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引用本文:范成新,朱育新,吉志军,张路,杨龙元.太湖宜溧河水系沉积物的重金属污染特征.湖泊科学,2002,14(3):235-241. DOI:10.18307/2002.0307
FAN Chengxin,ZHU Yuxin,JI Zhijun,ZHANG Lu,YANG Longyuan.Characteristics of the Pollution of Heavy Metals in the Sediments of Yilihe River, Taihu Basin. J. Lake Sci.2002,14(3):235-241. DOI:10.18307/2002.0307
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太湖宜溧河水系沉积物的重金属污染特征
范成新1, 朱育新1, 吉志军2, 张路1, 杨龙元1
1.中国科学院南京地理与湖泊研究所, 南京210008;2.南京农业大学资源与环境科学学院, 南京210095
摘要:
用ICP方法分析了太湖宜溧河水系沉积物中主要重金属含量,以太湖宜溧河口下层沉积物作背景样品,用均方根法对沉积物中重金属进行了污染综合指数计算,并根据划分的污染等级对宜溧河水系沉积物污染状况进行了分析和评价.结果表明:宜溧河及其入湖口沉积物平均呈轻污染状态,北部支流未受污染,南部支流和太湖沿岸呈轻污染,干流河段污染最为严重,呈偏中度污染水平,在个别测点综合评价已达到重度污染状态.全水系Cu、Zn、Cd和Pb的污染指数略高,其中仅有Cd含量高出我国土壤一级自然背景值,表现为Cd污染型,其原因可能与该地区水泥制造业和有色金属冶炼的污染排放有关.
关键词:  沉积物  重金属评价  镉污染  宜溧河  太湖
DOI:10.18307/2002.0307
分类号:
基金项目:中国科学院知识创新工程项目(KZCX2-31);湖沼特别支持项目;知识创新领域前沿项目(CXNIGLAS-A02-02)共同资助
Characteristics of the Pollution of Heavy Metals in the Sediments of Yilihe River, Taihu Basin
FAN Chengxin1, ZHU Yuxin1, JI Zhijun2, ZHANG Lu1, YANG Longyuan1
1.Nanjing Institute of Geog raphy and Lim nology, Chinese Academy of Sciences, Na njing 210008, P.R.China;2.The Resource and En vironment Department, Nanjing Agr icu ltural Uni versi ty, Nanjing 210095, P.R.Ch ina
Abstract:
The main heavy metals in the sediments of Yilihe River, Yaihu Basin were analy zed with ICP analy tical method.The comprehensive pollution indexes of heavy metals were calculated by root mean square on the backg round of the lower layer sediment sample in the inletof Yilihe River, and the polluted situations were evaluated according to the classified pollution levels.The results showed that the sediments of Yilihe river and its inlet were average in light polluted situation.The north branch streams were not polluted, the south branch streams were in light polluted, and the trunk river, the most polluted, was in average partial middle pollution, but the individual site in the trunk was in heavy polluted situation.Of all the metals Cu, Zn, Cd and Pb were evaluated to be higher pollution indexes, of which only Cd contents exceeded the one-class natural backg round level of China, being Cd-type pollution.The pollution reason was inferred to be relative to the pollutio n discharge of manufacturing industries of cement, nonferrous metal smelt plants.
Key words:  Sediment  heavy metals evaluation  cadmium pollution  Yilihe River  Taihu Basin
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