摘要
对太湖竺山湾湖泊中重(类)金属、磷、硫元素、有机有毒物质的含量及放射性元素的放射强度进行了检测,通过对比雪堰段与周铁段的相关物质含量,分析了有害物质含量差异的原因,并对其环境污染进行了评价.结果表明:太湖竺山湾底泥中重(类)金属含量总体较低,其中雪堰段比周铁段含量高;有机毒物HCHs、DDTs、PCBs、PAHs由于来源不同,两地相关物质含量不同,但总体上含量较低;湖泊底泥中放射性元素铅、铯的放射性强度低,符合我国开放场址土壤中剩余放射性可接受水平的规定.湖泊底泥中含有较高的磷元素,清淤过程应减轻底泥中磷的释放对水体造成的污染.本结果对太湖底泥沉积物的测量,特别是对放射性元素放射强度的检测,有利于全面了解该湖泊沉积的环境污染现状;评价其污染程度,并为太湖污染治理、清淤底泥的后续利用、风险管理提供科学数据和决策支持.
Aseries of tests about the content of heavy metal element,phosphorus,sulfur,organic toxic substance and intensity of radioactivity of radio elements of sediments in Zhushan Bay,Taihu Lake was studied.Though compared those substances contents in Xueyan Area with those in Zhoutie Area,reasons concerning on difference of content and evaluated environmental pollution state was analyzed.The content of heavy metal was generally low,though it＇s large in Xuanyan Area;overall,the content of organic toxic substance（HCHs、DDTs、PCBs、PAHs） was low in spite of different origins and contents;intensity of radioactivity of 137Cs and 210Pb were small,corresponded with the regulation for acceptable level of residual radionuclide in soil of site considered for release regulated by our country in opening site;sediment contains high phosphorus elements so that secondary pollution should be avoided in cleaning process to reduce water pollution which caused by phosphorus release.Testing of sediment elements,especially the intensity of radioactivity of radioelements was beneficial to fully understanding the actuality of environmental pollution state of the lake and evaluating pollution level,which also provided scientific date and decision support for pollution abatement,follow-up utilization of cleaned mud and risk management.
出处
《中国环境科学》
EI
CAS
CSCD
北大核心
2011年第5期852-857,共6页
China Environmental Science
基金
国家自然科学基金资助项目(41030751
40873071)
江苏省教育厅重大项目(09KJA170002)
江苏高校优势学科建设工程资助项目
关键词
太湖竺山湾
湖泊底泥
重金属
有机有毒物质
放射性强度
Zhushan Bay
Taihu Lake
sediment of lake
heavy metal
toxicant
radioactivity intensity
作者简介
张明礼（1976-），男，山东沂水人，讲师，博士，主要研究方向土壤侵蚀与环境效应．发表论文10余篇．
责任作者，yanghao@njnu．edu．cn
