昆明市主城区主要入滇河道重金属污染评价  

Evaluation of Heavy Metal Pollution in Main Rivers of Kunming

作　　者：张国涵 苏涛 杨耀雷 夏万永 陈瑞娟 刘云 张俊华 ZHANG Guo-han;SU Tao;YANG Yao-lei;XIA Wan-yong;CHEN Rui-juan;LIU Yun;ZHANG Jun-hua(Kunming Ecological Environment Monitoring Station of Department of Ecology and Environment of Yunnan Province,Kunming Yunnan 650228,China)

机构地区：[1]云南省生态环境厅驻昆明市生态环境监测站,云南昆明650228

出　　处：《环境科学导刊》2022年第3期74-79,共6页Environmental Science Survey

摘　　要：采用污染负荷指数法、地累积指数法和潜在生态风险指数法,对2014—2019年昆明市主城区5条主要河道底泥中As、Pb、Cd、Cr、Cu、Zn等7种重金属的含量进行了分析和评价。污染负荷指数法分析结果表明:5条河道底泥重金属的CF_(i)平均值范围为1.68~52.36,7项指标对污染的贡献程度大小为:Cd>Hg>Zn>Cu>Pb>As>Cr;5条河道的PLI值范围为3.02~18.88,污染等级均为“极强污染”,污染负荷大小顺序为:运粮河>船房河>新河>大清河>盘龙江。地质累积指数分析结果表明:5条河道中运粮河和船房河重金属累积程度远高于其它3条河道,各指标总体污染顺序为:Hg>Cd>Zn>Cu>Pb>Cr>As。潜在生态风险指数法分析结果表明:5条河道底泥重金属的平均值范围为3.36~1570.64,重金属危害程度顺序为:Cd>Hg>Cu>Pb>As>Zn>C_(r)^(i)RI值范围为1074.61~9157.91,5条河道的潜在生态危害程度均为“很强”;按照风险程度排列为:运粮河>船房河>大清河>新河>盘龙江。The contents of As,Pb,Cd,Cr,Cu and Zn in the sediments of five main rivers in the main urban area of Kunming from 2014 to 2019 were analyzed and evaluated by Pollution Load Index method,Index of geo-accumulation method and Potential ecological risk method.The results of Pollution Load Index analysis showed that the average CF_(i) of heavy metals ranged from 1.68 to 52.36,and the contribution of seven indexes to pollution was as follows;Cd﹥Hg﹥Zn﹥Cu﹥Pb﹥As﹥Cr;The PLI values of the five rivers ranged from 3.02 to 18.88,and the pollution levels were extremely strong.The order of pollution load was:Yunliang River>Chuanfang River>Xin River>Daqing River>Panlong River.The analysis results of Index of geo-accumulation showed that the accumulation of heavy metals in the Yunliang River and Chuanfang River in the five rivers was much higher than that in the other three rivers,and the overall pollution order of each index was:Hg﹥Cd﹥Zn﹥Cu﹥Pb﹥Cr﹥As.The results of Potential ecological risk analysis showed that the average value of heavy metals in sediments of five rivers ranged from 3.36 to 1570.64,and the order of heavy metal hazards was:Cd﹥Hg﹥Cu﹥Pb﹥As﹥Zn﹥Cr;RI values ranged from 1074.61 to 9157.91,and the potential ecological hazards of the five rivers were very strong.The order of the degree of risk was Yunliang River>Chuanfang River>Daqing River>Xin River>Panlong River.

关 键 词：重金属 底泥污染评价 污染负荷指数 地质累积指数 潜在生态风险 昆明 

分 类 号：X824[环境科学与工程—环境工程]