Pollution characteristics and ecological risk assessment of heavy metals in the surface sediments from a source water reservoir
Surface sediment samples were collected from a source water reservoir in Zhejiang Province, East of China to investigate pollution characteristics and potential ecological risk of heavy metals. The BCR sequential extraction method was used to determine the four chemical fractions of heavy metals suc...
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Online Access: | http://dx.doi.org/10.1080/09542299.2016.1206838 |
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doaj-0e66505aed8845d6919cd6c35b0985042020-11-24T21:53:22ZengTaylor & Francis GroupChemical Speciation & Bioavailability0954-22992047-65232016-10-01281-413314110.1080/09542299.2016.12068381206838Pollution characteristics and ecological risk assessment of heavy metals in the surface sediments from a source water reservoirChangming Yang0Yaqiong Wu1Fen Zhang2Lin Liu3Ruijie Pan4Tongji UniversityTongji UniversityTongji UniversityTongji UniversityTongji UniversitySurface sediment samples were collected from a source water reservoir in Zhejiang Province, East of China to investigate pollution characteristics and potential ecological risk of heavy metals. The BCR sequential extraction method was used to determine the four chemical fractions of heavy metals such as acid soluble, easily reducible, easily oxidizable and residual fractions. The heavy metals pollution and potential ecological risk were evaluated systematically using geoaccumulation index (Igeo) and Hakanson potential ecological risk index (H′). The results showed that the sampling sites from the estuaries of tributary flowing through downtowns and heavy industrial parks showed significantly (p < 0.05) higher average concentrations of heavy metals in the surface sediments, as compared to the other sampling sites. Chemical fractionation showed that Mn existed mainly in acid extractable fraction, Cu and Pb were mainly in reducible fraction, and As existed mainly in residual fraction in the surface sediments despite sampling sites. The sampling sites from the estuary of tributary flowing through downtown showed significantly (p < 0.05) higher proportions of acid extractable and reducible fractions than the other sampling sites, which would pose a potential toxic risk to aquatic organisms as well as a potential threat to drinking water safety. As, Pb, Ni and Cu were at relatively high potential ecological risk with high Igeo values for some sampling locations. Hakanson potential ecological risk index (H′) showed the surface sediments from the tributary estuaries with high population density and rapid industrial development showed significantly (p < 0.05) higher heavy metal pollution levels and potential ecological risk in the surface sediments, as compared to the other sampling sites.http://dx.doi.org/10.1080/09542299.2016.1206838Qingshan Reservoirsurface sedimentheavy metalschemical fractionationpotential ecological risk |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Changming Yang Yaqiong Wu Fen Zhang Lin Liu Ruijie Pan |
spellingShingle |
Changming Yang Yaqiong Wu Fen Zhang Lin Liu Ruijie Pan Pollution characteristics and ecological risk assessment of heavy metals in the surface sediments from a source water reservoir Chemical Speciation & Bioavailability Qingshan Reservoir surface sediment heavy metals chemical fractionation potential ecological risk |
author_facet |
Changming Yang Yaqiong Wu Fen Zhang Lin Liu Ruijie Pan |
author_sort |
Changming Yang |
title |
Pollution characteristics and ecological risk assessment of heavy metals in the surface sediments from a source water reservoir |
title_short |
Pollution characteristics and ecological risk assessment of heavy metals in the surface sediments from a source water reservoir |
title_full |
Pollution characteristics and ecological risk assessment of heavy metals in the surface sediments from a source water reservoir |
title_fullStr |
Pollution characteristics and ecological risk assessment of heavy metals in the surface sediments from a source water reservoir |
title_full_unstemmed |
Pollution characteristics and ecological risk assessment of heavy metals in the surface sediments from a source water reservoir |
title_sort |
pollution characteristics and ecological risk assessment of heavy metals in the surface sediments from a source water reservoir |
publisher |
Taylor & Francis Group |
series |
Chemical Speciation & Bioavailability |
issn |
0954-2299 2047-6523 |
publishDate |
2016-10-01 |
description |
Surface sediment samples were collected from a source water reservoir in Zhejiang Province, East of China to investigate pollution characteristics and potential ecological risk of heavy metals. The BCR sequential extraction method was used to determine the four chemical fractions of heavy metals such as acid soluble, easily reducible, easily oxidizable and residual fractions. The heavy metals pollution and potential ecological risk were evaluated systematically using geoaccumulation index (Igeo) and Hakanson potential ecological risk index (H′). The results showed that the sampling sites from the estuaries of tributary flowing through downtowns and heavy industrial parks showed significantly (p < 0.05) higher average concentrations of heavy metals in the surface sediments, as compared to the other sampling sites. Chemical fractionation showed that Mn existed mainly in acid extractable fraction, Cu and Pb were mainly in reducible fraction, and As existed mainly in residual fraction in the surface sediments despite sampling sites. The sampling sites from the estuary of tributary flowing through downtown showed significantly (p < 0.05) higher proportions of acid extractable and reducible fractions than the other sampling sites, which would pose a potential toxic risk to aquatic organisms as well as a potential threat to drinking water safety. As, Pb, Ni and Cu were at relatively high potential ecological risk with high Igeo values for some sampling locations. Hakanson potential ecological risk index (H′) showed the surface sediments from the tributary estuaries with high population density and rapid industrial development showed significantly (p < 0.05) higher heavy metal pollution levels and potential ecological risk in the surface sediments, as compared to the other sampling sites. |
topic |
Qingshan Reservoir surface sediment heavy metals chemical fractionation potential ecological risk |
url |
http://dx.doi.org/10.1080/09542299.2016.1206838 |
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