长江下游重金属在水相-悬浮物中的分布与输移

以长江下游的水体和悬浮物为研究对象,对干流和支流中重金属元素的分布与富集情况进行了研究。结果表明,重金属在水相与悬浮物中的含量表现出相反的季节性变化特征,枯水期悬浮物吸附重金属的能力较强,丰水期悬浮物解吸附重金属的能力较强;支流悬浮物中重金属的含量、变异系数和分配系数大于干流,不同江段重金属含量表现为：江苏段〉安徽段〉上海段。

Distribution and Transport of Heavy Metals in Water Phase and Suspended Matter in Lower Yangtze River

With water and suspended matter from lower Yangtze river as the researched objects,the distribution and enrichment condition of heavy metals in main stream and tributaries was studied.The results showed that the contents of heavy metals in water phase showed opposite seasonal variation characteristics with those in suspended matter.The adsorption capacity of suspended matter on heavy metals was stronger in dry season and the desorption capacity of it on heavy metals was stronger in wet season.The contents,variation coefficient and partition coefficient of heavy metals in suspended matter in tributary were higher than those in main stream.The contents of heavy metals in different section showed as Jiangsu section>Anhui section >Shanghai section.