Heavy metal contamination and potential ecological risk for sediments in the Puyang River Basin prior to and post dredging

ZHANG Wei; CHEN Shurong; HOU Ping

doi:10.11833/j.issn.2095-0756.2016.01.005

Volume 33 Issue 1

Jan. 2016

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ZHANG Wei, CHEN Shurong, HOU Ping. Heavy metal contamination and potential ecological risk for sediments in the Puyang River Basin prior to and post dredging[J]. Journal of Zhejiang A&F University, 2016, 33(1): 33-41. doi: 10.11833/j.issn.2095-0756.2016.01.005

Citation:

ZHANG Wei, CHEN Shurong, HOU Ping. Heavy metal contamination and potential ecological risk for sediments in the Puyang River Basin prior to and post dredging[J]. Journal of Zhejiang A&F University, 2016, 33(1): 33-41. doi: 10.11833/j.issn.2095-0756.2016.01.005

Heavy metal contamination and potential ecological risk for sediments in the Puyang River Basin prior to and post dredging

doi: 10.11833/j.issn.2095-0756.2016.01.005

1.
School of Forestry and Biotechnology, Zhejiang A & F University, Lin’an 311300, Zhejiang, China

Received Date: 2015-03-02
Rev Recd Date: 2015-04-24
Publish Date: 2016-02-20

Abstract

Using 25 sediment specimen samples from five tributaries of the Puyang River as well as samples from 64 ecological dredging stations, heavy metal concentrations and their potential ecological risks to the sediments prior to and post dredging were determined. Elements As, Cr, Ni, Cu, Zn, and Pb were analyzed, and then data was plotted based on GIS to compare the pollution levels of different reaches. The index of geo-accumulation and the potential ecological risk index were employed to evaluate the pollution level of heavy metals in the sediments. Results showed that compared to before dredging, after dredging the heavy metal content had decreased one or two times. The potential ecological risk intensity caused by different metals was: As ＞ Pb ＞ Cu ＞ Ni ＞ Cr ＞ Zn. Analysis for degree of comprehensive pollution showed that Xixi River had the most pollution among the tributaries; Puyang River had the lowest pollution and was rated a medium ecological hazard. After dredging, there is still the accumulation of heavy metals, the major pollutants is As. ［Ch, 2 fig. 5 tab. 17 ref.］
- environmental sciences,
- sediment,
- heavy metal contamination,
- Puyang River Basin,
- dredge,
- ecological risk

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通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

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Heavy metal contamination and potential ecological risk for sediments in the Puyang River Basin prior to and post dredging

1. School of Forestry and Biotechnology, Zhejiang A & F University, Lin’an 311300, Zhejiang, China

Received Date: 2015-03-02

Rev Recd Date: 2015-04-24

Publish Date: 2016-02-20

Key words:

Abstract: Using 25 sediment specimen samples from five tributaries of the Puyang River as well as samples from 64 ecological dredging stations, heavy metal concentrations and their potential ecological risks to the sediments prior to and post dredging were determined. Elements As, Cr, Ni, Cu, Zn, and Pb were analyzed, and then data was plotted based on GIS to compare the pollution levels of different reaches. The index of geo-accumulation and the potential ecological risk index were employed to evaluate the pollution level of heavy metals in the sediments. Results showed that compared to before dredging, after dredging the heavy metal content had decreased one or two times. The potential ecological risk intensity caused by different metals was: As ＞ Pb ＞ Cu ＞ Ni ＞ Cr ＞ Zn. Analysis for degree of comprehensive pollution showed that Xixi River had the most pollution among the tributaries; Puyang River had the lowest pollution and was rated a medium ecological hazard. After dredging, there is still the accumulation of heavy metals, the major pollutants is As. ［Ch, 2 fig. 5 tab. 17 ref.］

Heavy metal contamination and potential ecological risk for sediments in the Puyang River Basin prior to and post dredging

doi: 10.11833/j.issn.2095-0756.2016.01.005

Abstract

References

Proportional views

通讯作者: 陈斌, bchen63@163.com

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