摘要
在对北京市西城区部分排水管道调研的基础上,对几个典型雨水检查井连接雨水管道沉积物中赋存的主要重金属污染物污染水平及形态分布进行了研究,分析了沉积物粒径及有机质含量对重金属污染物赋存水平的影响.结果表明,排水管道沉积物中:Cr主要以残渣态存在;Cu和Zn以具有活性潜力的铁锰氧化物形态及碳酸盐结合态两种形态为主;Pb的残渣态含量平均值达到了56.4%;Ni的可交换态和碳酸盐结合态含量相对较大;可交换态Cd占其总量的比例最高值达22.4%,而残渣态的Cd含量极小.
Several storm sewers in Xicheng district of Beijing were investigated,and primary heavy metals in the sediments in typical storm sewer were studied.Pollution level and species distribution of heavy metals were analyzed.Such impact factors as sediments grain diameter and its organic matter on heavy metal pollution were discussed.The results reveal that there are significant differences among heavy metals.Cr and Pb exists mainly in residual form;Cu and Zn exist in FeMnOx and carbonates;Ni exists as exchangeable and carbonates forms;the content of exchangeable Cd is up to 22.4%,while its residual form content is much less.
出处
《环境化学》
CAS
CSCD
北大核心
2010年第3期416-420,共5页
Environmental Chemistry
基金
国家自然科学基金项目(No.50808009)
北京市教委科技计划项目(No.KM200810016012)
北京市属市管高等学校人才强教计划资助项目(PHR201008379)
关键词
雨水管道
沉积物
重金属
形态分布
storm sewer
sediments
heavy metal
conformations distribution
