森林工程2017，Vol.33Issue(1)：28-32,65,6.
南京市梅雨期雨洪沉积物重金属污染评价
Pollution Evaluation of Heavy Metal in StormwaterSediment in Nanjing in Rainy Season
摘要
Abstract
In order to know the risk of heavy metal element content in sediment of stormwater and the degree of pollution hazard in Nanjing in rainy season,24 samples were obtained and the metal elements of Zn,Pb,Cr,Ni and Cd were measured.Pearson correlation coefficient and combination of factor analysis were used to examine the relationship between various heavy metals in sediments.Methods of cumulative index and potential ecological risk index were used to evaluate the degree of pollution and ecological risk of heavy metals.The results indicated that the mean concentrations of Zn,Pb,Cr,Ni and Cd in sediment of stormwater were 116.64,43.56,86.32,41.13 and 0.32mg/kg,respectively,which were 1.8,1.98,1.14,1.29 and 4.00 times of the Jiangsu soil background values.The index of geoaccumulation analysis results showed that the pollution degree of 5 kinds of heavy metals followed respectively:Cd＞Zn＞Pb＞Ni＞Cr and the Cd、Pb were non-to moderate-pollution and the Cr was of non-pollution.The results of potential ecological risk index analysis showed that single potential ecological risk coefficient Eir of 5 kinds of heavy metals was described in following order:Cd＞Pb＞Ni＞Cr＞Zn.Single potential ecological risk coefficient Eir was less than 40 and potential ecological risk index RI was less than 150.Five kinds of heavy metal in sediment of stormwater all belonged to a light potential ecological risk.The Zn,Pb and Ni mainly came from transportation and people stream.The Cr mainly came from weathering soil and architecture source.The results of this study had important realistic meaning for heavy metal pollution control,environmental quality assessment and the city layout program.关键词
雨洪沉积物/重金属/地累积指数/潜在生态危险指数/污染评价Key words
Sediment of stormwater/heavy metal element/index of geoaccumulation/potential ecological risk coefficient/pollution evaluation分类
资源环境引用本文复制引用
骆辉,周舒宇,黄新,佟蕾..南京市梅雨期雨洪沉积物重金属污染评价[J].森林工程,2017,33(1):28-32,65,6.基金项目
江苏高校优势学科建设工程资助项目(PAPD) （PAPD）
