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引用本文:田海涛,张振克,丁海燕,李彦明,孟红明.40年来江苏石梁河水库重金属污染的沉积记录.湖泊科学,2008,20(5):600-604. DOI:10.18307/2008.0508
TIAN Hai-tao,ZHANG Zhen-ke,DING Hai-yan,LI Yan-ming,MENG Hong-ming.Recent 40-year sedimentary record of heavy metal pollution in the Shilianghe Reservoir, Jiangsu Province. J. Lake Sci.2008,20(5):600-604. DOI:10.18307/2008.0508
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40年来江苏石梁河水库重金属污染的沉积记录
田海涛1,2, 张振克1, 丁海燕1,3, 李彦明1, 孟红明1
1.南京大学地理与海洋科学学院海岸与海岛开发教育部重点实验室, 南京 210093;2.国家海洋局南海海洋工程勘察与环境研究院, 广州 510300;3.盐城师范学院地理系, 盐城 224002
摘要:
根据石梁河水库沉积物粒度和重金属元素(Cu,Cr,Zn,AS和Pb)含量的分析,结合137Cs放射性比活度精确定年,研究了石梁河水库沉积速率和重金属的污染变化特征,并利用地累积指数法评价了重金属的污染程度.结果表明:石梁河水库40年来平均淤积速率为3.85cm/a,Cu,Cr和Zn地累积指数一直小于1,处于轻微污染;As污染水平变化较大,现处于低水平的轻度污染;Pb污染水平自柱底始持续恶化,目前地累积指数大于1,且有污染加剧趋势.
关键词:  石梁河水库  137Cs定年  重金属  地累积指数
DOI:10.18307/2008.0508
分类号:
基金项目:国家自然科学基金项目(40471128)资助
Recent 40-year sedimentary record of heavy metal pollution in the Shilianghe Reservoir, Jiangsu Province
TIAN Hai-tao1,2, ZHANG Zhen-ke1, DING Hai-yan1,3, LI Yan-ming1, MENG Hong-ming1
1.Key Laboratory of Coast and Island Development of the MOE, School of Geographic and Oceanographic Sciences, Nanjing University, Nanjing 210093, P.R.China;2.South China Sea Marine Engineering and Environment Institute, SOA, Guangzhou 510300, P.R.China;3.Geographical Department of Yancheng Normal University, Yancheng 224002, P.R.China
Abstract:
According to the analysis of the grain size, content of heavy metals (Cu, Cr, Zn, As and Pb) and 137Cs dating in Shilianghe Reservoir, the sedimentary rate and pollution characteristic of heavy metals were investigated. The geo-accumulation index was used to assess the pollution degree of heavy metals. It showed that the averaged sedimentary rate was 3.85cm/a, and Cu, Cr and Zn were in the light polluted level with the geo-accumulation index less than 1 during the past 40 years. The geo-accumulation index of As fluctuated strongly, but now it was in the light polluted level. The geo-accumulation index of Pb was more than 1, and the pollution level increased gradually from the bottom of the core and trends to aggravate.
Key words:  Shilianghe Reservoir  137Cs dating  heavy metal  geo-accumulation index
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