砷形态在湖水中垂直分布的研究

本文以天津水上公园湖泊作为研究现场，通过采样分析，研究了湖水中砷酸盐、亚砷酸盐、一甲基胂酸盐和二甲基胂酸盐的垂直分布及其影响因素。结果表明水上公园湖泊中砷酸盐是溶解态砷的主要存在形式，其垂直分布与悬浮物、叶绿素ａ、磷酸盐的浓度、水文等诸因素密切相关；一甲基胂酸盐含量保持相对稳定；光致转化是影响水中亚砷酸盐垂直分布差异的一个因素。

STUDY OF VERTICAL DISTRIBUTION OF ARSENIC SPECIES IN LAKE WATER

This paper studies the vertical concentration distribution of dissolved arsenate , arsenite , mono- and dimethylarsenate in the lake water in Shuishang park, Tianjin and some relevant influence factors. It is found that the major arsenic species is arsenate and that its vertical distribution is related to the factors including the concentrations of suspended material, chlorophyl-a, dissolved phosphate, etc, The monomethyl-arsenate concentration is the lowest of the four arsenic species and relatively stable in the water column . Photo-transformation is one of important factors affect-ine the vertical distribution of arsenite.