Heavy metals' process in water and pollution risk assessment in surface sediments of the Zhujiang River Estuary

ZHANG Yanan; HE Qing; CHEN Jinmin; LIN Cai; JI Weidong

doi:10.3969/j.issn.0253 4193.2013.02.019

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ZHANG Yanan, HE Qing, CHEN Jinmin, LIN Cai, JI Weidong. Heavy metals' process in water and pollution risk assessment in surface sediments of the Zhujiang River Estuary[J]. Haiyang Xuebao, 2013, 35(2): 178-186. doi: 10.3969/j.issn.0253 4193.2013.02.019

Citation:

ZHANG Yanan, HE Qing, CHEN Jinmin, LIN Cai, JI Weidong. Heavy metals' process in water and pollution risk assessment in surface sediments of the Zhujiang River Estuary[J]. Haiyang Xuebao, 2013, 35(2): 178-186. doi: 10.3969/j.issn.0253 4193.2013.02.019

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Heavy metals' process in water and pollution risk assessment in surface sediments of the Zhujiang River Estuary

doi: 10.3969/j.issn.0253 4193.2013.02.019

Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005, China

Received Date: 2012-05-22
Rev Recd Date: 2012-09-26

Abstract

Abstract

On the basis of the data of four seasons of seawater and sediments from the 908 survey in the Pearl River Estuary, the concentration distribution characteristics of the heavy metals in seawater and sediments were made; results show that the mean content of seven heavy metals (Cu,Pb,Zn,Cd,Cr,Hg,As) in Pearl River Estuary and surrounding seas all belonged to the Ⅰ-level seawater quality standard, and the correlation between the heavy metals and environmental factors is obtained through mathematic statistic method. The result indicates that in the estuarine the heavy metals' main process is diluting and mixing,the heavy metals in SPM mainly desorb under acidification effect, and oxidation-reduction has little influence.There was a statistically significant correlation between the element Cu-Zn,Pb-Zn,Cu-Cd,Pb-Cd,Zn-Cd,Pb-Cr,Zn-Cr,and Cd-Cr in sediments,which indicates that they have similar geochemical properties and sources. The method of potential ecological risk index presented by Lars Hakanson was used to assess the heavy metals' ecological risk.The main source of the potential ecological risk of the sediment are Cd,Hg, which is worth the key attention that the pollution levels and the potential ecological risks of Cd local surged in sediments.
- Zhujiang River Estuary,
- heavy metals,
- environmental factors,
- pollution risk assessment

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References(13)

References

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