饶河入鄱阳湖口处沉积物中重金属分布特征及形态研究  

Distribution and Fractions of Heavy Metals in Poyang Lake at Inlet of Raohe River

作　　者：曾凡萍[1,2] 辛朝 肖化云[2,3] 周文斌[2] 

机构地区：[1]萍乡市环境监测站,江西萍乡337000 [2]南昌大学环境科学与工程学院教育部鄱阳湖湖泊生态与生物资源利用实验室,江西南昌330047 [3]中国科学院地球化学研究所环境地球化学国家重点实验室,贵州贵阳550002

出　　处：《环境监测管理与技术》2011年第2期19-22,共4页The Administration and Technique of Environmental Monitoring

基　　金：国家自然科学基金资助项目(40672159)

摘　　要：为了解饶河入鄱阳湖湖口重金属污染状况,在鄱阳湖饶河入湖段设置了3个采样点,用原子吸收分光光度计对沉积物进行了重金属Cu、Pb、Zn的测定,分析了这3种元素在各采样点的形态分布特征。结果表明:饶河入鄱阳湖口处沉积物中Cu、Pb、Zn的污染较为严重,呈现出复合污染的趋势。该区域沉积物中3种元素的分布受水流的影响较大,其形态主要以有机态与残渣态为主,可交换态和碳酸盐结合态等生物有效态相对较少。其中Pb的可交换态、碳酸盐结合态和铁锰氧化物结合态较Cu和Zn的这些形态高,生物危害性较大,为污染治理的主要对象。In order to know heavy metal pollution situation of Raohe river into Poyang Lake,concentrations of Cu,Pb and Zn were determined by atomic absorption spectrometer in sediment samples which collected in 3 sampling sites.Fractions of the 3 elements were analyzed.The results showed that sediment pollution of Cu,Pb and Zn at Raohe estuary were relatively serious.Geochemical distribution of the 3 elements was largely influenced by water flow.Chemical speciation of the 3 elements mostly consisted of organic matter and residual bound fraction and bioavailability speciation poorly contained such as exchangeable fraction and acid extractable fraction.Ratios of exchangeable fraction,acid extractable fraction and iron-manganese oxide bound fraction of Pb were higher than that of Cu and Zn.Pollution control was armed at Pb because the element had a great danger to organism.

关 键 词：沉积物 重金属分布 重金属形态 鄱阳湖 饶河 

分 类 号：X825[环境科学与工程—环境工程]