Studies on distribution and fractionation of heavy metals in Gomti river sediments—a tributary of the Ganges, India

Singh, Kunwar P.; Mohan, Dinesh; Singh, Vinod Kumar; Malik, Amrita

doi:10.1016/j.jhydrol.2005.01.021

Cited by 619 publications

(324 citation statements)

References 41 publications

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“…These have special affinity for carbonate and may co-precipitate with carbonate minerals (Forstner and Wittmann, 1991). Similar results were found in a previous study (Singh, et al, 2005). Lead was dominant in F3 and which has proved to be sensitive to anthropogenic inputs (Modak, et al, 1992).…”

Section: Discussionsupporting

confidence: 91%

Occurrence of tributyltin compounds and characteristics of heavy metals

Sheikh

Noah

Tsuha

et al. 2007

Int. J. Environ. Sci. Technol.

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Section: Discussionsupporting

confidence: 91%

Occurrence of tributyltin compounds and characteristics of heavy metals

Sheikh

Noah

Tsuha

et al. 2007

Int. J. Environ. Sci. Technol.

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“…The second method was the Risk Assessment Code (RAC) classification based on the percentage of metals in the carbonate and exchangeable fractions (Singh et al 2005). The classification is based on the strength of the bond between metals and the different geochemical fractions in sediments and the ability of metals to be released (Cai et al 2011) and enter into the food chain.…”

Section: Ecological Risk Assessmentmentioning

confidence: 99%

Speciation and ecological risk of heavy metals and metalloid in the sediments of Zhalong Wetland in China

Zang

Xiao

et al. 2013

Int. J. Environ. Sci. Technol.

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A total of 271 sediments samples from the Zhalong Wetland were analyzed for concentration and distribution of Hg, Cd, As, Cu, Pb, Zn, Cr, and Zn; their speciation according to the modified European Community Bureau of Reference sequential extraction procedures and their ecological risk based on Lars Hakanson's potential ecological risk assessment and risk assessment code were made. The results can be summarized as the followings: (1) Concentrations of all metals measured were above soil background values of Songnen Plain, and their spatial distributions were distinctly different. The concentrations of metals (except Pb) were high in the east, followed by the north, and were relatively low in the core zone and south. The concentration of Pb was high in the north, south, and west, compared with low concentration in the core zone and east. (2) The dominant proportion of Pb, Zn, and Cr was in the residual fraction, suggesting that they were environmental stable. The concentrations of Cu and As in the reducible fraction, the concentration of Cd in the acidsoluble fraction, and the concentration of Hg in the oxidizable fraction were relatively high, indicating they had greater environmental effects. (3) The evaluation of the ecological risk showed that Cd, Hg, and As had relatively high ecological risk index, especially the ecological risk of Cd should be paid attention to. In general, the ecological risk of the heavy metals and metalloid by zone was experimental zone [ buffering zone [ ecological tourism zone [ core zone.

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“…The RAC assesses the potential release of metals in solution based on the percentage of exchangeable and carbonate fractions in sediments. The classification is as follows [35]: metals in exchangeable and carbonate-bound fractions <1%, no risk; 1-10%, low risk; 11-30%, medium risk; 31-50%, high risk; ≥75%, very high risk.…”

Section: Risk Assessmentmentioning

confidence: 99%

Heavy metal sources and associated risk in response to agricultural intensification in the estuarine sediments of Chaohu Lake Valley, East China

Tang

Shan

Zhang

et al. 2010

Journal of Hazardous Materials

205

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a b s t r a c tIn this study, the source and risk associated with heavy metals in the estuarine sediments of Chaohu Lake Valley in East China were studied. The results demonstrated that most metal contents (Cd, Pb and Zn) increased continuously from 0.21, 8.05 and 73.76 mg/kg in the substrate to 0.33, 17.20 and 100.22 mg/kg in the surface sediments on average, respectively, in all ten estuaries evaluated. In addition, the high proportion of chemically reactive forms of Cd (18.10-33.60%) implied a moderately high risk, while the risk associated with Pb and Zn was moderate in most estuaries. Enrichment factor (EF) and cluster analysis (CA) were conducted to assess the metal sources. The EF values of Cd, Pb and Zn (4.96, 3.68 and 2.25, respectively) indicated that they had accumulated in the estuarine sediments. Additionally, CA suggested that their primary sources were anthropogenic, namely the extensive use of fertilizers. Therefore, heavy metal pollution due to agricultural intensification in Chaohu Lake Valley should be taken into account during the formation of valley management strategies for the water environment.

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Studies on distribution and fractionation of heavy metals in Gomti river sediments—a tributary of the Ganges, India

Cited by 619 publications

References 41 publications

Occurrence of tributyltin compounds and characteristics of heavy metals

Occurrence of tributyltin compounds and characteristics of heavy metals

Speciation and ecological risk of heavy metals and metalloid in the sediments of Zhalong Wetland in China

Heavy metal sources and associated risk in response to agricultural intensification in the estuarine sediments of Chaohu Lake Valley, East China

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