北部湾北部海区砷含量及其分布

本文列举了1984年从北部湾45个观察站收集到的关于海水及底质砷含量的调查结果,并给出了海水及底质砷含量的分布图。砷含量高的地区主要分布在河口,尤其是钦州湾和铁山港。砷含量向外海递减,低位区位于近海区。海水砷含量的高低之差大约为1—5倍,底质砷含量的高低之差大约为5～10倍。调查结果表明虽然北部湾北部海区没有明显受到砷的污染,但由于手工业污染物的影响,河口底质砷污染程度已增加了。

DISTRIBUTION AND CONTENTS OF ARSENIC IN THE NORTHERN TOKYO GULF

This paper pretents the result of the study on the contents of arsenic in the seawater and bottom soil colleted from 45 stations of the northern Tokyo Gulf in 1984. The regional distribution figures of arsenic contents both in water and soil have heen given and analysed. The areas where there are high arsenic contents are found in estuary, especially in Qin zhou bay and Texang estuary. The contents decrease seaward and the lowercontnet areas lie offshore. The difference bettween high and low contents is about 1-5 times in seawater and 5-10 times in bottom soil, respectively.
The results of determination show that though the seawater of northern Tokyo Gulf has not been obviously polluted by arsenic, the arsenic pollutant in bottom soil in estuary has increased, because of the effect of industrial discharger.