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Vertical Distribution of Heavy Metals in Sediments of Qinhe River and Its Risk Assessment(PDF)

Chinese Journal of Applied & Environmental Biology[ISSN:1006-687X/CN:51-1482/Q]

Issue:
2013 02
Page:
305-312
Research Field:
Articles
Publishing date:

Info

Title:
Vertical Distribution of Heavy Metals in Sediments of Qinhe River and Its Risk Assessment
Author(s):
FU Peng WANG Fei MA Xiuping WANG Lan
(School of Life Sciences, Shanxi University, Taiyuan 030006, China)
Keywords:
Qinhe River sediment heavy metal vertical distribution risk assessment
CLC:
X522 + X820.4
PACS:
DOI:
10.3724/SP.J.1145.2013.00305
DocumentCode:

Abstract:
In order to investigate the heavy metal sediments of Qinhe River, we analyzed the vertical distribution pattern of 22 sampling points in 5 counties combined with the actual environment factors of Qinhe River. The environmental risk assessment was conducted by using sediment quality guidelines and potential ecological risk index. The underlying sources of heavy metals were analyzed by sediment enrichment factor. The results showed that the Pb and Cu pollution might have occurred in the middle and lower Qinhe River, and then gradually eased. In addition, continuous Cr and Cd pollution sources probably existed in Qinshui County. The SQG analysis indicated that Cu, Zn and Cr in Qinhe River were of moderate ecological toxicity, which might result in negative effects on biota of the watersheds. Moreover, high Cd content in Qinshui County had huge toxic threats to aquatic organisms. Compared with the soil background values of Shanxi, the potential ecological risk of heavy metals was as Cd>Pb>Cu>Zn>Cr>Mn, with the Qinshui County the most seriously polluted. The results were similar with that of SQG. According to the sediment enrichment factor, heavy metal enrichment was observed for more than 60% of sampling points. As the point source pollutants of S11 and S13, Cd might be mainly from the constant drain outlets. Fig 3, Tab 8, Ref 33

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Last Update: 2013-05-03