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Journal articles on the topic 'And water source degradation'

Author: Grafiati

Published: 7 June 2025

Last updated: 2 August 2025

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1

Chilagane, Nyemo, Papilon Mkome, Elius Chundu, et al. "Mapping and Assessing the Ecological Status of Water Sources in Mbarali River Sub catchment." Journal of Water Resources, Engineering, Management and Policy 1, no. 2 (2024): 1–11. https://doi.org/10.56542/wi.jwempo.v1.i2.a3.2024.

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Mbarali river subcatchment (MRS) is an important waterway that faces ongoing degradation due to climate change, land use change and poor institutional management which affected river flows in both quantity and quality. This study presents the findings of the cross-sectional survey conducted to identify, map and assess the ecological status of water sources in MRS. The overall objectives of this study are to provide a general understanding on the number of water sources and their spatial distribution, level of human induced pressure that detrimentally affect the quality of water sources and to

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Čizmić, Mirta, Davor Ljubas, Marko Rožman, Danijela Ašperger, Lidija Ćurković, and Sandra Babić. "Photocatalytic Degradation of Azithromycin by Nanostructured TiO2 Film: Kinetics, Degradation Products, and Toxicity." Materials 12, no. 6 (2019): 873. http://dx.doi.org/10.3390/ma12060873.

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In this paper, nanostructured TiO2 film was prepared by the by sol-gel process and dip-coating technique with titanium tetraisopropoxide as a precursor. After heat treatment at 550 °C, the deposited film was characterized by means of micro-Raman spectroscopy and atomic force microscopy (AFM). It was found that the TiO2 film consisted of only the TiO2 anatase phase and showed a granular microstructure. Photocatalytic degradation of azithromycin by using sol-gel nanostructured TiO2 film was studied to define the most effective degradation process for potential use in wastewater treatment. Differ

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Wu, Jiaxi, Haiquan Yang, Wei Yu, et al. "Effect of Ecosystem Degradation on the Source of Particulate Organic Matter in a Karst Lake: A Case Study of the Caohai Lake, China." Water 14, no. 12 (2022): 1867. http://dx.doi.org/10.3390/w14121867.

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The cycle of biogenic elements in lakes is intimately linked with particulate organic matter (POM), which plays a critical role in ecosystem restoration and the control of eutrophication. However, little is known regarding the functionality of ecosystem degradation on the source of POM in the water of a karst lake. To fill this knowledge gap, herein we compared the temporal and spatial distribution characteristics of POM prior to and after ecosystem degradation in the karst lake Caohai Lake, located in the southwest of China, and analyzed the source of POM using a combination of carbon and nit

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4

Yue, P. L., and O. Legrini. "Photochemical Degradation of Organics in Water." Water Quality Research Journal 27, no. 1 (1992): 123–38. http://dx.doi.org/10.2166/wqrj.1992.007.

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Abstract Trichloroethylene, phenol, 4-cholorophenol, catechol and a pesticide were degraded by two advanced oxidation processes: photolytic oxidation with hydrogen peroxide, andphotolytic oxidation with ozone. The reactions were studied in a batch photoreactor with a low pressure mercury lamp as the radiation source. The variation of the concentration of total organic carbon with time was measured. For the organics studied, the reaction kinetics for the reduction of total organic carbon (TOC) were found to follow a power law. The exponent of the power law varies with the initial TOC concentrat

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Aravinthan, V., T. Mino, S. Takizawa, H. Satoh, and T. Matsuo. "Sludge hydrolysate as a carbon source for denitrification." Water Science and Technology 43, no. 1 (2001): 191–99. http://dx.doi.org/10.2166/wst.2001.0047.

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External carbon sources such as methanol and acetate are applied in order to improve the denitrification efficiency in biological nitrogen removal processes. Excess sludge wasted from the treatment plants contains organic carbon that could be used as a feasible carbon source for denitrification. However, the excess sludge needs to be hydrolyzed first before being utilized as a carbon source. The objective of this research is to evaluate the biodegradability of the sludge hydrolysate obtained using alkaline, acid, autoclaved and combined solubilization methods. The experimental results suggest

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Ferreira, Fernanda Laurinda Valadares, Francielle de Cássia Coelho Vieira, Izabelle de Paula Sousa, Flávio Pimenta Figueiredo, and Leidivan Almeida Frazão. "Environmental diagnosis of water source in a Brazilian Cerrado watershed." Caderno de Ciências Agrárias 12 (September 25, 2020): 1–11. http://dx.doi.org/10.35699/2447-6218.2020.20739.

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A lack of planning characterize the most demographic occupation process in Brazil, occurring in a disorderly manner and with inappropriate occupations, resulting in damage to natural resources. This process is recurrent in the Cerrado Biome, currently the agricultural frontier of the country. Thus, the objective of this work was to identify anthropic activities and classify the conservation status in the headsprings (water sources) and surroundings areas of a watershed inserted in the Cerrado biome, besides proposing measures to prevent and control the different degradation processes. From Feb

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Boroughani, Mahdi, Fahimeh Mirchooli, Mojtaba Hadavifar, and Stephanie Fiedler. "Mapping land degradation risk due to land susceptibility to dust emission and water erosion." SOIL 9, no. 2 (2023): 411–23. http://dx.doi.org/10.5194/soil-9-411-2023.

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Abstract. Land degradation is a cause of many social, economic, and environmental problems. Therefore identification and monitoring of high-risk areas for land degradation are necessary. Despite the importance of land degradation due to wind and water erosion in some areas of the world, the combined study of both types of erosion in the same area receives relatively little attention. The present study aims to create a land degradation map in terms of soil erosion caused by wind and water erosion of semi-dry land. We focus on the Lut watershed in Iran, encompassing the Lut Desert that is influe

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Uyeno, Yutaka, and Akito Matsumoto. "Changes in bacterial composition during in vitro oil degradation experiments using activated sludge from different sources." Water Practice and Technology 14, no. 4 (2019): 931–36. http://dx.doi.org/10.2166/wpt.2019.076.

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Abstract We monitored bacterial compositional changes during in vitro food oil degradation experiments, wherein activated sludge (AS) from different sources was employed as seed. Two AS samples were collected from different aeration processes at the same plant and one sample was collected from a different plant; these were used for the degradation of synthetic wastewater containing commercial food oil as the sole carbon source. A 16S rRNA gene-based next generation sequencing technique was applied to study the bacterial community in the seed AS samples and resultant water after in vitro degrad

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9

Jia, Ling, Chang Hai Qin, and Hong Gan. "Method for Cost Evaluation of the Environmental Degradation of Water." Advanced Materials Research 361-363 (October 2011): 1627–33. http://dx.doi.org/10.4028/www.scientific.net/amr.361-363.1627.

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Evaluation of the cost of the environmental degradation of water is one of the difficulties in the System of Environmental-Economic Accounting for Water. In this study, the concept of the cost of the environmental degradation of water was analyzed for the first time. Based on a discussion of evaluation methods related to environmental degradation of water at home and abroad, and the characteristics of the cost of the environmental degradation of water, a set of relatively complete and operational methods to evaluate the cost of the environmental degradation of water was proposed. The calculati

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McDonald, Robert I., Katherine F. Weber, Julie Padowski, Tim Boucher, and Daniel Shemie. "Estimating watershed degradation over the last century and its impact on water-treatment costs for the world’s large cities." Proceedings of the National Academy of Sciences 113, no. 32 (2016): 9117–22. http://dx.doi.org/10.1073/pnas.1605354113.

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Urban water systems are impacted by land use within their source watersheds, as it affects raw water quality and thus the costs of water treatment. However, global estimates of the effect of land cover change on urban water-treatment costs have been hampered by a lack of global information on urban source watersheds. Here, we use a unique map of the urban source watersheds for 309 large cities (population > 750,000), combined with long-term data on anthropogenic land-use change in their source watersheds and data on water-treatment costs. We show that anthropogenic activity is highly correl

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Chen, Xiao Guo, Rui Ting Yan, Xiao Yan Wu, and Yue Hu. "Solar Photocatalytic Degradation of MCRR by Ag-Doped TiO₂ Films." Advanced Materials Research 287-290 (July 2011): 1811–14. http://dx.doi.org/10.4028/www.scientific.net/amr.287-290.1811.

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The photocatalytic degradation of MCRR has been investigated using Ag-doped TiO2 films as photocatalyst and sunlight as irradiation source. Ag-doped TiO2 films can significantly accelerate the degradation of MCRR both in distilled water and in lake water, although the efficiency in lake water was not good as in distilled water. The photocatalytic activity was affected by the number of coating cycles and the best performance was found in films prepared with five coatings. Solution pH can also significantly influence the photocatalytic degradation of MCRR, and acidic pH was more efficient for th

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Chang, Jiaxuan, Xuefeng Sang, Yun Zhang, et al. "A Novel Sensitivity Analysis Framework for Quantifying Permafrost Impacts on Runoff Variability in the Yangtze River Source Region." Sustainability 17, no. 4 (2025): 1570. https://doi.org/10.3390/su17041570.

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In the context of global climate change, understanding cryosphere degradation and its impact on water resources in alpine regions is crucial for sustainable development. This study investigates the relationship between permafrost degradation and runoff variations in the Source Region of the Yangtze River (SRYR), a critical water tower for sustainable water supply in Asia. We propose a novel method for assessing permafrost sensitivity, which establishes the correlation between cryosphere changes and hydrological responses, contributing to sustainable water resource management. Our research quan

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13

Luo, Nan, Changying Hu, Weiyu Li, Tao Xie, HuiLi Gong, and Rui Liu. "The effect of ecological restoration based artificial reoxygenation on water quality Improvement of urban river water." MATEC Web of Conferences 246 (2018): 02037. http://dx.doi.org/10.1051/matecconf/201824602037.

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Urban river pollution sources such as Combined Sewer Overflows (CSOs) or Illegally Discharging of Industrial Waste (IDIW) are generally hard to control on-site and cause serious water quality degradation problems across the nation. Therefore developing effective in-situ remediation techniques for urban rivers is of great interest. In this research we combined river reoxygenation, artificial floating island and microbial agents technologies (O-AFI-MA) to developed a comprehensive in-situ remediation technique and obtained water quality data from Sunhe River case study to evaluate its effectiven

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Izaguirre, G., R. L. Wolfe, and E. G. Means. "Bacterial Degradation of 2-Methylisoborneol." Water Science and Technology 20, no. 8-9 (1988): 205–10. http://dx.doi.org/10.2166/wst.1988.0244.

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2-Methylisoborneol (MIB) is a musty-odored compound occurring in natural waters that is difficult to remove by conventional water treatment methods. Biodegra-dation may be an alternative for its removal from drinking water. Studies were undertaken to determine the conditions enhancing MIB degradation and to isolate and identify the bacteria responsible. MIB degraders were enriched using mg/l levels of the compound, in a defined mineral medium, inoculated with water and sediment samples from reservoirs where MIB is seasonally produced. Cultures that degraded MIB were isolated and enumerated. De

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15

Rodrigues, Francisco de Assis, and Sueli Yoshinaga Pereira. "Problems of groundwater management and the need for its inclusion in the Brazilian national model of integrated water resources management." Water Policy 10, no. 2 (2008): 165–71. http://dx.doi.org/10.2166/wp.2008.038.

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This paper discusses certain issues related to groundwater management within the context of the Brazilian national policy for water resources management. In order to investigate the importance of this water supply source, we interviewed groundwater users in the city of São Paulo, where some 57% of the total water supply comes from this source, and surveyed some of the factors affecting the use of this alternative. These include the existence of a good supply of groundwater, an inadequate public water supply system unable to meet user demands, the degradation of fresh water sources and the redu

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Feng, Kaiqing, Jiandong Zhang, Lili Gao, and Qi Tian. "Biodegradation of alicyclic amines by a newly isolated hypersaline tolerant strain Paenarthrobacter sp. TYUT067." Water Science and Technology 83, no. 9 (2021): 2160–68. http://dx.doi.org/10.2166/wst.2021.130.

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Abstract Alicyclic amines are widely used in several types of industries, and considerable attention has been devoted to possible environmental pollution by alicyclic amines in hypersaline industrial wastewater. In this study, a new hypersaline tolerant bacterial TYUT067 capable of growing in liquid basal salt medium with cyclohexylamine (CHAM) as the sole carbon source and energy source, was isolated from soil, and discovered with highly efficient CHAM degrading ability. The strain TYUT067 was identified as Paenarthrobacter sp. based on 16S rDNA gene sequence, and its degradation characterist

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17

Luiz, D. B., A. K. Genena, H. J. José, R. F. P. M. Moreira, and H. Fr Schröder. "Tertiary treatment of slaughterhouse effluent: degradation kinetics applying UV radiation or H2O2/UV." Water Science and Technology 60, no. 7 (2009): 1869–74. http://dx.doi.org/10.2166/wst.2009.583.

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In some Brazilian regions, surface water has become scarce, e.g. semi arid climate areas and densely populated and industrial areas, where water over-exploitation and/or fluvial pollution has been more common. Advanced oxidative processes (AOP) provide treated water as a source of reuse water even with the characteristics of drinking water enabling water reuse practices also in food industries. The secondary wastewater of a slaughterhouse was the water source for a tertiary treatment study evaluating the kinetics of the photo-induced degradation of color and UV254 under UV radiation with and w

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Trigo, Carolina B., Andrés Tálamo, Mauricio M. Núñez-Regueiro, et al. "A woody plant community and tree-cacti associations change with distance to a water source in a dry Chaco forest of Argentina." Rangeland Journal 39, no. 1 (2017): 15. http://dx.doi.org/10.1071/rj16014.

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In semiarid regions, livestock is concentrated around water sources generating a piosphere pattern (gradients of woody vegetation degradation with increasing proximity to water). Close to the water source, livestock may affect the composition, structure and regeneration strategies of woody vegetation. We used the proximity from a water source as a proxy of grazing pressure. Our objectives were (1) to compare woody vegetation attributes (richness, diversity, species composition, density and basal area) and ground cover between sites at two distances to a water source: near (higher grazing press

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19

Wu, Hui, Shanshan Guo, Ping Guo, Baoying Shan, and Yan Zhang. "Agricultural water and land resources allocation considering carbon sink/source and water scarcity/degradation footprint." Science of The Total Environment 819 (May 2022): 152058. http://dx.doi.org/10.1016/j.scitotenv.2021.152058.

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Murillo, R., J. Sarasa, M. Lanao, and J. L. Ovelleiro. "Degradation of chlorpyriphos in water by advanced oxidation processes." Water Supply 10, no. 1 (2010): 1–6. http://dx.doi.org/10.2166/ws.2010.777.

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The degradation of chlorpyriphos by different advanced oxidation processes such as photo-Fenton, TiO2, TiO2/H2O2, O3 and O3/H2O2 was investigated. The photo-Fenton and TiO2 processes were optimized using a solar chamber as light source. The optimum dosages of the photo-Fenton treatment were: [H2O2]=0.01 M; [Fe3 + ]=10 mg l−1; initial pH = 3.5. With these optimum conditions total degradation was observed after 15 minutes of reaction time. The application of sunlight was also efficient as total degradation was achieved after 60 minutes. The optimum dosage using only TiO2 as catalyst was 1,000 mg

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Li, Pu, Xiayu Chen, Haibo Niu, et al. "An Advanced PMF Model Based on Degradation Process for Pollutant Apportionment in Coastal Areas." Water 14, no. 11 (2022): 1823. http://dx.doi.org/10.3390/w14111823.

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With increasing stress posed to the marine ecosystem and coastal communities, prevention and control of coastal pollution becomes urgent and important, in which the identification of pollution sources is essential. Currently, the pollutant source apportionment in coastal areas is mainly based on receptor models, such as the positive matrix factorization (PMF) model. Nevertheless, these models still lack consideration of the changes of pollutant behaviors (e.g., the degradation of pollutants) which cause the differences in pollutant compositions. Subsequently, the source apportionment via recep

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Njurumana, G. N., E. Pujiono, M. M. da Silva, and O. K. Oematan. "Ecological performance of local initiatives on water resources management in Timorese communities, Indonesia." IOP Conference Series: Earth and Environmental Science 914, no. 1 (2021): 012031. http://dx.doi.org/10.1088/1755-1315/914/1/012031.

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Abstract Indonesia is one of the countries under the threat of a water crisis. A total of 106 districts from 16 provinces, including East Nusa Tenggara, experienced drought and clean water crisis of 1.50 billion m3 year−1. This involves ecological characteristics accumulation of semiarid regions, degradation of forest resources, and increased critical land. Mitigation research on a watershed scale provides an understanding of the strong relationship between land degradation and water crisis. However, specific information on biophysical spring sources in semi-arid ecosystems is still very limit

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Owa, F. W. "Water Pollution: Sources, Effects, Control and Management." International Letters of Natural Sciences 8 (January 2014): 1–6. http://dx.doi.org/10.18052/www.scipress.com/ilns.8.1.

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Human activities including industrialization and agricultural practices contributed immensely in no small measure to the degradation and pollution of the environment which adversely has an effect on the water bodies (rivers and ocean) that is a necessity for life. This paper tries to discuss basically what water pollution is and equally to address the source, effect control and water pollution management as a whole. Some recommendations such as introduction of environmental education were mentioned.

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Owa, F. W. "Water Pollution: Sources, Effects, Control and Management." International Letters of Natural Sciences 8 (January 15, 2014): 1–6. http://dx.doi.org/10.56431/p-gk4d9j.

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Human activities including industrialization and agricultural practices contributed immensely in no small measure to the degradation and pollution of the environment which adversely has an effect on the water bodies (rivers and ocean) that is a necessity for life. This paper tries to discuss basically what water pollution is and equally to address the source, effect control and water pollution management as a whole. Some recommendations such as introduction of environmental education were mentioned.

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RAJ, SHARMILA, SHUBHIKSHA M., and GOPINATH B. "EXPLORING PEDALIUM MUREX AS A SOURCE FOR SUSTAINABLE BIOPLASTICS IN FOOD PACKAGING." Asian Journal of Microbiology, Biotechnology & Environmental Sciences 27, no. 3-4 (2025): 246–50. https://doi.org/10.53550/ajmbes.2025.v27i03-04.017.

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Synthetic polymers predominantly constitute packaging materials; however, they significantly contribute to environmental degradation. Although plasticizers serve to enhance the properties of polymers, traditional petroleum-based variants exacerbate ecological detriment. This investigation fabricated biofilms utilizing poly L-lactic acid (PLA) in conjunction with a bio plasticizer derived from Pedalium murex. The plant extract underwent transesterification to yield glycerol (employed as a plasticizer) and biodiesel (extracted as a byproduct). Chemical and mechanical extraction methodologies wer

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Kawasaki, Shinichi, Yusuke Okada, Shuai Yuan, Kohsuke Mori, and Hiromi Yamashita. "Photocatalytic Degradation of Organics Diluted in Water Using TiO₂ Loaded on Fluoride-Modified Mesoporous Silica." Materials Science Forum 544-545 (May 2007): 115–18. http://dx.doi.org/10.4028/www.scientific.net/msf.544-545.115.

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The synthesis of the hydrophobic mesoporous silica MS(F) was performed using tetraethyl orthosilicate, triethoxyfluorosilane as the source of the fluoride and dodecylamine as templates. The TiO2 loaded on the hydrophobic MS(F) (TiO2/MS(F)) exhibited the efficient photocatalytic performance for the degradation of alcohols (iso-butanol) diluted in water. The photocatalytic reactivity for the degradation increased with increasing the content of fluoride ions on these photocatalysts. The hydrophobic mesoporous surface is suitable as the photocatalytic reaction field for the degradation of organic

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Zhang, Wei Ling, Jian Fei Zhang, Zheng Li, and Ji Xian Gong. "The Isolation, Identifition and Fermentation of Bacillus for Degradation of Terephthalic Acid." Advanced Materials Research 183-185 (January 2011): 942–46. http://dx.doi.org/10.4028/www.scientific.net/amr.183-185.942.

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Terephthalic acid is one of the main contaminations released by PET processing and it's toxic to environment and animals. Useful microbe must be found out to biodegrade it. Bacillus came from waste water may be powerful to biodegrade it, so the waste water were used as the sources of bacillus. The microbe was enriched in enrichment medium first and then isolated on selective medium containing terephthalic acid as the only carbon source to get the microbe suitable for degradation. The purified microbe was used to biodegrade terephthalic acid at different temperature to find out its suitable liv

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Chattaraj, Arghya, T. Palani Selvam, and D. Datta. "MONTE CARLO-BASED INVESTIGATION OF MICRODOSIMETRIC DISTRIBUTION OF HIGH ENERGY BRACHYTHERAPY SOURCES." Radiation Protection Dosimetry 187, no. 1 (2019): 115–28. http://dx.doi.org/10.1093/rpd/ncz148.

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Abstract FLUKA-based Monte Carlo calculations were carried out to study microdosimetric distributions in air and in water for encapsulated high energy brachytherapy sources (60Co, 137Cs, 192Ir and 169Yb) by simulating a Tissue Equivalent Proportional Counter (Model LET1/2) having sensitive diameter of 1. 27 cm for a site size of 1 μm. The study also included microdosimetric distributions of bare sources. When the sources are in air, for a given source, the source geometry does not affect the y¯F and y¯D values significantly. When the encapsulated 192Ir, 137Cs and 60Co sources are in water, y¯F

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Madan, Raj BHANADARI, and ARYAL Kishor. "Status of Water Sources and Its Impact on Livelihood Practices in Sardhukhola Watershed of Eastern Nepal (Sunsari)." Agriculture and Forestry Journal 4, no. 1 (2020): 19–31. https://doi.org/10.5281/zenodo.3837646.

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Watershed resources are the foundation of ecosystem integrity and livelihoods of mountain people. In this regard, this study entitled "status of water sources and its impact on livelihood practices in the Sardhukhola watershed of Eastern Nepal" was carried out to understand the status of water resources and its impact on rural livelihood practices. This study was conducted in Sardhukhola Watershed of Sunsari district. This research was conducted to know the present status of the water source around Sardhu River, including its trend of availability, human interventions and it’s

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Xu, Fang, Peng Zhang, Yingxian He, et al. "Seasonal Self-Purification Process of Nutrients Entering Coastal Water from Land-Based Sources in Tieshan Bay, China: Insights from Incubation Experiments." Journal of Marine Science and Engineering 13, no. 6 (2025): 1133. https://doi.org/10.3390/jmse13061133.

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Nutrients function as essential biological substrates for coastal phytoplankton growth and serve as pivotal indicators in marine environmental monitoring. The intensification of land-based nutrient sources inputs has exacerbated eutrophication in Chinese coastal water, while mechanistic understanding of differential self-purification processes among distinct land-based source nutrients (river source, domestic source, aquaculture source, and industrial source) remains limited, constraining accurate assessment of bay’s self-purification capacity. This study conducted incubation experiments in Ti

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Zhang, P., and L. Jian. "Ozone-enhanced photocatalytic degradation of natural organic matter in water." Water Supply 6, no. 3 (2006): 53–61. http://dx.doi.org/10.2166/ws.2006.730.

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Ozone-enhanced photocatalytic degradation of macromolecular natural organic matter (NOM) in drinking water source was investigated. The influences of ozone dosage, retention time and bicarbonate concentration on the NOM degradation rate were studied. The change of molecular weight distribution of NOM caused by ozone-enhanced photocatalysis was analysed, as well as the degradation rate of NOM with different molecular weight (MW). It was shown that ozone-enhanced photocatalysis was much better for NOM degradation than sole ozonation or photocatalysis. Increase of both ozone dosage and retention

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Sativa, Siti Oryza, Muhammad Ali Zulfikar, Ervin Tri Suryandari, and Muhammad Nasir. "Effect of Composite Composition in Nanofiber for Degradation of Humic Acid Solution." Advanced Materials Research 1162 (April 2021): 87–92. http://dx.doi.org/10.4028/www.scientific.net/amr.1162.87.

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One of the basic needs for human is clean water. Many lowlands and marshy areas in larger islands in Indonesia such as Sumatra and Kalimantan are the source of peat water. This type of water is harmful for people living in such areas and it cannot be used directly for drinking and living. According to the standard quality of good water, peat water does not meet the requirements as a source of water for daily life. Peat water is acidic, red-brownish coloured, and it contains higher organic matters especially humic acid and its derivatives. Photocatalysis process is one of the promising way to t

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Davis, E., V. H. Remenda, and E. K. Sauer. "Quality Degradation in Waters Undergoing Interbasin Transfer." Water Quality Research Journal 23, no. 3 (1988): 408–23. http://dx.doi.org/10.2166/wqrj.1988.030.

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Abstract The Saskatchewan River system is the main source of good quality water in the Western Interior Sedimentary Basin which forms the populated and agricultural area of the prairie region of Western Canada. Water from this river system has in the past been diverted at many points into local drainage areas where water shortages existed. It is expected that in the future more diversion schemes will be initiated to transport Saskatchewan River water to the water deficient areas of the Prairies. There is evidence that the quality of water flowing into diversion schemes utilizing existing drain

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Li, Bo, Hulong Liu, Xiaona Liu, et al. "Naphthalene Enhances Polycyclic Aromatic Hydrocarbon Biodegradation by Pseudomonas aeruginosa in Soil and Water: Effect and Mechanism." Water 16, no. 17 (2024): 2537. http://dx.doi.org/10.3390/w16172537.

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Bioremediation is a promising technique owing to its effectiveness, low cost, and environmental friendliness. Previous studies have focused on the degradation efficiency of polycyclic aromatic hydrocarbons (PAHs) in soil and water. However, the expression of PAH-catabolic genes in organisms involved in the degradation process has been rarely and unsystematically reported. In this study, a PAH-degrading strain—Pseudomonas aeruginosa (PQ249631)—was successfully isolated from coking-contaminated soil and used for PAH degradation in soil and water. Furthermore, the degradation of PAHs (naphthalene

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Wang, Jianguang, Haifeng Fang, Shiyi Li, and Hailan Yu. "Delving into the Impacts of Different Easily Degradable Carbon Sources on the Degradation Characteristics of 2,4,6-Trichlorophenol and Microbial Community Properties." Water 16, no. 7 (2024): 974. http://dx.doi.org/10.3390/w16070974.

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In chlorophenol wastewater treatment, adding easily degradable carbon sources, such as methanol, ethanol, sodium acetate, and sodium propionate, significantly improves the chlorophenol removal efficiency. This study systematically compares these conventional carbon sources in different sequencing batch reactors to understand their specific effects on both 2,4,6-trichlorophenol (2,4,6-TCP) degradation efficiency and microbial abundance. In a 35-day experiment, as a carbon source, ethanol exhibited a lower 2,4,6-TCP degradation concentration (77.56 mg/L) than those of methanol, sodium acetate, a

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Natarajan, Kalithasan, Thillai Sivakumar Natarajan, Rukshana I. Kureshy, Hari C. Bajaj, Wan Kuen Jo, and Rajesh J. Tayade. "Photocatalytic H₂ Production Using Semiconductor Nanomaterials via Water Splitting – An Overview." Advanced Materials Research 1116 (July 2015): 130–56. http://dx.doi.org/10.4028/www.scientific.net/amr.1116.130.

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Heterogeneous semiconductor based photocatalytic hydrogen (H2) production by water splitting is one of the widely recognized promising sustainable technologies to deliver clean energy for future energy demands. The present review article mainly focus on the overview of principle of water splitting, different semiconductor nanomaterials used for photocatalytic water splitting in the presence of UV and solar light irradiation, role of sacrificial reagents, simultaneous degradation of pollutants and H2 production reaction, strategy for development of efficient photocatalyst for H2 production. Fur

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Locas, Annie, Christine Barthe, Benoit Barbeau, Annie Carrière, and Pierre Payment. "Virus occurrence in municipal groundwater sources in Quebec, Canada." Canadian Journal of Microbiology 53, no. 6 (2007): 688–94. http://dx.doi.org/10.1139/w07-034.

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A 1 year study was undertaken on groundwater that was a source of drinking water in the province of Quebec, Canada. Twelve municipal wells (raw water) were sampled monthly during a 1 year period, for a total of 160 samples. Using historic data, the 12 sites were categorized into 3 groups: group A (no known contamination), group B (sporadically contaminated by total coliforms), and group C (historic and continuous contamination by total coliforms and (or) fecal coliforms). Bacterial indicators (total coliform, Escherichia coli , enteroccoci), viral indicators (somatic and male-specific coliphag

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Bathe, S., T. V. K. Mohan, S. Wuertz, and M. Hausner. "Bioaugmentation of a sequencing batch biofilm reactor by horizontal gene transfer." Water Science and Technology 49, no. 11-12 (2004): 337–44. http://dx.doi.org/10.2166/wst.2004.0875.

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Bioaugmentation by introduction of catabolic genes residing on mobile genetic elements into the microbial community of a soil or wastewater environment might be an alternative to bioaugmentation by addition of bacterial cells with chromosomally encoded catabolic genes. This study investigates the possibility to enhance degradation of the xenobiotic model compound 2,4-dichlorophenoxyacetic acid in a sequencing batch biofilm reactor (SBBR) by using the conjugative plasmid pJP4 carrying genes for 2,4-D degradation. After introduction of a plasmid donor strain to a lab-scale SBBR operated without

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Zhang, Daqi, Lirui Ren, Wenjing Li, et al. "The Appropriate Particle Size of Dazomet Can Ensure the Soil Fumigation Effect from the Source." Agriculture 12, no. 11 (2022): 1832. http://dx.doi.org/10.3390/agriculture12111832.

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Dazomet (DZ) is a soil fumigant that has been used for decades at many countries, however it was reported to have caused phytotoxicity and reduced crop yield in many countries. In this experiment, in order to clarify whether the diameter of DZ is related to phytotoxicity, this research investigated the degradation rate of DZ with different diameter ranges under three soil types held at 15, 20 or 30% soil water content at 4, 15, 25 or 37 °C, and monitored concentrations of methyl isothiocyanate (MITC) produced when Shunyi soil was fumigated with DZ using the different particle sizes ranges. Whe

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Lee, Youn-Jun, Jong-Min Lee, Chang-Gu Lee, Seong-Jik Park, and Eun Hea Jho. "Photodegradation Behavior of Agricultural Antibiotic Oxytetracycline in Water." Water 14, no. 21 (2022): 3379. http://dx.doi.org/10.3390/w14213379.

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Due to their overuse in agriculture, antibiotics are discharged into the aquatic environment, which poses a threat to human health and aquatic organisms. The agricultural antibiotic oxytetracycline (OTC) persists in aquatic media for a long time due to its resistance to biological degradation. Photolysis is a main pathway for its degradation in the natural environment and wastewater treatment, and thus, the photolysis of OTC should be investigated. In this study, the effects of reaction conditions such as the irradiation conditions, the initial OTC concentration, and the water matrix on OTC ph

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Kochetkov, V. V., A. A. Medvedkov, E. A. Kuzmenko, and O. M. Nessar. "“Water Wars” as a Source and Instrument of International Conflicts." Russia & World: Sc. Dialogue, no. 4 (January 2, 2024): 118–33. http://dx.doi.org/10.53658/rw2023-3-4(10)-118-133.

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Water resource shortage is one of the global problems of our time. The article presents the results of studies of international conflicts due to the lack of fresh water, and analyzes the possible consequences of the growing crisis that may affect the world political system. The prerequisites for the emergence of water conflicts on the political map of the world and the most informative indicators that make it possible to judge the conflict potential between countries (the share of transit river flow, the level of use of water resources and the degree of climate aridity) are considered. The exi

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Sakti, Anjar Dimara, Adam Irwansyah Fauzi, Felia Niwan Wilwatikta, et al. "Multi-Source Remote Sensing Data Product Analysis: Investigating Anthropogenic and Naturogenic Impacts on Mangroves in Southeast Asia." Remote Sensing 12, no. 17 (2020): 2720. http://dx.doi.org/10.3390/rs12172720.

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This study investigated the drivers of degradation in Southeast Asian mangroves through multi-source remote sensing data products. The degradation drivers that affect approximately half of this area are unidentified; therefore, naturogenic and anthropogenic impacts on these mangroves were studied. Various global land cover (GLC) products were harmonized and examined to identify major anthropogenic changes affecting mangrove habitats. To investigate the naturogenic factors, the impact of the water balance was evaluated using the Normalized Difference Vegetation Index (NDVI), and evapotranspirat

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Dasgupta, Debdeep, Ritabrata Ghosh, and Tapas K. Sengupta. "Biofilm-Mediated Enhanced Crude Oil Degradation by Newly Isolated Pseudomonas Species." ISRN Biotechnology 2013 (March 5, 2013): 1–13. http://dx.doi.org/10.5402/2013/250749.

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The bioavailability of organic contaminants to the degrading bacteria is a major limitation to efficient bioremediation of sites contaminated with hydrophobic pollutants. Such limitation of bioavailability can be overcome by steady-state biofilm-based reactor. The aim of this study was to examine the effect of such multicellular aggregation by naturally existing oil-degrading bacteria on crude oil degradation. Microorganisms, capable of utilizing crude oil as sole carbon source, were isolated from river, estuary and sea-water samples. Biochemical and 16S rDNA analysis of the best degraders of

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Mayank, Chaurasia. "Analytical review on Biodegradation of Plastics." eLifePress 1, no. 1 (2020): 1–8. https://doi.org/10.5281/zenodo.4294397.

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In some areas of the world, people are aware of the impact of plastic on the environment and implementing the strict rule not to use plastic. With the new advancement in Research and Development, a new concept of biodegradable plastics is introduced. It has a wide range of applications in many sectors. In this study, the biodegradation of various types of plastic using different bacteria was studied. Bacteria convert the polymer molecule into small water-soluble molecules like oligomers and dimers and then utilize as carbon and energy source and thus degradation of the polymer takes place.

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Basik, Ann, Jean-Jacques Sanglier, Chia Yeo, and Kumar Sudesh. "Microbial Degradation of Rubber: Actinobacteria." Polymers 13, no. 12 (2021): 1989. http://dx.doi.org/10.3390/polym13121989.

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Rubber is an essential part of our daily lives with thousands of rubber-based products being made and used. Natural rubber undergoes chemical processes and structural modifications, while synthetic rubber, mainly synthetized from petroleum by-products are difficult to degrade safely and sustainably. The most prominent group of biological rubber degraders are Actinobacteria. Rubber degrading Actinobacteria contain rubber degrading genes or rubber oxygenase known as latex clearing protein (lcp). Rubber is a polymer consisting of isoprene, each containing one double bond. The degradation of rubbe

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Tao, Y., Z. L. Cheng, K. E. Ting, and X. J. Yin. "Photocatalytic Degradation of Phenol Using a Nanocatalyst: The Mechanism and Kinetics." Journal of Catalysts 2013 (October 10, 2013): 1–6. http://dx.doi.org/10.1155/2013/364275.

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The study of photocatalytic degradation of phenol was exploited with nano-ZnO as immobilized photocatalysts in a laboratory scale photocatalytic reactor. The photocatalytic degradation mechanism and kinetics of phenol in water were studied using the solid-phase microextraction (SPME) technique. Based on optimized headspace SPME conditions, phenol in water was first extracted by the fibre, which was subsequently inserted into an aqueous system with immobilized photocatalysts (nano-ZnO) exposed to an irradiation source (i.e., ultraviolet A (UVA) lamps). After different irradiation times (5–80 mi

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Wang, Kai, Xiaojiao Yu, Zongbin Liu, et al. "Study on the Photocatalytic Degradation of Tetracycline Using SrBi₄Ti₄O₁₅ Nano Photocatalyst Prepared by Electrospinning Method." Journal of Physics: Conference Series 2610, no. 1 (2023): 012056. http://dx.doi.org/10.1088/1742-6596/2610/1/012056.

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Abstract In this work, an efficient SrBi4Ti4O15 photocatalyst has been successfully synthesized by the electrospinning method. The photocatalytic activity of SrBi4Ti4O15 was estimated by TC as a simulated pollutant. The results of photocatalytic degradation experiments show that the factors such as catalyst dosage, initial concentration, inorganic salts, and water source can all affect the degradation efficiency of SrBi4Ti4O15 on TC. The active species capture test confirmed that h+ and •O2 - play a key role in the TC degradation progress. This work proposed a new direction for designing effic

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Zhang, Yan, Xuxiang Zhang, Bing Wu, et al. "Degradation of benzo(a)pyrene in Yangtze River source water with functional strains." Ecotoxicology 18, no. 6 (2009): 742–47. http://dx.doi.org/10.1007/s10646-009-0344-z.

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Wang, Jianguang, and Shiyi Li. "Exploring 2,4,6-Trichlorophenol Degradation Characteristics and Functional Metabolic Gene Abundance Using Sludge Fermentation Broth as the Carbon Source." Water 15, no. 24 (2023): 4279. http://dx.doi.org/10.3390/w15244279.

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The use of sludge fermentation broth (FB) as a co-metabolic carbon source for treating 2,4,6-trichlorophenol (2,4,6-TCP) wastewater is a novel strategy. The key to the feasibility of this strategy is whether the FB can promote the growth of functional microorganisms that are capable of degrading 2,4,6-TCP. This study focused on long-term acclimatized sludge and investigated the impact of key operating parameters such as the sludge FB concentration and the influent concentration of 2,4,6-TCP on the removal efficiency of chlorophenol. The research findings revealed that when the influent concent

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Friesen, Ken J., Taha M. El-Morsi, and Alaa S. Abd-El-Aziz. "Photochemical oxidation of short-chain polychlorinatedn-alkane mixtures usingH2O2/UV and the photo-Fenton reaction." International Journal of Photoenergy 6, no. 2 (2004): 81–88. http://dx.doi.org/10.1155/s1110662x04000121.

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The photochemical oxidation of a series of short-chain polychlorinatedn-alkane (PCA) mixtures was investigated usingH2O2/UV and modified photo-Fenton conditions (Fe3+/H2O2/UV) in both Milli-Q and lake water. All PCA mixtures, including chlorinated (Cl5toCl8) decanes, undecanes, dodecanes and tridecanes degraded in 0.02 MH2O2/UV at pH 2.8 in pure water, with80±4%disappearance after 3 h of irradiation using a 300 nm light source. Degradation was somewhat enhanced under similar conditions but in natural water. The modified photo-Fenton system was more effective in degrading PCAs, with 72% and 80%

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