吉首大学学报（自然科学版）2016，Vol.37Issue(4)：35-39,77,6.DOI:10.3969/j.cnki.jdxb.2016.04.008
茅洲河流域表层沉积物重金属生态风险评价
Ecological Risk Assessment of Heavy Metals in the Surface Sediments of Maozhou River
摘要
Abstract
In order to understand the pollution characteristics of heavy metals in the surface sediments of mainstream and its tributaries of the Maozhou river in Shenzhen ,the concentrations of 7 metals including Pb ,Cr ,Cd ,Cu ,Zn ,Ni and As in 34 sediment samples were analyzed .Index of geo‐accumulation ,pollution load index and potential ecological risk index were utilized to access the pollution level and potential eco‐logical risk of heavy metals .The results showed that the sediments of Maozhou river were characterized by elevated levels of Pb ,Cd ,Cr ,Cu ,Zn and Ni ,w hich exceeded the average content of heavy metal in the sediments of lakes in China .According to the national Marine sediments standard ,most of Cr ,Cu ,Zn and Ni were higher than the threshold values of class Ⅲ .In addition ,index of geo‐accumulation followed the order of Cu>Ni~Zn~Cd~Cr>Pb>As ,pollution load index was Cu>Ni~Zn>Cd~Cr> Pb> As and the order of potential ecological risk index was Cd ~Cu>Ni>Cr~Zn>As~Pb ,which indicated that the sediment was polluted by Cu ,Zn ,Ni ,Cd and Cr .关键词
茅洲河/沉积物/重金属/生态风险Key words
Maozhou River/sediment/heavy metal/risk assessment分类
资源环境引用本文复制引用
龚亚龙,黄聪,黄雷,李红艳,林晓燕,许闯,谭璐明,赵亮..茅洲河流域表层沉积物重金属生态风险评价[J].吉首大学学报（自然科学版）,2016,37(4):35-39,77,6.基金项目
深圳市科技研发资金技术开发项目（CXZZ20140418105252027）；广东省省级科技计划资助项目 （）
