摘要
采用地积累指数法和潜在生态危害指数法从不同角度对湘江长株潭段底泥中的重金属污染进行分析评价。研究结果表明:对照全国土壤环境Ⅲ级质量标准和长株潭地区土壤背景值,重金属超标情况类似,Cd,As,Zn,Pb和Cu的含量峰值均在霞湾江段;各种重金属的污染程度从大到小的排序为:Cd,Zn,As,Pb,Ni,Cu和Cr;重金属的潜在生态危害系数从大到小的顺序为:Cd,As,Pb,Zn,Cu和Cr(Pb与Zn的相当),其中,Cd的影响起决定作用。
The evaluation of heavy metal pollution degree in the sediments Chang—Zhu—Tan section of the Xiangjiang River was carried out by the index of geoaccumulation（Igeo） and the potential ecological risk index（RI） from different perspectives.The results indicate that according to the national soil environmental quality Ⅲ class standard and the soil background values of Chang—Zhu—Tan area,heavy metal contamination is the situation in similar to exceeding the standard level.The peak contents of Cd,As,Zn,Pb and Cu are all in Xiawan section of the Xiangjiang River.The descending order of pollution degree of various metals is（from large to small） Cd,Zn,As,Pb,Ni,Cu and Cr;and the potential ecological risk intensity caused by different metals is（from large to small） Cd,As,Pb,Zn,Cu and Cr（the risk intensity of Pb and Zn is similar）,and Cd is the predominant element among them.
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2012年第9期3710-3717,共8页
Journal of Central South University:Science and Technology
基金
中国区调局项目(1212010310304)
关键词
底泥
重金属污染
地积累指数
潜在生态风险
湘江长株潭段
sediments
heavy metals contamination
index of geoaccumulation
potential ecological risk
Chang—Zhu— Tan section of the Xiangjiang River
