Journal articles: 'Bioaccumulation of heavy metals'

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Ahmed, Abu Tweb Abu, Suman Mandal, Didarul Alam Chowdhury, Abu Rayhan M. Tareq, and M. Mizanur Rahman. "Bioaccumulation of Some Heavy Metals in Ayre Fish (Sperata Aor Hamilton, 1822), Sediment and Water of Dhaleshwari River in Dry Season." Bangladesh Journal of Zoology 40, no. 1 (December 10, 2012): 147–53. http://dx.doi.org/10.3329/bjz.v40i1.12904.

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The present study was carried out to determine the level of bioaccumulation of some heavy metals in a freshwater fish Ayre (Sperata aor Hamilton, 1822) collected from Rajfulbaria (23°48?56.36? N and 90°14?54.04? E) of Dhaleshwari river. Four heavy metals, namely chromium (Cr), copper (Cu), lead (Pb), and cadmium (Cd) were selected for this study. Metal concentrations were determined by Flame Atomic Absorption Spectrophotometer after nitric acid digestion of samples. The concentrations of accumulated heavy metals in fish were also compared with the concentrations of metals in the sediments and waters of that river. The level of bioaccumulations in different organs of S. aor were determined separately and compared among them. Average bioaccumulation levels in S. aor were Cr: 1.458 mg/kg, Cu: 31.500 mg/kg, Pb: 18.776 mg/kg and Cd: 0.487 mg/kg of dry weight. The levels of heavy metals in sediments were Cr: 27.393 mg/kg, Cu: 37.450 mg/kg, Pb: 15.797 mg/kg and Cd: 2.083 mg/kg, and in water were Cr: 0.130 ppm, Cu: 0.000 ppm, Pb: 0.201 ppm and Cd: 0.001 ppm.The bioaccumulation of these four heavy metals in fish organs, sediment and water samples were also compared with FAO approved standard levels and other related studies, and found that the levels of bioaccumulation in the Dhaleshwari river exceeded all the standard levels. DOI: http://dx.doi.org/10.3329/bjz.v40i1.12904 Bangladesh J. Zool. 40(1):147-153, 2012

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Noegrohati, Sri. "BIOACCUMULATION DYNAMICS OF HEAVY METALS IN _{Oreochromis nilotycus}: PREDICTED THROUGH A BIOACCUMULATION MODEL CONSTRUCTED BASED ON BIOTIC LIGAND MODEL (BLM)." Indonesian Journal of Chemistry 6, no. 1 (June 13, 2010): 61–69. http://dx.doi.org/10.22146/ijc.21775.

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In estuarine ecosystem, sediments are not only functioning as heavy metal scavenger, but also as one of potential sources for heavy metals to the ecosystem. Due the capability of aquatic organisms to accumulate heavy metals, there is possibility of heavy metals to exert their toxic effect towards the organisms and other organisms positioned in higher trophic level, such as fish, and further to human beings. To understand the different processes of heavy metal bioaccumulation in a dynamic manner, a bioaccumulation model is required. Since bioaccumulation starts with the uptake of chemical across a biological membrane, the bioaccumulation model was constructed based on Biotic Ligand Model (BLM). The input for the model was determined from laboratory scale simulated estuarine ecosystem of sediment-brackish water (seawater:Aquaâ 1:1) for determining the heavy metal fractions in sediments; simulated Oreochromis nilotycus - brackish water (fish-water) ecosystem for determining the rate constants; simulated fish-water-sediment ecosystem for evaluating the closeness between model-predicted and measured concentration, routes and distribution within specific internal organs. From these bioaccumulation studies, it was confirmed that the internalization of metals into the cells of gills and internal epithelias follows similar mechanisms, and governed mostly by the waterborne or hydrophilic heavy metals. The level of hydrophilic heavy metals are determined by desorption equilibrium coefficients, 1/KD, and influenced by salinity. Physiologically, the essential Cu and Zn body burden in O. nilotycus are tightly homeostasis regulated, shown as decreasing uptake efficiency factor, EW, at higher exposure concentrations, while non essential Cd and Hg were less or not regulated. From the distribution within specific internal organs, it was revealed that carcass was more relevant in describing the bioaccumulation condition than liver. It is clear that every heavy metal has its own bioaccumulation dynamics, depend to the metal studied and environmental conditions, however the obtained parameters are applicable to bioaccumulation of Cd and Hg in natural estuarine ecosystem of Segara Anakan, Central Java. Keywords: heavy metal, estuarine, bioaccumulation, model, dynamics

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Redondo-Gómez, Susana. "Bioaccumulation of heavy metals in Spartina." Functional Plant Biology 40, no. 9 (2013): 913. http://dx.doi.org/10.1071/fp12271.

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The Spartina Schreb. genus is composed of C4 perennial grasses in the family Poaceae. They are native to the coasts of the Atlantic Ocean in western and southern Europe, north-west and southern Africa, the Americas and the southern Atlantic Ocean islands. Most species are salt tolerant and colonise coastal or inland saltmarshes. The available literature on heavy metal bioaccumulation by Spartina sp. was compiled and compared. Spartina alterniflora Loisel. and Spartina maritima (Curtis) Fernald were the most commonly researched species of the genus, whereas many species were not represented at all. In contrast, Cu and Zn are the most intensively researched heavy metals. The few studies dealing with the physiological impacts of heavy metals or the mechanisms of metal accumulation, which involve extracellular and intracellular metal chelation, precipitation, compartmentalisation and translocation in the vascular system, were documented. Bioaccumulation of metals in roots and tillers of some species of the Spartina genus (e.g. S. maritima and Spartina densiflora Brongn.) has been described as a feasible method for remediating waters and soils contaminated with heavy metals. One such example is Spartina argentinensis Parodi, which has been found to be a Cr-hyperaccumulator; it can concentrate chromium in its tissues to levels far exceeding those present in the soil.

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Wnorowski, Aleksandra U. "Selection of Bacterial and Fungal Strains for Bioaccumulation of Heavy Metals from Aqueous Solutions." Water Science and Technology 23, no. 1-3 (January 1, 1991): 309–18. http://dx.doi.org/10.2166/wst.1991.0429.

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Eighty strains of fungi and heterotrophic bacteria, isolated from natural water sources polluted with heavy metals, were tested for their bioaccumulation abilities. Metal-resistant strains were first selected in a preliminary step. Preselected cultures were then screened for gold, silver, nickel and cadmium uptake capabilities. A collection of bioaccumulating strains, consisting of 39 strains for the recovery of gold, 9 strains for silver, 28 for cadmium and 22 for nickel, has been established. All the strains selected were able to remove metals tested from diluted solutions (ca. 5 mg/l) to levels below 0.5 mg/l. The maximum uptake capacity of strains was determined in concentrated metal solutions (20 - 50 mg/l). Nine of the strains had saturation values of 100 mg/g dry weight or higher. The importance of pH in passive bioaccumulation process is discussed.

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Bae, Weon, Rajesh K. Mehra, Ashok Mulchandani, and Wilfred Chen. "Genetic Engineering of Escherichia coli for Enhanced Uptake and Bioaccumulation of Mercury." Applied and Environmental Microbiology 67, no. 11 (November 1, 2001): 5335–38. http://dx.doi.org/10.1128/aem.67.11.5335-5338.2001.

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ABSTRACT Synthetic phytochelatins (ECs) are a new class of metal-binding peptides with a repetitive metal-binding motif, (Glu-Cys) n Gly, which were shown to bind heavy metals more effectively than metallothioneins. However, the limited uptake across the cell membrane is often the rate-limiting factor for the intracellular bioaccumulation of heavy metals by genetically engineered organisms expressing these metal-binding peptides. In this paper, two potential solutions were investigated to overcome this uptake limitation either by coexpressing an Hg2+ transport system with (Glu-Cys)20Gly (EC20) or by directly expressing EC20 on the cell surface. Both approaches were equally effective in increasing the bioaccumulation of Hg2+. Since the available transport systems are presently limited to only a few heavy metals, our results suggest that bioaccumulation by bacterial sorbents with surface-expressed metal-binding peptides may be useful as a universal strategy for the cleanup of heavy metal contamination.

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Antonious, George F., John C. Snyder, Terry Berke, and Robert L. Jarret. "ScreeningCapsicum chinensefruits for heavy metals bioaccumulation." Journal of Environmental Science and Health, Part B 45, no. 6 (July 27, 2010): 562–71. http://dx.doi.org/10.1080/03601234.2010.493495.

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Tsekova, K., A. Kaimaktchiev, and A. Tzekova. "Bioaccumulation of Heavy Metals by Microorganisms." Biotechnology & Biotechnological Equipment 12, no. 2 (January 1998): 94–96. http://dx.doi.org/10.1080/13102818.1998.10818998.

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Ali, Hazrat, Ezzat Khan, and Ikram Ilahi. "Environmental Chemistry and Ecotoxicology of Hazardous Heavy Metals: Environmental Persistence, Toxicity, and Bioaccumulation." Journal of Chemistry 2019 (March 5, 2019): 1–14. http://dx.doi.org/10.1155/2019/6730305.

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Heavy metals are well-known environmental pollutants due to their toxicity, persistence in the environment, and bioaccumulative nature. Their natural sources include weathering of metal-bearing rocks and volcanic eruptions, while anthropogenic sources include mining and various industrial and agricultural activities. Mining and industrial processing for extraction of mineral resources and their subsequent applications for industrial, agricultural, and economic development has led to an increase in the mobilization of these elements in the environment and disturbance of their biogeochemical cycles. Contamination of aquatic and terrestrial ecosystems with toxic heavy metals is an environmental problem of public health concern. Being persistent pollutants, heavy metals accumulate in the environment and consequently contaminate the food chains. Accumulation of potentially toxic heavy metals in biota causes a potential health threat to their consumers including humans. This article comprehensively reviews the different aspects of heavy metals as hazardous materials with special focus on their environmental persistence, toxicity for living organisms, and bioaccumulative potential. The bioaccumulation of these elements and its implications for human health are discussed with a special coverage on fish, rice, and tobacco. The article will serve as a valuable educational resource for both undergraduate and graduate students and for researchers in environmental sciences. Environmentally relevant most hazardous heavy metals and metalloids include Cr, Ni, Cu, Zn, Cd, Pb, Hg, and As. The trophic transfer of these elements in aquatic and terrestrial food chains/webs has important implications for wildlife and human health. It is very important to assess and monitor the concentrations of potentially toxic heavy metals and metalloids in different environmental segments and in the resident biota. A comprehensive study of the environmental chemistry and ecotoxicology of hazardous heavy metals and metalloids shows that steps should be taken to minimize the impact of these elements on human health and the environment.

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Łukowski, Adam, Józefa Wiater, and Anna Dymko. "BIOACCUMULATION OF HEAVY METALS IN FORAGE GRASSES." Inżynieria Ekologiczna 18, no. 1 (February 1, 2017): 149–58. http://dx.doi.org/10.12912/23920629/66999.

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�IRIC, Ivan, Ivica KOS, Ante KASAP, Fran PETKOVIC, and Valentino DR�AIC. "Heavy metals bioaccumulation by edible saprophytic mushrooms." Journal of Central European Agriculture 17, no. 3 (2016): 884–900. http://dx.doi.org/10.5513/jcea01/17.3.1787.

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BUSUIOC, Gabriela, and Carmen Cristina ELEKES. "Response of Four Russula Species under Copper Sulphate and Lead Acetate Treatments." Notulae Botanicae Horti Agrobotanici Cluj-Napoca 41, no. 2 (December 6, 2013): 538. http://dx.doi.org/10.15835/nbha4129146.

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Mushrooms have a species-specific affinity for heavy metals in soil. Therefore, mushrooms may act as an effective bioaccumulator of metals, thus can be used in mycoremediation technologies to remove and recover heavy metals from soil. The response of four Russula species to copper sulfate and lead acetate treatments concerning the absorption, accumulation and translocation of Fe, Cu, Zn, Mn and Pb was studied. Differences in metal concentrations were recorded between caps and stipes of the fruiting body and varied widely between the tested species. This confirms the species-dependent features of heavy metal absorption in mushrooms. Another factor that showed an influence on the bioavailability of metals in mushrooms was the metal content of soil. Similarities between the absorption and accumulation of copper and zinc were observed for R. vesca and R. atropurpurea. The treatments influenced the bioabsorption of heavy metals by the mushrooms and the metal mobility in the fruiting body. After lead acetate treatment, R. vesca, R. atropurpurea and R. integra had an increased bioaccumulation capacity compared to the control. Hyperaccumulating species, such as R. nigricans for lead soil pollution, would lead to the best results for mycoremediation as they are capable of accumulating higher concentration of heavy metals in comparison to other mushroom species.

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Heikens, A., W. J. G. M. Peijnenburg, and A. J. Hendriks. "Bioaccumulation of heavy metals in terrestrial invertebrates." Environmental Pollution 113, no. 3 (August 2001): 385–93. http://dx.doi.org/10.1016/s0269-7491(00)00179-2.

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Doshi, Hiren, Chetan Seth, Arabinda Ray, and I. L. Kothari. "Bioaccumulation of Heavy Metals by Green Algae." Current Microbiology 56, no. 3 (January 1, 2008): 246–55. http://dx.doi.org/10.1007/s00284-007-9070-z.

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Nguyen, Ha N. "Accumulation of heavy metals in ducks exposed to heavy metals-contaminated water." Journal of Agriculture and Development 20, no. 04 (August 29, 2021): 24–33. http://dx.doi.org/10.52997/jad.4.04.2021.

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The objective of this study was to determine the bioaccumulation of heavy metals (HM) (Cu, Zn, Hg, Pb and Cd) in 15 tissues (brain, breast muscle, sternum, thigh muscle, femur, blood, heart, lung, gizzard, liver, intestine, spleen, pancreas, bile and kidney) of domestic ducks exposed to HM-contaminated water with levels equal to values specified in the column B of QCVN 40:2011/BTNMT. The experiment was a completely randomized design with two treatments: without exposure to HM (CT) and with exposure to HM (ET). Each treatment was replicated 3 times. Ducks were randomly allocated to the treatments with a stocking density of 10 ducks per cage and reared for 8 weeks. The results showed that concentrations of HM, particularly toxic metals such as Hg, Pb and Cd, in all tissues of duck in the CT were lower than those in the ET. The highest levels of HM in tissues were found in the liver and kidney. In the ET, Pb levels in kidney and bone and Cd levels in liver and kidney exceeded the permissible exposure limit according to the guidance of the Ministry of Health of Vietnam and the European Commission. This study demonstrated that the accumulation of HM in duck tissues could happen even though ducks were exposed to relatively low concentrations of HM in water. Thus, further investigation on the bioaccumulation of HM in farmed ducks as well as wild water-birds should be conducted in the near future.

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Bat, Levent, Öztekin Yardim, Ayşah Öztekn, and Fatih Sahin. "Bioaccumulation of Metals in Fish from Sarikum Lake." Aquatic Science and Technology 7, no. 1 (August 30, 2018): 1. http://dx.doi.org/10.5296/ast.v7i1.13456.

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Concentrations of five heavy metals (Hg, Cd, Pb, Cu and Zn) in edible tissues of four fish species (Cyprinus carpio, Platichthys flesus, Liza aurata, Mugil cephalus) collected from Natural Reserve Area called Sarikum Lake were determined by ICP-MS (Agilent 7700x). The order of heavy metal concentration was observed as: Zn> Cu > Hg > Pb > Cd. The heavy metal levels were species specific and significantly different. The highest concentrations of Hg, Cd and Zn were found in flathead grey mullet, European flounder and common carp, respectively. The higher concentrations of Pb and Cu are present in golden grey mullet. The concentrations of Cd are in range of 0.019-0.027 µg g-1 in common carp, 0.028–0.040 µg g-1 in European flounder, 0.020-0.034 µg g-1 in golden grey mullet and 0.16-0.27 µg g-1 in flathead grey mullet tissues. Concentration of Cd in M. cephalus was limit value and precautions need to be taken in order to prevent future heavy metal contamination, but other metals were lower than those in certified values. Keywords: Cyprinus carpio, Platichthys flesus, Liza aurata, Mugil cephalus, Sarikum Lake

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Al-Najare, G. A. "Bioaccumulation of heavy metals in Acanthopagrus latus collected from Iraqi marine waters." IRAQI JOURNAL OF AQUACULTURE 10, no. 2 (2013): 107–22. http://dx.doi.org/10.21276/ijaq.2013.10.2.2.

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Al-Najare, G. A. "Bioaccumulation of heavy metals in Acanthopagrus latus Collected from Iraqi marine waters." IRAQI JOURNAL OF AQUACULTURE 11, no. 2 (2014): 125–38. http://dx.doi.org/10.21276/ijaq.2014.11.2.4.

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Timková, Ivana, Jana Sedláková-Kaduková, and Peter Pristaš. "Biosorption and Bioaccumulation Abilities of Actinomycetes/Streptomycetes Isolated from Metal Contaminated Sites." Separations 5, no. 4 (November 12, 2018): 54. http://dx.doi.org/10.3390/separations5040054.

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Heavy metal pollution is of great concern. Due to expansion of industrial activities, a large amount of metal is released into the environment, disturbing its fragile balance. Conventional methods of remediation of heavy metal-polluted soil and water are expensive and inefficient. Therefore, new techniques are needed to provide environmentally friendly and highly selective remediation. Streptomycetes, with their unique growth characteristics, ability to form spores and mycelia, and relatively rapid colonization of substrates, act as suitable agents for bioremediation of metals and organic compounds in polluted soil and water. A variety of mechanisms could be involved in reduction of metals in the environment, e.g., sorption to exopolymers, precipitation, biosorption and bioaccumulation. Studies performed on biosorption and bioaccumulation potential of streptomycetes could be used as a basis for further development in this field. Streptomycetes are of interest because of their ability to survive in environments contaminated by metals through the production of a wide range of metal ion chelators, such as siderophores, which provide protection from the negative effects of heavy metals or specific uptake for specialized metabolic processes. Many strains also have the equally important characteristic of resistance to high concentrations of heavy metals.

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Journal, Baghdad Science. "Bioaccmulation of Some Heavy Metals in Aquatic Plant Myriophyllum verticilatum." Baghdad Science Journal 4, no. 3 (September 2, 2007): 358–62. http://dx.doi.org/10.21123/bsj.4.3.358-362.

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The present study was invistigated to show the bioaccumulation of some heavy metals (Cd, Co, Cr, Cu, Fe, Mn, Ni, Pb, Zn) by use Aquatic plant Myriophyllum verticilatum growing in Euphrates river between Spring 2004 to Winter 2005, and these heavy maters was studied in Dissolved and particulat phase of water and exchangable and residual phase of sediment. Heavy metals accumulated according the system water-sediment-aquatic plant, and recorded bioaccumulation factor 1.010, 0.005, 0.009, 0.011, 0.012, 0.010, 0.010, 0.010, 0.011, respectively.

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Putri, Ajeng Kurniasari, Giri Rohmad Barokah, and Nuri Andarwulan. "Human Health Risk Assessment of Heavy Metals Bioaccumulation In Fish and Mussels from Jakarta Bay." Squalen Bulletin of Marine and Fisheries Postharvest and Biotechnology 12, no. 2 (August 4, 2017): 75. http://dx.doi.org/10.15578/squalen.v12i2.286.

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Aquatic environment of Jakarta Bay have already been highlighted due to its heavy metals contamination which may lead into food safety concern of fisheries products derived from this region. This research aimed to investigate bioaccumulation level of heavy metals (Pb, Cd, and As) in fish and mussels from Jakarta Bay, as a human risk assessment of seafood consumption. Samples of mussels and fish were taken from Penjaringan, Tarumanegara, Cilincing, and Tanjung Pasir district. Bioaccumulation of heavy metals was analyzed by Inductively Coupled Plasma -Mass Spectrometry technique. Results of the study revealed that metals bioaccumulation in fisheries products were varied, with As (Arsenic) as the highest metal contaminant (0.68 mg/kg, dry weight). Furthermore, estimated daily intake (EDI), target hazard quotient (THQ), total target hazard quotient (TTHQ), and safety limits prescribed by various agencies, showed that consumption of fisheries products from Jakarta Bay considered as relatively safe for human health in total of food ingestion rate of fish 57.34 g/day. These results are expected to serve as a baseline to construct preventive and palliative policies for food safety of fisheries products from Jakarta Bay.

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Goonasakran, Raja Razesvari, Mohamed Kaberi Ghani, Ismail Sahid, Shafee Ab Wahab, and Khairiah Jusoh. "The Bioaccumulation of Heavy Metals in Paddy Plants." International Journal of Environmental Sustainability 9, no. 3 (2014): 11–14. http://dx.doi.org/10.18848/2325-1077/cgp/v09i03/55097.

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Schembri, Mark A., Kristian KjÃ¦rgaard, and Per Klemm. "Bioaccumulation of heavy metals by fimbrial designer adhesins." FEMS Microbiology Letters 170, no. 2 (January 1999): 363–71. http://dx.doi.org/10.1111/j.1574-6968.1999.tb13396.x.

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Ge, W., D. Zamri, H. Mineyama, and M. Valix. "Bioaccumulation of heavy metals on adapted Aspergillus foetidus." Adsorption 17, no. 5 (April 2, 2011): 901–10. http://dx.doi.org/10.1007/s10450-011-9359-x.

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Li, Xingjie, Dongbo Li, Zhenning Yan, and Yansong Ao. "Biosorption and bioaccumulation characteristics of cadmium by plant growth-promoting rhizobacteria." RSC Advances 8, no. 54 (2018): 30902–11. http://dx.doi.org/10.1039/c8ra06270f.

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Kwarciak-Kozłowska, Anna, Lucyna Sławik-Dembiczak, and Bartłomiej Bańka. "Phycoremediation of Wastewater: Heavy Metal and Nutrient Removal Processes." Ochrona Srodowiska i Zasobów Naturalnych 25, no. 4 (December 10, 2014): 51–54. http://dx.doi.org/10.2478/oszn-2014-0026.

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Abstract Phycoremediation is the use of algae for the removal or biotrans-formation of pollutants from wastewater. The study is a novel at-tempt to integrate nutrient (N and P) removal and some heavy met-als (iron, manganese and zinc) bioaccumulation from municipal wastewater using two microalgae species: Chlorella vulgaris and Scenedesmus armatus. The Chlorella vulgaris showed higher re-moval of total nitrogen (TN) both in influent and effluent waste water than Scenedesmus armatus. Nevertheless, more than 51% of total phosphorus (TP) in effluent and 36% in influent wastewaters were removed by Scenedesmus armatus. More efficient microalga in heavy metal removal in influent wastewater was Scenedesmus armatus. The results showed that Chlorella vulgaris was appropriate for TN removal and bioaccumulation of heavy metals from effluent wastewater. Nevertheless, Scenedesmus armatus was highly pref-erable for heavy metals removal from influent wastewater.

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NJOKU, Kelechi L., Omolola E. OJO, and Anuoluwapo O. JOLAOSO. "Growth and ability of Senna alata in phytoremediation of soil contaminated with heavy metals." Notulae Scientia Biologicae 12, no. 2 (June 29, 2020): 420–32. http://dx.doi.org/10.15835/nsb12210523.

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The performance and impact of Senna alata on experimental heavy metal contaminated soil were investigated in this study. Soils in different pots were contaminated with different levels of lead, nickel, chromium and cadmium based on WHO limits for heavy metals. Seeds of S. alata were planted in the contaminated soils. The plant growth was studied for 60 days. Some soil parameters and heavy metal contents of the soil were evaluated at the beginning and at the end of the study. The leaf area, the plant height and the number of actively growing stems decreased with increase in the amount of each metal added to the soil. At 60 days, there was significant reduction (p<0.05) of the heavy metals due to the growth of S. alata compared to the soil without the plant. There was reduction in the total organic matter content and the pH of the soil, but the moisture content of the contaminated soils generally increased due to the growth of S. alata. There was a positive correlation (p = 0.918) between the percentage remediation and the bioaccumulation factor, suggesting that the remediation of the heavy metals by the plant mostly occurred through bioaccumulation. A positive correlation between the percentage reduction of the heavy metals and the reduction of pH of the soil noticed suggests that growth of S. alata leads to decrease in soil pH and will enhance the remediation of soil contaminated with the heavy metals. The findings of this study show that apart from the medicinal values of S. alata, it can be useful in remediation of heavy metal polluted soils which occurs mostly through phytoextraction.

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Ologundudu, Foluso, Adegbite Tobi, and Omotola Fopeyemi. "Bioaccumulation potential and health risk assessment of heavy metals in Corchorus olitorius L. (Malvaceae) and Amaranthus hybridus L. (Amaranthaceae) obtained from a selected dump site in Akure, Nigeria." Brazilian Journal of Biological Sciences 6, no. 12 (2019): 149–60. http://dx.doi.org/10.21472/bjbs.061214.

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Heavy metal contamination of polluted site has become a recurring decimal globally posing a threat to human life and biodiversity. This study was carried out to investigate the bioaccumulation potential and health risk assessment associated with the consumption of two indigenous vegetables Corchorus olitorius L. (Malvaceae) and Amaranthus hybridus (Amaranthaceae) in Akure. Initial pre soil analysis showed that the heavy metal concentration were above the safe limit as recommended by World Health Organization (WHO). The heavy metals investigated include Cr, Ni, Cd, Fe and Pb for their bioaccumulation factor to provide baseline data regarding environmental safety and suitability of the vegetables for human consumption. Translocation factor, Daily Intake of Metal (DIM), Health Risk Index (HRI) and Oral Refrence Dose (RFD) were calculated following standard methods. This study concludes that different vegetables accumulate and translocate variable amount of heavy metals from the soil into their tissues. Hence, it is not advisable to consume vegetable samples collected from this site based on the permissible limits as recommended by World Health Organization (WHO).

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Irawati, Wahyu, Aaron Hasthosaputro, and Lucia Kusumawati. "Multiresistensi dan Akumulasi Acinetobacter sp. IrC2 terhadap Logam Berat." JURNAL BIOLOGI PAPUA 12, no. 2 (September 30, 2020): 114–22. http://dx.doi.org/10.31957/jbp.1207.

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The increasing industrial activity in Indonesia, that is not equipped with appropriate waste treatment, has caused an increase of heavy metal contaminants in water bodies. Heavy metals contamination such as copper (Cu), mercury (Hg), cadmium (Cd), and lead (Pb) contamination in water bodies have endangered aquatic life and public health. For this reason, it is urgently important to lower down the concentration of heavy metal pollutants in the water bodies surrounding industrial areas. Compared to chemical remediation, bioremediation of heavy metal by using indigenous bacteria is more effective and economical, since it can be applied in situ directly and be used repeatedly. Acinetobacter sp. IrC2, used in this study, is Indonesian indigenous bacteria isolated from the industrial waste treatment facility in Rungkut, Surabaya. This study aims, firstly, to investigate the heavy metal multiresistance of Acinetobacter sp. IrC2 against mercury, cadmium, and lead. Secondly, this study intends to examine its bioaccumulation capacity for single and heavy metal alloys. The heavy metal multiresistance test was carried out by measuring the minimum heavy metal concentrations that inhibit bacterial growth (Minimum Inhibitory Concentration/MIC). The bioaccumulation capacity was measured using an atomic absorption spectrophotometer (AAS). It is shown that Acinetobacter sp. IrC2 has high multiresistance to mercury, cadmium, and lead with MIC values of 12 mM, 8 mM, and 18 mM, respectively. Furthermore, it is also resistant to heavy metal mixture of 4.5 mM. The mechanism of bacterial resistance in response to heavy metal toxicity, in general, is by accumulating heavy metals in the cells. The highest amount of accumulated heavy metals identified, from bacteria grown in the medium contains a mixture of heavy metals, were 0.023 mg, 0.084 mg, 0.684 mg, and 1.476 mg per gram of cell dry weight for copper, mercury, cadmium and lead respectively. In conclusion, Acinetobacter sp. IrC2 is a promising heavy metal bioremediation agent due to its heavy metal multiresistance and accumulator characteristics. Key words: Acinetobacter sp. IrC2; cadmium; copper; lead; merkuri

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Kováčik, Jozef. "Antioxidative Responses of Microalgae to Heavy Metals." Acta Environmentalica Universitatis Comenianae 24, no. 2 (December 1, 2016): 23–31. http://dx.doi.org/10.1515/aeuc-2016-0009.

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AbstractMicroalgae are unicellular free living entities and therefore their responses to excess of heavy metals must be faster and more efficient than those in vascular plants protected by various types of tissues. Up to date, numerous studies reported metal bioaccumulation potential of algae but metabolic responses have relatively rarely been monitored. Here I provide basic overview of quantitative changes of ascorbic acid (AA), reduced glutathione (GSH), phytochelatins (PCs) and selected related enzymes (ascorbate peroxidase and glutathione reductase) in some common microalgae exposed to various metals (cadmium mainly). Despite various culture and exposure conditions, some common signs of metal toxicity (including e.g. enhancement of phytochelatin biosynthesis) are clearly identifiable in algae. Other metal chelators such as organic acids are also briefly mentioned. Comparison with macroalgae, mosses and vascular plants is discussed in terms of basal values and evolutionary similarities.

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Guan, Yi Dong, Ye Hong Du, Zhen Dong Li, and An Cheng Luo. "Assessing Soil and Plant Pollution by Abandoned Rural Waste Dumping Sites in Ningbo, China." Applied Mechanics and Materials 138-139 (November 2011): 1149–55. http://dx.doi.org/10.4028/www.scientific.net/amm.138-139.1149.

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This paper reports the concentration of heavy metals (Cr, Cu, Zn, Cd and Pb) in the soils and rices surrounding the abandoned rural waste dumping sites in Ningbo. Igeo (geoaccumulation index) was calculated to assess the contamination degree of heavy metals in soils. The mean contents of Cr, Cu, Cd, Zn and Pb of soils were 33.3, 24.1, 1.5, 118.9 and 45.6 mg/(kg DW) (dry weight), respectively. All of them were much higher than that of the reference value (i.e. CK), but there were no coherent trend of the metal contents within 1-120m distance from the dumping site. Igeo of heavy metals reveals the order of Cd>Cu>Cr>Pb>Zn, and the contamination assessment of soils using Igeo indicate the moderate Cd pollution, while the soils were unpolluted-moderately overall by Cr, Cu, Zn as well as Pb. The heavy metal contents in root, stem & leaf and rice grains were all remarkable higher than that of the CK at 20-120 m distances, and the heavy metal contents in root were evidently much higher than other plant parts, while those in rice grain were lowest, indicating the great bioaccumulation trend of heavy metals. Although the metal contents in the rice grain were within the legislation limit, its bioaccumulation trend of heavy metals was remarkable, whose contents were 4.38-fold for Cr, 1.76-fold for Cu, 1.28-fold for Zn, 2.67-fold for Cd and 3.03-fold for Pb higher than that of reference value, respectively. Finally, we proposed a decentralized in-situ restoration approach for the dumping sites.

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Sharma, M., R. Gandotra, and S. Jangral. "Quantification of Heavy Metal Accumulation in Water and Edible Fish Tissue Samples Collected From the River Tawi, Jammu, India." Journal of Bio-Science 29, no. 2 (August 4, 2021): 19–29. http://dx.doi.org/10.3329/jbs.v29i2.54951.

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The present study estimated the concentration (in ppm) of heavy metals of Zn, Fe, Cu and Pb in water samples and edible tissue of Labeo boga; both collected from the non polluted (Station I) and polluted (Station II) locations of river Tawi, Jammu, India. The mean concentration of heavy metals (Zn, Fe, Cu, Pb) at Station I were 0.048±0.008 (ppm); 0.016±0.001 (ppm); 0.157±0.002 (ppm) and 0.0001±0.0001 respectively; while at Station II, these values were 0.133±0.001 (ppm); 0.022±0.002 (ppm); 0.206±0.002 (ppm) and 0.002±0.001 (ppm) respectively; the statistical difference between the stations were significantly higher (p<0.05). The order of heavy metal load obtained in water samples at both the stations was found to be Fe>Zn>Cu>Pb. Also, the mean bioaccumulation of heavy metals viz. Zn, Fe, Cu and Pb in the edible tissue of fish at Station I was found to be 0.374±0.011 (ppm), 0.105±0.02 (ppm); 0.094±0.04 (ppm) and0.001±0.0001 (ppm) respectively; on the other hand, mean bioaccumulation was 0.539±0.013 (ppm); 0.156±0.04 (ppm); 0.121±0.023 (ppm) and 0.0013±0.0001 (ppm) respectively at Station II. Even though bioaccumulation of the heavy metals in the experimental sites did not exceed the acceptable limits recommended by the agencies like FAO and WHO, the present results showed an increasing trend of the accumulation, which definitely poses a serious threat to the survival of aquatic organisms in the study area. J. Bio-Sci. 29(2): 19-29, 2021 (December)

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Vashishth, Amit, Nimisha Tehri, and Pawan Kumar. "The potential of naturally occurring bacteria for the bioremediation of toxic metals pollution." Brazilian Journal of Biological Sciences 6, no. 12 (2019): 39–51. http://dx.doi.org/10.21472/bjbs.061205.

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An increase in industrialization and various kind of human activities added a huge amount of toxic heavy metals in the soil. As a result, toxic heavy metals in the environment may be adversely affects human being and aquatic ecosystem. Thus, it is very essential to understand mechanism of bioremediation through eco-friendly agent i.e. bacteria. Accumulation of high metal concentrations in soil above threshold limit causes lethal to bacterial communities in the environment. Few bacteria develop resistance mechanism to tolerate these toxic heavy metals and contain various methods to respond the metal stress. The present review emphasizes to understand the mechanism of bacterial resistance against toxic metals. Moreover, mechanism of bioaugmentation, biosorption, and bioaccumulation methods also described clearly.

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GEORGESCU, Bogdan, Daniel MIERLITA, Danut STRUTI, Hermina KISS, and Anca BOUARU. "Metabolic, Bioproductive and Reproductive Effects of Aquatic Exposure to Cadmium in Dish- A Review." Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca. Animal Science and Biotechnologies 74, no. 1 (May 18, 2017): 1. http://dx.doi.org/10.15835/buasvmcn-asb:12198.

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Cadmium (Cd) exposure in fish is the result of aquatic pollution with heavy metals, which is mainly caused byanthropic interventions. Rarely, Cd mobilization from natural resources takes place. Bioaccumulation in tissues and organs is a property of this heavy metal, to generate various pathological effects and major risks due to bio-propagation within the human food chain. Wehereby reviewed the main circumstances and levels of exposure to Cd in the aquatic environment, and effects on growth, development and reproduction induced by its bioaccumulation in fish, as well as the possible ramifications for food security in humans.

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Talukdar, Tulika, and Dibyendu Talukdar. "Heavy Metal Accumulation as Phytoremediation Potential of Aquatic Macrophyte, Monochoria vaginalis (Burm.F.) K. Presl Ex Kunth." International Journal of Applied Sciences and Biotechnology 3, no. 1 (March 9, 2015): 9–15. http://dx.doi.org/10.3126/ijasbt.v3i1.12193.

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Bioaccumulation potential of six ecotypes, collected from six different industrial zones of lower Indo-Gangetic basin of West Bengal, India,of Monochoria vaginalis, commonly known as oval-leafed pondweed has been investigated based on chromium (Cr), cadmium (Cd) andCopper (Cu) accumulation pattern in different plant organs. Bioaccumulation potential was assessed by bioaccumulation factors (BFs-leavesmetal concentration/soil metal concentration), bioconcentration factors (BCFs- roots metal/soil metal), transfer factors (TFs-leaves +rhizomes/roots) and enrichment factors (EFs-metals in edible parts/soil metal). Accumulation pattern significantly differed among ecotypes,and accumulation in plant organs was highly metal-specific. BFs for Cr and Cd were >>1 in most of the ecotypes while high TFs (>>1) werenoticed in six ecotypes for Cr and Cu. BCFs was >>1 in all the ecotypes for Cd accumulation only. EFs values for the three metals hoveredaround 1 but it was > 1.0 for Cu in all the six ecotypes. The results suggested that Cr and Cu predominantly accumulated in leaves and rhizomeswhile Cd was predominantly sequestered in roots of M. vaginalis ecotypes. Cu, a redox active metal, showed higher capability than Cd and Crto accumulate in edible parts. In the present study, potential plant parts in M. vaginalis have been identified as bioaccumulation organs withoutany apparent symptoms of toxicity which can be used as phytoremediation of heavy metal contamination in aquatic ecosystems of lower Indo-Gangetic basin of India.DOI: http://dx.doi.org/10.3126/ijasbt.v3i1.12193 Int J Appl Sci Biotechnol, Vol. 3(1): 9-15

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Xiao, Min, Jian Can Hu, Wen Li Liu, and Feng Ming Nie. "Application of Biopolymer-Based Adsorbents in Removal of Heavy Metals." Advanced Materials Research 1048 (October 2014): 373–77. http://dx.doi.org/10.4028/www.scientific.net/amr.1048.373.

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Heavy metal pollution has raised a lot of concerns because of its bioaccumulation and non-degradability. A variety of methods have been applied in removal of heavy metals. This paper focused on the method of biosorption using biopolymer-based adsorbents in removing heavy metals from waster water. Cellulose and chitin/chitosan are abundant in supply and contain reactive functional groups. Cellulose-based adsorbents prepared from direct chemical modification or graft copolymerization are proved to show chelating ability to bind heavy metals. Chitin-and chitosan-based adsorbents have improved mechanical strength and better resistance to chemical conditions after physical or chemical modification. The regeneration and reusability of biopolymer-based adsorbents were also discussed in this paper.

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ZHAO, Mei-hua, Chao-sheng ZHANG, Guang-ming ZENG, Dan-lian HUANG, and Min CHENG. "Toxicity and bioaccumulation of heavy metals in Phanerochaete chrysosporium." Transactions of Nonferrous Metals Society of China 26, no. 5 (May 2016): 1410–18. http://dx.doi.org/10.1016/s1003-6326(16)64245-0.

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Søberg, Laila C., Jes Vollertsen, Godecke-Tobias Blecken, Asbjørn Haaning Nielsen, and Maria Viklander. "Bioaccumulation of heavy metals in two wet retention ponds." Urban Water Journal 13, no. 7 (March 30, 2015): 697–709. http://dx.doi.org/10.1080/1573062x.2015.1024689.

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El-Khatib, Ahmed Ali, Nasser A. Barakat, Naglaa A. Youssef, and Nesrin A. Samir. "Bioaccumulation of heavy metals air pollutants by urban trees." International Journal of Phytoremediation 22, no. 2 (August 21, 2019): 210–22. http://dx.doi.org/10.1080/15226514.2019.1652883.

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Gbaruko, B. C., and O. V. Friday. "Bioaccumulation of heavy metals in some fauna and flora." International Journal of Environmental Science & Technology 4, no. 2 (March 2007): 197–202. http://dx.doi.org/10.1007/bf03326274.

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Neidoni, Dorian Gabriel, Valeria Nicorescu, Ladislau Andres, Monica Ihos, and Carol Blaziu Lehr. "The Capacity of Lemna Minor L. to Accumulate Heavy Metals (Zinc, Copper, Nickel)." Revista de Chimie 69, no. 11 (December 15, 2018): 3253–56. http://dx.doi.org/10.37358/rc.18.11.6724.

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The assessment of the storage capacity of heavy metals (Zn, Cu, Ni) in Lemna minor L., was carried out on wastewater from galvanizing plants. Purification yield decreases with increasing metal concentration in water. The rate of bioaccumulation is high in the first three days, then decreases over the next four days.

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Numbere, Aroloye O. "Bioaccumulation of Total Hydrocarbon and Heavy Metals in Body Parts of the West African Red Mangrove Crab (Goniopsis pelii) in the Niger Delta, Nigeria." International Letters of Natural Sciences 75 (May 2019): 1–12. http://dx.doi.org/10.18052/www.scipress.com/ilns.75.1.

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This study is based on bioaccumulation of total hydrocarbon (THC) and heavy metals in body parts of the West African red mangrove crab (G. pelii), which inhabit polluted mangrove forests. Thirty crabs were captured in October, 2018 and sorted into male and female. Their lengths and widths were measured, and body parts dismembered and oven-dried at 70 ͦ C for 48 hours. Physicochemical analysis for Cadmium (Cd), Zinc (Zn), Lead (Pb) and THC was measured by spectrophotometric method using HACH DR 890 colorimeter (wavelength 420 nm) and microwave accelerated reaction system (MARS Xpress, North Carolina) respectively. There was no significant difference (P > 0.05) in THC and heavy metals in the body parts of crabs. However, Zinc was highest in claw (993.4±91.3 mg/l) and body tissues (32.5±1.9 mg/l), Pb was highest in carapace (34.6±2.8 mg/l) and gill (151.9±21.6 mg/l) while THC was highest in intestine (39.5±2.9 mg/l) and gut (52.4±13.4 mg/l). The order of concentration is Zn>Pb>THC>Cd. Male crabs had slightly higher THC and heavy metal concentration than female crabs probably because of their large size. There is negative correlation between carapace area and THC concentration (R = -0.246), meaning THC decreases with increasing carapace size. Internal parts of crab had higher THC and heavy metal concentration than external parts. These results show that there is high bioaccumulation of THC and heavy metals in crab, which is above WHO/FAO standard. This implies that the crabs are unfit for human consumption. The smaller the crab the better it is for consumption in terms of bioaccumulation of pollutants.

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Mareri, B., E. Kitur, and P. Obade. "Bioaccumulation of zinc, lead, cadmium in water hyacinth, hippo grass and papyrus reed as water quality indicator in River Kisat in Kisumu County, Kenya." African Journal of Pure and Applied Sciences 2, no. 2 (June 30, 2021): 100–107. http://dx.doi.org/10.33886/ajpas.v2i2.213.

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River Kisat in Kenya is increasingly being polluted serving as a sink for waste receiving effluent from sewerage, industrial waste and agricultural pesticide residues leading to heavy metal contamination. This has led to the contamination of the aquatic ecosystem and water used by communities for consumption and farming. Little information is available on the bio-indicative aspects of water quality using bioaccumulation factor by macrophytes. This study aimed at determining concentrations of Zn, Pb and Cd in water, (Eichhornia crassipes (water hyacinth), Vossia cuspidata (hippo grass), Cyperus papyrus (papyrus reed) and bioaccumulation factors (BAF) in River Kisat, Kisumu County. This was determined following laboratory standard procedures using Atomic Absorption Spectrophotometer (AAS). Results showed mean concentrations (mg/L) of Cd (Below detectable limit), Zn (0.2 -0.15) and Pb (0.03-0.03) in water. Mean values were within allowable WHO drinking water limits except for Pb which was above acceptable limits. Zn recorded highest accumulated levels in E. crassipes (72.43mg/L), C. papyrus (70.13mg/L) and V. cuspidate (71.03mg/L). E. crassipes was observed to bioaccumulate the highest concentration of the heavy metals with C. papyrus bioaccumulating the lowest (E. crassipes > V. cuspidata> C. papyrus). Pearson matrix correlation analysis showed positive significant correlations (r = 0.621; p = 0.027) between Zn and Pb in water and the macrophytes which reflected a common source of pollution and indication of accumulation. BAF recorded for all macrophytes ranged from 2.45 to 6.85, above value of 1, indicating significant bioaccumulation for Zn and Pb. The findings from this study showed higher concentrations of Zn and Pb in the macrophytes in comparison to the water in River Kisat with BAF values >1 indicating bioaccumulation which represented poor water quality. The study recommends local authorities employ monitoring processes with incorporation of BAF as a water quality indicator where low metal concentrations in water are recorded, introduce penalties for polluters and sensitize local inhabitants on detrimental health effects of heavy metal and avoid use of River Kisat water for agricultural activities.

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Ogo, O., S. Agbara, B. Inalegwu, and IW Nyinoh. "Assessment of Heavy Metal Bioaccumulation Capacity of Calopogonium muconoides and Senna obtusifolia as Potential Bioremediation Agents." NIGERIAN ANNALS OF PURE AND APPLIED SCIENCES 4, no. 1 (August 21, 2021): 191–200. http://dx.doi.org/10.46912/napas.230.

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A wide range of inorganic and organic compounds such as combustibles, and putrescible substances, hazardous waste, explosives, petroleum products and heavy metals (HM) can cause contamination. In addition, the non-biodegradability of heavy metals further exacerbates environmental pollution with its attendant health consequences on the biotic components of the ecosystem including humans. The use of living organisms such as plants and microbes is increasingly becoming acceptable practice of sustainable environmental sanitation. However, identification of potential bioremediation agents is still challenging. This study was carried out to bridge this gap by assessing heavy metal bioaccumulation properties of Calopogoniun Muconoides and Senna obtusifolia plants at contaminated site of mechanic workshop (site 1) in comparative to a physically non-contaminated site (site 2) within Makurdi metropolis of Benue State Nigeria. The selected plants were obtained from both sites and evaluated for their bioaccumulation capacities using standard procedures. The results revealed the sample plants accumulated high levels of heavy metals particularly in the leaves and roots, suggesting the utilization of phytoextraction, phytostabilization and phytovolatilization mechanisms of remediation. The plants and HM generally presented an order of concentration and bioaccumulation as: Senna obtusifolia > Calopogonium Muconoides; Zn > Fe > Pb > Cu > Cd > Cr > Ni. These findings suggest that these novel plants, especially Senna obtusifolia are good agents of bioremediation of heavy metals. Studies involving isotopic labeling to determine the exact mechanism of remediation as well molecular techniques such as transcriptomics and proteomics to identify genes/molecules that confer phytoremediation potential on the plants would be the next focus of our research in this emerging field of environmental biochemistry.

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Redha, Amina, Redha Al-Hasan, and Mohammad Afzal. "Synergistic and concentration-dependent toxicity of multiple heavy metals compared with single heavy metals in Conocarpus lancifolius." Environmental Science and Pollution Research 28, no. 18 (January 14, 2021): 23258–72. http://dx.doi.org/10.1007/s11356-020-12271-0.

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AbstractWhile heavy metals (HMs) naturally occur in soil, anthropogenic activities can increase the level of these toxic elements. Conocarpus lancifolius Engl. (Combretaceae) was investigated as a potential phytoremediator of soils contaminated with HM containing crude oil. This study assessed the potential of C. lancifolius (CL), a locally available plant species in Kuwait, for resolving local issues of the HM-contaminated soils. The absorption, accumulation, and distribution of three toxic HMs (Cd, Ni, and Pb) and essential metals (Fe, Mg, and metalloid Se) were examined, and their role in plant toxicity and tolerance was evaluated. Conocarpus lancifolius plants were exposed to two different concentrations of single and mixed HMs for 30 days. The accumulation of HMs was determined in the roots, leaves, stems, and the soil using ICP/MS. Biomass, soil pH, proline and protein content, and bioaccumulation, extraction, and translocation factors were measured. The bioaccumulation, extraction, and transcription factors were all >1, indicating CC is a hyperaccumulator of HM. The HM accumulation in CL was concentration-dependent and depended on whether the plants were exposed to individual or mixed HMs. The C.C leaves, stems, and roots showed a significant accumulation of antioxidant constituents, such as proline, protein, Fe, Mg, and Se. There was an insignificant increase in the soil pH, and a decrease in plant biomass and a significant increase in protein, and osmoprotective-proline as a result of the interaction of mixed heavy metals that are more toxic than single heavy metals. This study indicates that C. lancifolius is a good candidate for phytoremediation of multiple HM-contaminated soils. Further studies to establish the phyto-physiological effect of multiple heavy metals are warranted.

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Abdullateef Abdullahi Ibrahim, Ali Gambo Yusuf, Gambo Ismail, Muhammad Abdullahi Ibrahim, Abdulhamid Ruwa Musa, and Mustapha Said Sulaiman. "Conceptual Background of Bioaccumulation in Environmental Science." World Journal of Advanced Pharmaceutical and Life Sciences 1, no. 1 (June 30, 2021): 035–41. http://dx.doi.org/10.53346/wjapls.2021.1.1.0015.

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Environmental metal pollution is one of the serious global problems with severe health effects due to its persistence and accumulation in living organisms, these require biological strategies such as bioaccumulation for remediation, the main environmental contaminants are associated to water, soil, and air. Meanwhile, Bioaccumulation is the accumulation of pollutants in living organisms which enable to assess the risk related to their presence in the ecosystems. In other words; Bioaccumulation is the net result of all uptake and loss processes, such as respiratory and dietary uptake, and loss by egestion, metabolism, passive diffusion, transfer to offspring and growth. Hence, this paper provides the conceptual background of bioaccumulation factors, effect of heavy metals on the ecosystems, and the organisms involved in the processes as well as some fishes and plants responsible for bioaccumulation.

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Petrea, Ștefan-Mihai, Mioara Costache, Dragoș Cristea, Ștefan-Adrian Strungaru, Ira-Adeline Simionov, Alina Mogodan, Lacramioara Oprica, and Victor Cristea. "A Machine Learning Approach in Analyzing Bioaccumulation of Heavy Metals in Turbot Tissues." Molecules 25, no. 20 (October 14, 2020): 4696. http://dx.doi.org/10.3390/molecules25204696.

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Metals are considered to be one of the most hazardous substances due to their potential for accumulation, magnification, persistence, and wide distribution in water, sediments, and aquatic organisms. Demersal fish species, such as turbot (Psetta maxima maeotica), are accepted by the scientific communities as suitable bioindicators of heavy metal pollution in the aquatic environment. The present study uses a machine learning approach, which is based on multiple linear and non-linear models, in order to effectively estimate the concentrations of heavy metals in both turbot muscle and liver tissues. For multiple linear regression (MLR) models, the stepwise method was used, while non-linear models were developed by applying random forest (RF) algorithm. The models were based on data that were provided from scientific literature, attributed to 11 heavy metals (As, Ca, Cd, Cu, Fe, K, Mg, Mn, Na, Ni, Zn) from both muscle and liver tissues of turbot exemplars. Significant MLR models were recorded for Ca, Fe, Mg, and Na in muscle tissue and K, Cu, Zn, and Na in turbot liver tissue. The non-linear tree-based RF prediction models (over 70% prediction accuracy) were identified for As, Cd, Cu, K, Mg, and Zn in muscle tissue and As, Ca, Cd, Mg, and Fe in turbot liver tissue. Both machine learning MLR and non-linear tree-based RF prediction models were identified to be suitable for predicting the heavy metal concentration from both turbot muscle and liver tissues. The models can be used for improving the knowledge and economic efficiency of linked heavy metals food safety and environment pollution studies.

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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.

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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.

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Abou-Aly, Hamed E., Ahmed M. Youssef, Taha A. Tewfike, Eman A. El-Alkshar, and Rasha M. El-Meihy. "Reduction of heavy metals bioaccumulation in sorghum and its rhizosphere by heavy metals-tolerant bacterial consortium." Biocatalysis and Agricultural Biotechnology 31 (January 2021): 101911. http://dx.doi.org/10.1016/j.bcab.2021.101911.

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Ayinya, Gube-Ibrahim Mercy, Ibrahim Ezekiel Gube, and Gutap Satmac James. "Uptake and Bioaccumulation of Selected Heavy Metals in Selected Vegetables in Bokkos L.G.A, Plateau State." International Journal of Trend in Scientific Research and Development Volume-3, Issue-1 (December 31, 2018): 917–21. http://dx.doi.org/10.31142/ijtsrd19107.

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Al-Najare, G. A., A. A. Hantoush, L. J. M. Al-Anber, and H. T. Al-Saad. "Bioaccumulation of heavy metals in Acanthopagrus latus collected from Al-Razazah Lake, middle of Iraq." IRAQI JOURNAL OF AQUACULTURE 9, no. 1 (2012): 5–22. http://dx.doi.org/10.21276/ijaq.2012.9.1.2.

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Journal articles on the topic 'Bioaccumulation of heavy metals'

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