Arsenic Biogeochemistry Affected by Eutrophication in Lake Biwa, Japan (INTERFACE SCIENCE-Separation Chemistry)

Abstract

The seasonal variations of arsenic species were studied in the mesotrophic northern and eutrophic southern basins of Lake Biwa in Japan. The variations of arsenic species in lake water largely depend on biological processes, such as the metabolism of phytoplankton, decomposition of organic matter by bacteria, and microbial reduction of iron and manganese oxides in sediments. These results show that eutrophication affects the concentration and speciation of arsenic in the lake water.