxides). Given the great mobility of the contamination plume, any process of removal of contaminated material becomes unfeasible, thus the strategy of remediation for the stream and associated alluvial deposits must be based on methods of in situ decontamination.

APA, Harvard, Vancouver, ISO, and other styles

25

Shaik, Laharshitha Kajol. "A Review of Heavy Metal Toxicity, Effects and Methods for Estimating Heavy Metal Concentration in Water." International Journal for Research in Applied Science and Engineering Technology 9, no. VI (July 15, 2021): 612–15. http://dx.doi.org/10.22214/ijraset.2021.36370.

Full text

Abstract:

Heavy metals are metal ions which acts as carcinogens and causes serious health issues as they produce free radicals and these free radicals cause damage to DNA which eventually leads to cancer. They are non-degradable in nature and responsible for contamination of various natural resources in environment mainly water contamination has become a major problem. Many metal ions such as cadmium, lead, arsenic, mercury are considered as toxic metals. The analysis of these metal ions is necessary and to detect these metal ions, several detection methods such as electrochemical biosensors, CNT’s, silver nanoparticles have been developed. In this paper, the toxicity and health effects of several heavy metals and their role in causing of oxidative stress have been summarized. Also, various heavy metal detection methods have been listed.

APA, Harvard, Vancouver, ISO, and other styles

26

Ubrihien, Rodney P., Anne M. Taylor, and William A. Maher. "Bioaccumulation, oxidative stress and cellular damage in the intertidal gastropod Bembicium nanum exposed to a metal contamination gradient." Marine and Freshwater Research 68, no. 5 (2017): 922. http://dx.doi.org/10.1071/mf16026.

Full text

Abstract:

The high concentration of population and industry in coastal areas leads to contamination. In situ biomonitors provide a reliable and cost-effective means of assessing the effects of contamination. Rigorous assessment of biomonitors is required to establish links between biomarker measurements and contamination in the environment. The aims of the present study were to assess the effects of metal contamination on the intertidal gastropod Bembicium nanum and to validate biomarkers for use in this species. B. nanum was sampled from a metal contamination gradient emanating from Port Kembla (NSW, Australia). Tissue metal concentrations were related to the condition of organisms as assessed using the biomarkers total antioxidant capacity, lipid peroxidation and lysosomal destabilisation. Total tissue metal concentrations were highest in Port Kembla organisms, with copper contributing 56% of metals measured in organisms from this site. B. nanum from Port Kembla also had significantly higher lysosomal destabilisation, being 36% higher than Kiama and 80% higher than Shellharbour over the combined sampling times. Lysosomal destabilisation was related to total tissue metal concentration and Cu tissue concentration. The results of the present study establish B. nanum as a bioindicator of metal contamination, with effects primarily relating to copper, and support previous work on the species as an effective biomonitor of bioavailable metal.

APA, Harvard, Vancouver, ISO, and other styles

27

Han, Xuemeng, Junqiang Wang, Wenqian Cai, Xiangqin Xu, and Mingdong Sun. "The Pollution Status of Heavy Metals in the Surface Seawater and Sediments of the Tianjin Coastal Area, North China." International Journal of Environmental Research and Public Health 18, no. 21 (October 26, 2021): 11243. http://dx.doi.org/10.3390/ijerph182111243.

Full text

Abstract:

Heavy metal pollution has become a great concern due to its adverse effects on the ecological system and human health. The present study investigated the concentrations of six common heavy metals (Cr, Cu, Zn, As, Cd, and Pb) in the Tianjin coastal area to understand their distribution, enrichment, sources, and potential ecological risk levels, focusing on the main contributors. The results showed that the concentration of Cu was high in the surface seawater (6.89 µg/L for the average), while Cd was the main contaminating metal in the sediments, with an average concentration of 0.77 mg/kg. The potential ecological risk index (RI) implied that the heavy metals in the sediments could cause considerable ecological risk, and Cd was the major contributor to ecological risk in this area. In particular, the field investigation showed that Cd contamination occurred as a result of anthropogenic activities, including port transportation, mariculture, and metal fabrication along the coastal area. Therefore, it is necessary to control Cd contamination in the future to improve the quality of the marine environment in Bohai Bay.

APA, Harvard, Vancouver, ISO, and other styles

28

McDonald, Annaclaire G., Brad R. Murray, Daniel W. Krix, and Megan L. Murray. "Complex soil contamination severely impacts seed-sown crop viability in Australia." April 2021, no. 15(04):2021 (April 10, 2021): 531–37. http://dx.doi.org/10.21475/ajcs.21.15.04.p2806.

Full text

Abstract:

Food security is a critical issue for many global communities. Heavy metal contamination in soils present a major and ongoing ecological risk associated with human activities which may impact the viability and safety of seed-sown crops. To better understand the impacts of soil contamination by heavy metals on seed-sown crop viability, we examined germination responses of eight commercially-important fruit and vegetable crop species to copper, zinc, and lead contamination at levels likely to be found in contaminated regions in Australia. We compared the germination attributes of days to first germination, germination period, and total proportion of seeds germinated under concentration limits of heavy metals detected at degraded sites and current Australian National Environment Protection Measure thresholds for domestic soils (i.e., copper 6,000 mg kg-1, zinc 4,700 mg kg-1, lead 300 mg kg-1). The combined heavy metal treatment (i.e. all three metals) significantly inhibited germination for all edible crop species with only carrots able to germinate under complex, multi-metal-contaminated conditions. Seed viability was significantly decreased in mulberry (M. alba var. tatarica, M. nigra, and M. rubra) and lettuce (L. sativa), with lowered seed germination in all metals compared to carrot (D. carota), radish (R. sativus), tomato (S. lycopersicum) and common bean (P. vulgaris). These results indicate heavy metal contamination is a notable risk to seed-sown crop species, with multi-metal contamination events likely to be severely damaging to lettuce, tomato, radish, common bean, and mulberry crops

APA, Harvard, Vancouver, ISO, and other styles

29

Zhu, Xiao Juan, Wei Chen, and Jiang Hua Li. "Proteomics Study on Heavy Metal Contaminated Bellamya aeruginosas in Poyang Lake." Applied Mechanics and Materials 522-524 (February 2014): 299–302. http://dx.doi.org/10.4028/www.scientific.net/amm.522-524.299.

Full text

Abstract:

Heavy metal contamination to Poyang Lake is increasingly severe. Bellamya aeruginosas, the dominant species of bellamya in Poyang Lake, was chosen in this project to carry out a proteomics study, because they obtain nutrients from sediments directly and have a strong heavy metal enrichment capability. To get a better knowledge of the contamination level of Poyang Lake and a better understanding of toxicity and bioavailability of heavy metals contamination, the main heavy metals of surface sediments were tested and a proteomics study was carried out on bellamya aeruginosa, the dominant species of bellamya in Poyang Lake. Results of heavy metal tests show, to Poyang Lake, the most contaminated heavy metal is Cu, the widest contaminated heavy metal is Pb, the most contaminated area is the south lake area, and the least contaminated area is the entrance of Xioushui River. Proteomics analysis shows the main significantly different proteins are keratins or similar substances. These proteins are higher expressed in the samples obtained from the most contaminated area, so they could be the responding biomarkers for monitoring heavy metal contamination of surface sediment in Poyang Lake.

APA, Harvard, Vancouver, ISO, and other styles

30

OLU, Joshua, Hajara Oyiza YUSUF, Charity Irekpita AKHIGBE, and Oluchi Cynthia ABIAMERE. "Heavy metal contamination, pollution indices and health risk assessment of soil around an asphalt production company in Badagry, Lagos, Nigeria." Environmental Studies Journal 1, no. 1 (February 10, 2022): 14–35. http://dx.doi.org/10.36108/esj/2202.10.0120.

Full text

Abstract:

In the environment, heavy metal contamination tends to be ecologically important considering its toxicity and pollution of the soil. It constitutes some levels of risks and hazards to humans and the ecosystem. This study assessed the heavy metal contamination, pollution indices and associated health risk of soil around an asphalt production company. A total of 13 soil samples were obtained around asphalt plant. The heavy metals such as cadmium (Cd), iron (Fe), lead (Pb), cobalt (Co) and zinc (Zn) were analyzed. Also determined were the contamination factor (CF), cancer risk (CR), degree of contamination (DC), ecological risk index (ERI), Geo-accumulation index (Igeo), hazard index (HI), lifetime cancer risk (LCR), Nemerow integrated pollution index (NIPI), pollution load index (PLI), pollution index (PI) and target hazard quotient (THQ), and they were used in estimating pollution and health risk. The ranges of Cd, Pb, Co, Fe and Zn in the samples were: 0.006-0.11, 0.09-0.34, 0.06-0.22, 0.09-184.41 and 0.39-3.15 mg/kg respectively. The Igeo, CF, ERI, PLI, DC, NIPI and PI values of the metals were within uncontaminated level. The metals THQ and HI values were lesser than the projected limit for both adults and children. The soils’ Co, Cd and Pb did not exceed tolerable CR and LCR value of 1.0×10-4. It could be suggested that the Asphalt production company activities is not contaminating the soil around them.

APA, Harvard, Vancouver, ISO, and other styles

31

Krailertrattanachai, Nattanan, Daojarus Ketrot, and Worachart Wisawapipat. "The Distribution of Trace Metals in Roadside Agricultural Soils, Thailand." International Journal of Environmental Research and Public Health 16, no. 5 (February 27, 2019): 714. http://dx.doi.org/10.3390/ijerph16050714.

Full text

Abstract:

Vehicle emissions have been known to cause trace metal contamination in soils. The extent of such contaminations in soils, and of the effects of traffic density and distance from highways on the concentration of trace metals in roadside agricultural soils is largely unknown. This study examined the total concentrations of common trace metals (Cd, Co, Cr, Cu, Ni, Pb, V, and Zn) in roadside agricultural soils from Thailand with diverse traffic densities (approximately 30–200 million vehicles/kilometer/year), roadside distances (0, 10, 20, 50, and 100 m from the road edge), and crops (rice, maize, and sugarcane). Cadmium, Cu, Pb, and Zn concentrations significantly decreased with increasing distance away from the roads (p < 0.05). However, the concentrations of these metals were not correlated with traffic density, probably due to extensive road maintenance and expansion. The contamination factor demonstrated that the road edge soils were moderately- to highly-polluted with Cd, Cu, Pb, and Zn. The safest distance to minimize metal pollution for agricultural production is proposed to be greater than 10 m away from the road edge.

APA, Harvard, Vancouver, ISO, and other styles

32

Hidayat, yosmed, and Erismar Amri. "DETEKSICEMARAN BAKTERIOLOGIS DAN LOGAM BERAT DAGING LANGKITANG (Faunus ater)." Bioconcetta 6, no. 1 (July 2020): 14–20. http://dx.doi.org/10.22202/bc.2020.v6i2.4198.

Full text

Abstract:

This study aims to determine the level of bacteriological contamination and heavy metal lead (Pb) in langkitang (Faunus ater) meat. The sample were taken randomly as 15 samples from traders. Examination of microbial contamination in meat used a serial dilution method Most Probable Number (MPN) consisting of the presumptive test, confirmed test, and completed test. Measurement of Lead Heavy Metal (Pb) content used Atomic Absorption Spectrophotometry (AAS). The result of bacteriological testing of the MPN/ 100 ml sample showed that the tested Langkitang meat contained contaminating bacteria for each sample tested, and Lead metal was also detected, some of which had values that exceeded the threshold. Based on the results of the analysis, the langkitang meat has a microbial and lead metal contamination content that exceeds the health threshold so that it takes proper processing before the meat is consumed

APA, Harvard, Vancouver, ISO, and other styles

33

Rahman, Alexandre. "How to Remediate Heavy Metal Contamination in Soil?" Science Insights 41, no. 4 (September 30, 2022): 669–74. http://dx.doi.org/10.15354/si.22.re082.

Full text

Abstract:

The issue of heavy metal soil pollution has risen to the forefront. In addition to harming the pedosphere as a whole, soil pollution also has an impact on other significant sectors, such as air and water pollution. The two primary categories of pollution sources are natural sources and man-made sources. Mainly Hg, Cd, Pb, Cr, As, Zn, Cu, Ni, and other heavy metals are involved. The safety of agricultural products and the proper growth of people are of utmost importance. Thus, the origins of soil heavy metal pollution, the state of soil remediation research, and the development of soil heavy metal pollution remediation technology are all covered in this review. The technologies currently employed in soil heavy metal pollution remediation primarily include physical remediation, chemical restoration, bioremediation, agroecological restoration, and joint restoration. These methods are described, along with the conditions under which they can be used, application examples, and an analysis of their benefits and drawbacks. The most popular restoration technique is bioremediation.

APA, Harvard, Vancouver, ISO, and other styles

34

Su, Xiaomei, Hong Ling, Dan Wu, Qingju Xue, and Liqiang Xie. "Spatial–Temporal Variations, Ecological Risk Assessment, and Source Identification of Heavy Metals in the Sediments of a Shallow Eutrophic Lake, China." Toxics 10, no. 1 (January 4, 2022): 16. http://dx.doi.org/10.3390/toxics10010016.

Full text

Abstract:

The contamination of heavy metals (Pb, Cr, Hg, Cd, Ni, Cu, Zn, As, and Sb) in the sediments were investigated in Lake Yangcheng, a eutrophic lake in China. Results showed that the average concentrations of each metal in the surface sediments generally exceeded their corresponding background values. Higher values were observed in deeper zones, supporting the retention and accumulation of heavy metals in the core sediments. The spatial distributions of metal averages, pollution load index (PLI), and combined ecological risk index (RI) revealed that ecological risks were highest in the west lake, followed by middle lake, and were lowest in the east section. For the temporal variations of metal contents, the highest concentration was usually observed in the winter. However, the seasonal dynamics of Hg showed a different pattern with higher values in the autumn and lower values in the winter. According to contamination factor (CF), the Hg and Sb contaminations were considerable, while the other metals were moderate contamination. In terms of geoaccumulation index (Igeo) values, sediments were moderately–heavily polluted by Sb and moderately polluted by Hg, Cd, and Ni. Meanwhile, Hg exhibited a considerable health risk, while Cd and Sb were moderate risks, based on single ecological risk index (Er) values. Significant positive correlations among heavy metals and principal component analysis (PCA) indicated that anthropogenic activities were major sources. The source of Sb might be different from other metals, with industrial discharge as the main loading. This study highlighted the urgency of taking measures to prevent Hg, Sb, and Cd pollutions in Lake Yangcheng, especially the west region of this lake.

APA, Harvard, Vancouver, ISO, and other styles

35

Zhang, Xiao Ling, and Qiao Yang. "Influence of Nitrogen Nutrients on Hyperaccumulation of Sedum alfredii Hance under Complex Heavy Metals Stress." Advanced Materials Research 864-867 (December 2013): 190–93. http://dx.doi.org/10.4028/www.scientific.net/amr.864-867.190.

Full text

Abstract:

Heavy metals contamination is a major environmental issue, and phytoremediation is a promising, environmentally friendly alternative to conventional cleanup techniques for heavy metal contaminated sites. this paper is intended to explore the influence of different nitrogen nutrient levels on hyperaccumulation of sedum alfredii, a promising hyperaccumulating plant species for the phytoremediation exposured to complex contaminations. The obtained results indicated that the proper increasing of nutriogen nutrient levels enhanced the accumulation capacity of complex heavy metals in sedum alfredii hance.

APA, Harvard, Vancouver, ISO, and other styles

36

KUPLULU, O., G. IPLIKCIOGLU CIL, S. D. KORKMAZ, O. AYKUT, and G. OZANSOY. "Determination of Metal Contamination in Seafood from the Black, Marmara, Aegean and Mediterranean Sea Metal Contamination in Seafood." Journal of the Hellenic Veterinary Medical Society 69, no. 1 (May 2, 2018): 749. http://dx.doi.org/10.12681/jhvms.16400.

Full text

Abstract:

Seafood is one of the most important components of a healthy diet due to its composition. With the Black, Marmara, Aegean and Mediterranean Sea, Turkey has substantial sources of seafood. Seas are highly impacted by environmental pollution. Among these, heavy metal pollution has long been recognized as a serious problem for seafood. As heavy metals cannot be degraded, they are deposited, assimilated or incorporated in water, sediment and aquatic animals. By these properties, they can be transferred to humans through the food chain especially by the consumption of fish and shellfish. The aim of this study is to determine the concentrations of Cd, As, Pb and Hg levels in selected fish species and marine animals from all of the 4 seas of Turkey by using the ICP-MS technique, and to compare the results with the legislations safe limits. For this purpose, 13 different fish species, mussels and shrimps have been obtained from the Black, Marmara, Aegean and Mediterranean Seas. According to the results, metal concentrations decrease in the order As>Pb>Hg>Cd. In all the seas, the same order was found. Statistically significant differences were observed in the metal levels between fish species and the shellfish in all regions. Except for the two samples, all the results was found compatible with the Turkish Food Codex and European Commission Regulation limits. Arsenic levels were detected between 0,076-4,230 mg/kg within the samples. Cadmium levels were detected as higher than the limits in two samples obtained from the Mediterranean Sea, Scophthalmus maximus and Mullus barbatus species as 0,076 mg/kg and 0,064 mg/kg, respectively. The highest and the lowest levels of mercury and lead were measured as 0,005-0,405 and 0,015-0,405 mg/kg, respectively. The results obtained from this study revealed that, except for a few cases, the selected heavy metal concentrations in most samples were below the limits. Also, besides the mussels and the shrimps, there was no single type of fish that was consistently high in all metals. The examined seas and the seafood were found to be safe for human consumption.

APA, Harvard, Vancouver, ISO, and other styles

37

Ramteke, Shobhana, Bharat Lal Sahu, Nohar Singh Dahariya, Khageshwar Singh Patel, Borislav Blazhev, and Laurent Matini. "Heavy Metal Contamination of Vegetables." Journal of Environmental Protection 07, no. 07 (2016): 996–1004. http://dx.doi.org/10.4236/jep.2016.77088.

Full text

APA, Harvard, Vancouver, ISO, and other styles

38

Basta, N. T. "Heavy Metal Contamination of Soil." Soil Science Society of America Journal 70, no. 5 (September 2006): 1819. http://dx.doi.org/10.2136/sssaj2006.0010br.

Full text

APA, Harvard, Vancouver, ISO, and other styles

39

Järup, Lars. "Hazards of heavy metal contamination." British Medical Bulletin 68, no. 1 (December 1, 2003): 167–82. http://dx.doi.org/10.1093/bmb/ldg032.

Full text

APA, Harvard, Vancouver, ISO, and other styles

40

Polignano, M. L., F. Cazzaniga, A. Sabbadini, F. Zanderigo, and F. Priolo. "Metal contamination monitoring and gettering." Materials Science in Semiconductor Processing 1, no. 2 (September 1998): 119–30. http://dx.doi.org/10.1016/s1369-8001(98)00015-8.

Full text

APA, Harvard, Vancouver, ISO, and other styles

41

Lepp, Nicholas W. "Heavy Metal Contamination of Soil." Journal of Environmental Quality 35, no. 4 (July 2006): 1632. http://dx.doi.org/10.2134/jeq2006.0015br.

Full text

APA, Harvard, Vancouver, ISO, and other styles

42

Pepper, I. L., J. W. Brendecke, and R. D. Axelson. "Metal contamination on soil microorganisms." Soil Biology and Biochemistry 26, no. 8 (August 1994): 1099. http://dx.doi.org/10.1016/0038-0717(94)90128-7.

Full text

APA, Harvard, Vancouver, ISO, and other styles

43

Sani, A., S. A. Danturai,, M. Mohamed, M. B. Abubakar, M. H. Kafinga, R. W. Aliyu, A. K. Haruna,, et al. "Phytoremediation of Heavy Metals Contaminated Agricultural Soil Planted to Jatropha curcas." International Journal of Energy and Environmental Research 10, no. 3 (March 15, 2022): 14–32. http://dx.doi.org/10.37745/ijeer.13/vol10n31432.

Full text

Abstract:

This study was conducted to assess the potential of Jatropha curcas in remediating soils contaminated with heavy metals from hydrocarbon fuel. Matured cuttings of Jatropha plant were planted in the plastic pots filled with soils contaminated with three different level of HMs concentration; 250mg/kg, 500mg/kg and 1000mg/kg respectively arranged in a Completely Randomized Design (CRD). The aim was to appraise if Jatropha curcas can be used to treat the heavy metals; Zn, Ni, Cd, Pb and Cu in the contaminated soils and determine whether the treated metals complied to soil permissible limit concentration of agricultural soils advocated by Nigerian and other related international standards. Findings indicated that all the analysed metals recorded a significant statistical difference with different level of soil contamination (P<0.05). However, despite their concentration achieved compliance at their initial soil contamination, Cu, Zn and Ni were highly removed by Jatropha plant though the latter metal failed compliance to Nigerian standard at both pre and post Jatropha planting period. Moreover, the metals showed highest removal efficiency in the range of 57%-95% at 500mg/kg hydrocarbon fuel soil contamination. In contrast, Cd metal concentration was low and above compliance limit at pre and post Jatropha planting period except at 1000mg/kg hydrocarbon fuel contamination that achieved compliance of United States (US) with removal efficiency in the range of 8%-42%. However, Pb metal concentration was high and variable at both initial contamination and concentration after Jatropha planting, with the metal achieving and failing compliance of some countries at certain level of concentration after the Jatropha phytoremediation. Overall, the outcome of this research indicates that the Jatropha plant has depurated the metals effectively from the contaminated soils particularly Cu, Zn and Ni at 500mg/kg level of contamination despite the fact that the phytoremediation process was within the period of two months. Hence, the continuation of the experiment is needed in order to fully determine the actual period and appropriate level of soil contamination required for the optimum metal phytoremediation and type of metals the Jatropha plant prefers most in terms of the remediation compared to others.

APA, Harvard, Vancouver, ISO, and other styles

44

İSTANBULLUOĞLU, Hakan, Recai OĞUR, Ö. Faruk TEKBAŞ, and Bilal BAKIR. "Heavy Metal Contamination in Milk and Dairy Products." Turkiye Klinikleri Journal of Medical Sciences 33, no. 2 (2013): 410–19. http://dx.doi.org/10.5336/medsci.2012-29718.

Full text

APA, Harvard, Vancouver, ISO, and other styles

45

Shokr, Mohamed S., Mostafa A. Abdellatif, Radwa A. El Behairy, Hend H. Abdelhameed, Ahmed A. El Baroudy, Elsayed Said Mohamed, Nazih Y. Rebouh, Zheli Ding, and Ahmed S. Abuzaid. "Assessment of Potential Heavy Metal Contamination Hazards Based on GIS and Multivariate Analysis in Some Mediterranean Zones." Agronomy 12, no. 12 (December 19, 2022): 3220. http://dx.doi.org/10.3390/agronomy12123220.

Full text

Abstract:

One of the most significant challenges that global decision-makers are concerned about is soil contamination. It is also related to food security and soil fertility. The quality of the soil and crops in Egypt are being severely impacted by the increased heavy metal content of the soils in the middle Nile Delta. In Egypt’s middle Nile Delta, fifty random soil samples were chosen. Inverse distance weighting (IDW) was used to create the spatial pattern maps for four heavy metals: Cd, Mn, Pb, and Zn. The soil contamination levels in the research area were assessed using principal component analysis (PCA), contamination factors (CF), the geoaccumulation index (I-Geo), and the improved Nemerow pollution index (In). The findings demonstrated that using PCA, the soil heavy metal concentrations were divided into two clusters. Moreover, the majority of the study region (44.47%) was assessed to be heavily to extremely polluted by heavy metals. In conclusion, integrating the contamination indices CF, I-Geo, and In with the GIS technique and multivariate model, analysis establishes a practical and helpful strategy for assessing the hazard of heavy metal contamination. The findings could serve as a basis for decision-makers to create effective heavy metal mitigation efforts.

APA, Harvard, Vancouver, ISO, and other styles

46

Abdelaal, Ahmed, Ahmed I. Abdelkader, Fahad Alshehri, Asmaa Elatiar, and Sattam A. Almadani. "Assessment and Spatiotemporal Variability of Heavy Metals Pollution in Water and Sediments of a Coastal Landscape at the Nile Delta." Water 14, no. 23 (December 6, 2022): 3981. http://dx.doi.org/10.3390/w14233981.

Full text

Abstract:

This study assessed the spatiotemporal variability and pollution grades of heavy metals in water and sediments of Bahr El-Baqar drain, Eastern Nile Delta, Egypt, by integration of geochemical analysis, metal pollution indices, correlation, and multivariate statistical analyses. Twenty samples of water and sediments were collected during 2018 and analyzed for heavy metal concentrations using ICP-OES. Heavy metal contents in the water samples followed the order: Fe > Zn > Al > Pb > Mn > Cu > Ni. The drain sediments were highly contaminated with heavy metals that followed the order: Fe > Al > Mn > V > Zn > Cu > Cr > Ba > Ni > Pb > As. Spatiotemporally, most metals in the drain sediments showed a decreasing trend from upstream (south) to downstream sites (north). Results of principal component analysis (PCA) supported those from the Pearson correlation between investigated heavy metals. In water, Mn, Ni, Pb, Zn, Cu, and Fe showed highly significant correlations. In sediments, Ba, Ni, Zn, Fe, Al, Mn, and V showed strong positive correlations indicating that these metals were derived from similar anthropogenic sources. The calculated metal pollution indices: enrichment factor (EF), contamination factor (CF), pollution load index (PLI), degree of contamination (DC), and index of geo-accumulation (Igeo) indicated high loadings of heavy metals in the drain sediments. EFs revealed low, moderate to significant enrichment, whereas CFs showed low, moderate, and considerable contamination. PLI indicated low, baseline, and progressive contamination, while DC indicated low, moderate, and considerable degree of contamination. Igeo of all investigated metals (except for As; class 1) indicated extremely contaminated sediments (class 7).

APA, Harvard, Vancouver, ISO, and other styles

47

Lee, Junho, Kyungsoo Han, Dongmyung Kim, and Taeyoon Lee. "Pollution Intensity Assessment of Sediments Obtained Near Ieodo Ocean Research Station Using Pollution Index for Heavy Metals." Journal of Korean Society of Environmental Engineers 42, no. 3 (March 31, 2020): 131–41. http://dx.doi.org/10.4491/ksee.2020.42.3.131.

Full text

Abstract:

Objectives:The purpose of this study was to evaluate the heavy metal contamination level by analyzing heavy metals in sediments near Ieodo ocean research station located in southwestern Jeju Island. Methods:Sixteen sediments samples were collected from Ieodo ocean research station, and two and three sediment samples were collected from the southwestern region and between Ieodo and Jeju Island. These samples were used for heavy metal content analysis according to the marine pollution process test method, and contamination level of sediments was calculated using the measured heavy metal concentration. Results and Discussion:All heavy metals except Ni were evaluated as non-contamination level, and Ni was found to have high pollution level. According to the US Environmental Protection Agency guideline, samples 6, 9, 15, and 22 were classified as severe contamination, and according to the geoaccumulation index, samples 15 and 22 were classified as slightly contaminated for Ni. When classified by the Enrichment factor value, Ni contamination was categorized as moderately severe enrichment for samples 15 and 22. Using the potential ecological risk factor value, the ecological risks of the heavy metals in all samples were classified as low risk. The mean PEL quotient value for all six heavy metals in samples was a maximum of 0.60, indicating a 21% probability of toxicity for heavy metals in all samples.Conclusions:It was confirmed that there was no contamination by Cd, Cr, Cu, Pb, and Zn, but contamination by Ni was found to be a serious level. Compared with previous studies, the concentration of Ni in the Ieodo was found to be high, which may be due to the inflow of ocean research station or the Yangzu river runoff in China.

APA, Harvard, Vancouver, ISO, and other styles

48

Amal H Al-Bagawi, Dorsaf Mansour, and Shomokh AM Aljabri. "Trace metals assessment in agricultural soil and irrigation water at hail region Saudi Arabia." International Journal of Frontline Research in Chemistry and Pharmacy 1, no. 1 (July 30, 2022): 021–31. http://dx.doi.org/10.56355/ijfrcp.2022.1.1.0004.

Full text

Abstract:

The suitability of agricultural soil and irrigation water depends on the presence of trace metals; the aim of the present work is to assessment of the trace metals at Hail region using analytical techniques. The metal contaminations levels were determined using ICP-MS and flame photometer. The result obtained were compared to the standard samples suitable for agricultural and it was in the suitable range. The geo-accumulation (I-geo), single pollution, Nemerow pollution indices showed that the Se pollution intensity was significant for agricultural soils. I-geo values revealed no real sign of contamination with almost all the samples, reflecting a lack of contamination for all elements except Zn. While the enrichment factor (EF) for Fe was less than 2 suggested that the elements come entirely from crustal materials or natural processes. The study showed considerable variation in the levels of the analyzed elements in the soil samples. The total metal concentrations in the soil samples ordered as follows: Na > K > Fe > Mn > Zn > Ba > Cr > Ni > Cu > Pb > Cd > As.

APA, Harvard, Vancouver, ISO, and other styles

49

Enuneku, AA, and F. Ineh. "Potential Ecological Risk Assessment of Heavy Metals Contamination in Surface Sediments of Ikpoba River, Southern Nigeria." NIGERIAN ANNALS OF PURE AND APPLIED SCIENCES 3, no. 1 (July 19, 2020): 33–41. http://dx.doi.org/10.46912/napas.156.

Full text

Abstract:

The potential ecological risk assessment of heavy metals contamination in surface sediments of Ikpoba River, Edo State was estimated in this study after assessment of heavy metal concentrations in surface sediments from seven stations of the study area. Heavy metals were analyzed in the sediments using Atomic Absorption Spectrophotometer. The index of geo-accumulation for the metals (Lead (Pb); Iron (Fe); Nickel (Ni) and Copper (Cu)) studied were less than zero showing that the stations sampled were unpolluted with heavy metals. Contamination factor followed same pattern. Generally, there was a low potential ecological risk for heavy metal contamination to sediment dwelling organisms. However, station 4 (Capitol) was moderately contaminated and extremely enriched with Cu. Heavy metal values in this study were below the EPA limits for sediments except station 4 which was heavily polluted with Cu following the EPA guidelines. Regular monitoring and assessment of pollution load of Ikpoba River is recommended.

APA, Harvard, Vancouver, ISO, and other styles

50

Zhou, Ziruo, Chi Peng, Xu Liu, Zhichao Jiang, Zhaohui Guo, and Xiyuan Xiao. "Pollution and Risk Assessments of Heavy Metal(loid)s in the Soil around Lead-Zinc Smelteries via Data Integration Analysis." International Journal of Environmental Research and Public Health 19, no. 15 (August 6, 2022): 9698. http://dx.doi.org/10.3390/ijerph19159698.

Full text

Abstract:

Pb–Zn smelting is a major cause of heavy metal(loid) contaminations in soils. We collected data on heavy metal(loid)s in the soils near Pb–Zn smelteries globally from 54 peer-reviewed reports to study the metals’ distribution, pollution index, and potential ecological and health risks. We observed that 90% of the studied Pb–Zn smelteries were distributed in Asia and Europe. Heavy metal(loid)s were mainly deposited within a 2 km distance to the smelteries, with mean concentrations (mg/kg) of 208.3 for As, 26.6 for Cd, 191.8 for Cu, 4192.6 for Pb, and 4187.7 for Zn, respectively. Cd and Pb concentrations in the soil exceeded their corresponding upper continental crust values several hundred folds, suggesting severe contamination. The smelting area had the highest heavy metal(loid) contamination in soil, followed by the forest land, farmland, and living area. Compared with the soil environmental standard values from various countries, As, Cd, Pb, and Zn were considered priority pollutants for protecting the ecosystem and human health. Likewise, As, Cd, and Pb were suggested as the priority pollutants for protecting groundwater safety. The potential ecological and health risks of heavy metal(loid)s in the soil within 2 km of Pb–Zn smelteries were severe and should be of concern.

APA, Harvard, Vancouver, ISO, and other styles

Journal articles on the topic 'Metal contamination'

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles