湘江株洲段表层水重金属含量及存在形态分布研究

以国家Ⅲ类水质限值为标准,总体来讲,湘江株洲段河水中Cu、Pb、Zn和Cd的总量均不超标,Cd的污染较重。霞湾断面的污染最重,清水塘工业区铅锌冶炼和化工企业是其污染的主要来源。采用化学分析的方法,对湘江株洲段水体中的Cu、Pb、Zn和Cd进行了形态分析,Cu、Zn溶解态在各断面均大于50%;Pb、Cd的形态在不同的断面其所占比例不一样。监测了各水质参数,pH大都在7.5左右,Eh在200~300mv之间,为氧化的环境,COD大部分断面均在15~20mg/L以下。

Study on Heavy Metal Element Content and Existence Form in Surface Water at Zhuzhou Section of Xiangjing River

According to the National Grade III,the contents of Cu,Pb,Zn and Cd in Zhuzhou Section of Xiangjing River were not higher than the standard on the whole,of which the pollution of Cd was relatively heavy.The water was polluted most seriously at Xiawan section,where the pollution came from Lead-Zinc smelting and chemical enterprises in Qingshuitang Industrial Park.Morphological analysis was conducted for the elements of Cu,Pb,Zn and Cd at Zhuzhou Section of Xiangjing River.The results showed that the dissolved forms of Cu and Zn were higher than 50% at every section,and the proportions of the forms for Pb and Cd were variable at different sections.According to the water quality monitoring,pH was 7.5 more or less.The Eh ranged in 200~300mv which ment an oxidation environment.The COD was below 15~20mg/L at most sections.