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Based on the investigation data on As in surface and bottom waters in the bay mouth of Jiaozhou Bay in 1983, this paper analyzed the seasonal variations, vertical variations and horizontal distributions of As. Results showed that As contents in surface waters in different seasons were in order of summer > autumn > spring, while in bottom waters were autumn > spring > summer. The horizontal distributions of As in surface and bottom waters were consistent in May, while in September and October were reverse. We found that the vertical distributions of As and were mainly determined by the influences of pollution sources.

The influences of pollution sources on the vertical distributions of As in Jiaozhou Bay waters