Distribution and ecological risks of heavy metals in river sediments and overlying water in typical mining areas of China

Chen, Ming; Li, Feng-guo; Tao, Meixia; Hu, Linlin; Shi, Yanli; Liu, Youcun

doi:10.1016/j.marpolbul.2019.07.029

Cited by 57 publications

(29 citation statements)

References 16 publications

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“…Only one significant difference was found in the concentration of Ni between MV-4 and the remaining drill holes. The measured values were in accordance with those found by Olafisoye et al and Chen et al [30,31], who consider Ni, Zn and Cr concentrations <0.1 mg L -1 acceptable and not representing a profound danger to the surrounding environment. Furthermore, it can be assumed that the number of leachates will decrease with the shrinking area of the active landfill part (Figure 2), which was reduced by more than 5% in the period from 2000 to 2014.…”

Section: General Evaluation Of Parameters Measured In Groundwater and Leachatesupporting

confidence: 91%

Chemical Composition and Hazardous Effects of Leachate from the Active Municipal Solid Waste Landfill Surrounded by Farmlands

et al. 2020

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Landfill leachates are potentially harmful to the environment and to human health. The objective of this study was to characterize leachates in order to analyze whether a relationship exists between the stored waste and the composition of leachates, and to detect possible leakages of pollutants into the environment. To achieve these objectives, field data, Global Positioning System data and physico-chemical data were used. Biological tests are becoming increasingly popular in determining leachate toxicity; therefore, two toxicity tests were performed with the seeds of white mustard (Sinapis alba L.) and duckweed (Lemna minor L.). Leachates were sampled from the leachate pond. Groundwater quality was monitored by using drill holes. The research and analysis carried out are important to determine their potential impact on agricultural areas located near the landfill. Demonstrably increased (P < 0.05) concentrations of heavy metals were detected only in the leachate pond which closes the landfill body, where it links up with the landfill insulation layer. Water sampled from drill holes reaching into groundwater was not contaminated. The results showed that the leachates did not leak outside the landfill. Nevertheless, they were found to be phytotoxic. Both toxicity tests showed that the increasing amount of leachates resulted in the increasing growth inhibition of the tested plants. The proper handling of leachates should have been ensured.

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Section: General Evaluation Of Parameters Measured In Groundwater and Leachatesupporting

confidence: 91%

Chemical Composition and Hazardous Effects of Leachate from the Active Municipal Solid Waste Landfill Surrounded by Farmlands

et al. 2020

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“…The other sites are in a state of moderate degree of contamination by U (1 ≤ CF < 3). The potential ecological risk index method (RI) has been widely used in ecological risk assessment of the pollution of surface sediments and soils [38]. As shown in Table 3 E values are all lower than 40 except for Cd and U, which indicates that there might be slight risks of these metals in river sediments.…”

Section: Assessment Of Metal Pollution In Sedimentsmentioning

confidence: 99%

“…The potential ecological risk index method (RI) has been widely used in ecological risk assessment of the pollution of surface sediments and soils [38]. As shown in Table 3, the potential ecological risks (E i r ) of potentially toxic metals in surface sediments can be listed in the order of Cd > U > Cr > Cu > Pb.…”

Section: Assessment Of Metal Pollution In Sedimentsmentioning

confidence: 99%

Characteristics and Assessment of Toxic Metal Contamination in Surface Water and Sediments Near a Uranium Mining Area

Gao

Liu

et al. 2020

IJERPH

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Concentrations of potentially toxic metals including Cd, Cu, Pb, Cr, U, Th in surface water and sediment samples collected from a river were analyzed to assess the contaminations, distribution characteristics, and sources of these metals. The contents of the metals were lower than the standard levels set by World Health Organization (WHO) for drinking water. However, U and Th contents were far beyond the background values of surface water. The concentrations of Cd, Cr, and U in sediments were higher than the background values and the Probable Effect Level (PEL) of sediment quality guidelines (SQGs) which may result in high potential harmful biological effects to aquatic ecosystems. Based on the contamination factor (CF), geo-accumulation index (Igeo), and potential ecological risk index (RI), Cd, Cr, and U were considered to be the metals that mainly contribute to the contamination of sediments. The calculation results also indicated that the sites adjacent to the uranium ore field were highly polluted. Results of cluster analysis, principal component analysis, and correlation analysis revealed that Cr, Pb, U, and Th were highly correlated with each other. These metals mainly originated from both anthropogenic sources and natural processes, especially emissions from uranium mining and quarrying, whereas Cd mostly came from anthropogenic sources (agricultural activities) of the upper reaches of the river.

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“…Heavy metals can be released through a series of physical, chemical and biological processes and entered into interstitial and overlying water, resulting in "secondary contamination" (Zhang et al, 2018;Yang et al, 2016). Previous studies show HMs in sediments mainly derive from the long-term effects of natural factors and human production activities including mining activities, agriculture fields, and atmospheric deposition (Chen et al, 2019;Kang et al, 2019). When environmental conditions change, these sediments can also be potential sources of HMs for various aquatic organisms, allowing HMs to enter the food chain (Liu et al, 2020;Zhuang et al, 2019), leading to serious health threat to benthos, aquatic plants and animals, and human (Chon et al, 2012;Yao et al, 2006), due to the high toxicity, non-degradability of HMs to organisms .…”

Section: Introductionmentioning

confidence: 99%

Heavy Metals and Arsenic in Sediments of Xinfengjiang Reservoir in South China: Levels, Source Identification and Health Risk Assessment

Li³

et al. 2020

Appl Env Biotechnol

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Xinfengjiang Reservoir (XFJR) is the largest drinking water source in the southern China, and plays a vital role in supporting the development of China's Pearl River delta. The levels, source identification, potential ecological risks and health risk of eight metal elements including Zn, Pb, Ni, Mn, Cu, Cr, Cd and As in the sediments of the XFJR and Heyuan section of the East River (HYER) were investigated.

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Distribution and ecological risks of heavy metals in river sediments and overlying water in typical mining areas of China

Cited by 57 publications

References 16 publications

Chemical Composition and Hazardous Effects of Leachate from the Active Municipal Solid Waste Landfill Surrounded by Farmlands

Chemical Composition and Hazardous Effects of Leachate from the Active Municipal Solid Waste Landfill Surrounded by Farmlands

Characteristics and Assessment of Toxic Metal Contamination in Surface Water and Sediments Near a Uranium Mining Area

Heavy Metals and Arsenic in Sediments of Xinfengjiang Reservoir in South China: Levels, Source Identification and Health Risk Assessment

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