河流三相空间重金属污染综合生态风险评价

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Bibliography:	43-1239/TG Ying ZHANG, Jun ZHOU, Feng-jie GAO, Bao-jie ZHANG, Biao MA, Li-qing LI（ 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） 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. comprehensive ecological risk assessment; priority pollutants selection; heavy metal; Songhua River
ISSN:	1003-6326