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引用本文:程南宁,李巍,冉光兴,杜心慧,曹卉.浙江东钱湖底泥污染物分布特征与评价.湖泊科学,2007,19(1):58-62. DOI:10.18307/2007.0109
CHENG Nanning,LI Wei,RAN Guangxing,DU Xinghui,CAO Hui.Characteristics and risk evaluation of pollutants in sediments of Lake Dongqian, Zhejiang Province. J. Lake Sci.2007,19(1):58-62. DOI:10.18307/2007.0109
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浙江东钱湖底泥污染物分布特征与评价
程南宁, 李巍, 冉光兴, 杜心慧, 曹卉
上海勘测设计研究院, 上海200434
摘要:
对东钱湖底泥做了全面调查, 测定了底泥粒度组成、有机质、TN、TP及重金属含量, 分析了底泥沉积特性及污染物分布特征, 分别采用潜在生态危害指数(RI)法和相对背景值法对重金属污染风险和有机污染及营养盐污染进行了评价.研究结果表明:东钱湖底泥组成以细颗粒为主, 重金属含量除镉污染达到中等生态危害程度外, 其余均处于较低水平, 湖区底泥中有机污染和氮污染问题非常突出.为有效治理东钱湖内源污染, 有必要开展包括生态疏浚在内的内源污染治理措施.研究为进一步开展东钱湖水环境治理提供了理论依据.
关键词:  东钱湖  底泥  分布特征  潜在生态危害指数(RI)  相对背景值  评价
DOI:10.18307/2007.0109
分类号:
基金项目:建设部科技攻关项目(03-2-069)资助.
Characteristics and risk evaluation of pollutants in sediments of Lake Dongqian, Zhejiang Province
CHENG Nanning, LI Wei, RAN Guangxing, DU Xinghui, CAO Hui
Shanghai Investigation, Design & Research Institute, Shanghai 200434, P.R.China
Abstract:
Investigations were carried out in order to obtain sizes grades and the content of organic, total nitrogen, total phosphorus and heavy metals in sediments of Lake Dongqian ( a lake in Ningbo city).Sedimentation character and pollutant distribution characteristics were analyzed in the article.The results indicated that the chief component of sediments was fine particle.The concentrations of most heavy metals were low except for Cd, which showed medium ecological risk.Heavy metals pollution level was slight as evaluated by Hakanson potential ecological risk index method, whereas organic and nitrogen pollution was severe compared with relative environment baseline such as in bottom layer sedimentary and Taihu Lake sediment.Heavy pollution sediments in upper layer were also noted.In order to efficiently control the internal source pollution, it is necessary to employ internal source pollution control measures such as ecological dredging.The research provides theoretical support for Lake Dongqian water environment treatment.
Key words:  Lake Dongqian  sediment  pollution characteristics  potential ecological risk index  relative baseline  evaluation
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