Mercury’s source input paths to Jiaozhou Bay

¹ Accountancy Shool, Xijing University, Xian 710123, China ;
² North China Sea Environmental Monitoring Center, SOA, Qingdao 266033, China ;

^* Corresponding author: dfyang_dfyang@126.com

Abstract

This paper analyzed the source input paths of mercury (Hg) in Jiaozhou Bay using investigation data in surface waters in April, July and October 1989. Results showed that Hg contents in surface waters in the whole year ranged from 0.002-0.449 μg L-1, and in April, July and October were 0.035-0.449 μg L-1, 0.002-0.059 μg L-1 and 0.002-0.028 μg L-1, respectively. The pollution levels of Hg in April, July and October were moderate, slight and little, respectively. River discharge, atmosphere deposition and marine current were the three major Hg sources, whose source strengths were 0.026-0.449 μg L-1, 0.059 μg L-1 and 0.026-0.028 μg L-1, and the pollution levels were moderate, slight and little, respectively. In general, the pollution level of Hg in surface waters in Jiaozhou Bay were mainly determined by source inputs. Furthermore, a block diagram model was provided to demonstrate the input paths of Hg to Jiaozhou Bay.