摘要
根据三峡库区(万州段)消落区沉积物重金属(Zn、Cu、Cd、Cr、Pb、Hg)总量结果,对其进行风险评价,并利用皮尔森相关性分析和主成分分析法对重金属污染进行溯源分析。结果表明:Zn、Cu、Pb、Cd均值高于沉积物重金属背景值;内梅罗综合指数法评价结果显示主要污染因子为Cu(沉积物综合污染指数Pn=3.23);潜在生态风险评价结果显示研究区域均为轻微污染程度,地累积指数法结果表明研究区域Zn、Cu、Pb和Cd为轻微-中等污染;皮尔森相关性分析和主成分分析法结果表明,消落区重金属污染的主要来源是流域内机械制造业的废水、船舶排放的油污废水、大气沉降和农药化肥的施用。
Based on the results of contents of heavy metals （Zn, Cu, Cd, Cr, Pb, Hg） in sediments from water-level fluctuating zone of Three Gorges Reservoir in Wanzhou section, three methods were employed to evaluate the quality status of heavy metals. The person correlation analysis and the principal component analysis （PCA） were applied to estimate the sources of heavy metal. The results showed that the concentrations of Zn, Cu, Pb, Cd were higher than their background value in sediments. The results of nemerow index method showed that the main factors of heavy metal pollution in sediments was Cu （P~ = 3. 23）. Potential risk evaluation results showed that slightly polluting was found in the study area. And index of geoaccumulation implied moderately pollution by Zn, Cu, Pb and Cd. The contamination sources of heavy metals through the Person correlation analysis and the principal component analysis （PCA） revealed that the heavy metals contamination in water- level fluctuating zone were caused by wastewater from mechaical manufacturing and oil-polluted water discharged from ships, atmospheric deposition and pesticides and fertilizers.
作者
蓝巧娟
吴彦
闫彬
张恒畅
陈林
潘杰
付川
LAN Qiao-juan;WU Yan;YAN Bin;ZHANG Heng-chang;CHEN Lin;PAN Jie;FU Chuan(Key Laboratory of Water Environment Evolution and Pollution Control in the Three Gorges Reservoir,Chongqing Three Gorges University,Chongqing 404100,China)
出处
《环境工程》
CAS
CSCD
北大核心
2018年第8期193-197,共5页
Environmental Engineering
基金
国家自然科学基金面上项目(31670467)
三峡库区水环境演变与污染防治重庆高校市级重点实验室开放基金基础理论研究项目(WEPKL2016LL-07)
关键词
消落区沉积物
重金属
地累积指数法
潜在风险评价法
主成分分析法
sediments from water-level fluctuating zone
heavy metals
index of geoaccumulation
potential risk evaluation
principal component analysis
