Mercury Content Transported from Atmosphere and Land to Jiaozhou Bay

Abstract

According to the data of May, August and October 1992, the range of Hg content in Jiaozhou Bay waters was 0.009-0.050 μg /L, which met the water quality standard of class I sea water. This showed that in terms of Hg content, in May, August and October, the water of Jiaozhou Bay was clean and free from any Hg pollution. In May, the range of Hg content in Jiaozhou Bay waters was 0.009-0.038 μg /L. In August, the range of Hg content in Jiaozhou Bay waters was 0.021-0.050 μg/L. In October, the range of Hg content in Jiaozhou Bay waters was 0.011-0.040 μg /L. There were two sources of Hg content in Jiaozhou Bay waters, surface runoff and atmospheric deposition. The Hg content from surface runoffwas 0.038-0.040 μg /L, and that from atmospheric deposition was 0.050 μg /L. The model diagram was established to show the different paths and contents of Hg content in the process of input into Jiaozhou Bay. In May and October, the surface runoff was not polluted by any Hg content. In August, atmospheric deposition was not contaminated by any Hg content. That revealed that Hg, humans issued to land and atmosphere, finally got to the ocean. There were two paths. One is that human beings discharge Hg into the atmosphere, and the Hg content reached into the ocean through atmospheric sedimentation. The Hg content from atmospheric sedimentation was relatively high, but the transportation time was relatively short. The other is that human beings discharge Hg content to the land. Through surface runoff, the Hg content reached into the ocean, and the Hg content from surface runoff was relatively low, but the transportation time was relatively short. With more and more paths, Hg content was decreasing.

Influence of Human Activity on Hg Transportation

“…It has an area of about 446 km 2 and an average water depth of about 7 m. There are many rivers enter Jiaozhou Bay. Around the bay, appear Haibo River, Licun River and Loushan River and so on [12][13].…”

“…With the increase of Hg discharged by industries to the environment, Hg content appears in the land, atmosphere and ocean. Hg content sources and its pollution degree in the coastal waters have attracted people's attention [1][2][3][4][5][6][7][8][9][10][11][12][13][14]. According to the data from 1993, this study examines the Hg content level, horizontal distribution and sources in the waters, which show the water quality, background sources, and Hg quantity in Jiaozhou Bay, determining the matter water theory for maintaining sustainable ecological development.…”