ISSN: 1003-6326
CN: 43-1239/TG
CODEN: TNMCEW

Vol. 25    No. 10    October 2015

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Comprehensive ecological risk assessment forheavy metal pollutions in three phases in rivers
Ying ZHANG1,Jun ZHOU1,2, Feng-jie GAO1, Bao-jie ZHANG2,Biao MA2, Li-qing LI3
(1. College of Resources and Environment, Northeast Agricultural University, Harbin 150030, China;
2. Heilongjiang Research Academy of Environmental Science, Harbin 150056, China;
3. School of Energy Science and Engineering, Central South University, Changsha 410083, China
)
Abstract: Literature lacked in providing a comprehensive research on heavy metal detection in aquatic, biological and sedimentary states of rivers. The present study was imparted with all these three components of the river. Heavy metal toxicity or pollution index was used as a tool for ecological risk assessment by considering the single state studies conducted by many researchers. An intensive ecological risk assessment model was constructed and heavy metals were indicated as a serious threat to the environment. The model was applied to determining five toxic heavy metals in three states of the Songhua River. According to the ecological risk index, heavy metal pollution in three phases was categorized as aquatic>biological>sedimentary, while the overall descending order of heavy metal ecological risk index was as Cd>Hg>As>Pb>Cr. Cd and Hg were selected as the priority pollutants of Songhua River.
Key words: comprehensive ecological risk assessment; priority pollutants selection; heavy metal; Songhua River
Superintended by The China Association for Science and Technology (CAST)
Sponsored by The Nonferrous Metals Society of China (NFSOC)
Managed by Central South University (CSU) 湘ICP备09001153号-9