长江口水体中重金属形态交换过程的研究

研究了重金属在水体中溶解态和颗粒态的含量分布，并以一个代表性水平剖面和垂直剖面分析了金属形态交换过程。其动态交换是，重金属由颗粒态沿水平方向交换时向溶解态转化，形态转化强度为Ｎｉ〉Ｆｅ〉Ｃｏ〉Ｃｕ〉Ｍｎ〉Ｐｂ；重金属的垂向交换过程，都是被铁锰（水合）氧化物及有机质吸附，向金属铁锰氧化物态转化，形态转化强度为Ｐｂ〉Ｃｕ〉Ｍｎ〉Ｆｅ〉Ｎｉ〉Ｃｏ，最后得出长江口海域金属污染程度及环境现状。

A Study on the Exchange Process of Heavy Metals Species in the Changjiang River Estuary

The present paper deats with the exchange process and distribution of particulate species, solublespecies, and various other species of suspended. particles trace metals from waterbody across themain axis of the Changjiang river diluted waler inflood season. The variation trend of its stateshows that trace metals along horizontal profiletended to tranfer from particulate forms into soluble form, and the translation priorly of metalsforms was Ni>Fe Co>Cu>Mn>Pb. The vertical changes of their chemical forms in aqueous environment was adsorbed by Fe--Mn oxides and organic detritus; the metals bound Fe--Mn oxidescombined species WPs the most important speciation j and the tranferable forder of metals forms isph>Cu> Mn>Fe>Ni>Co. Finally, the environmental status and pollution level in the watercolumn of Changjiang estuary was discussed'