Aquatic Transfer Mechanism of Mercury in Jiaozhou Bay

Abstract

We analyzed the pollution sources and transfer processes of mercury (Hg) in Jiaozhou bay based on the investigation data during time periods of 1979 to 1985 (absent of 1984), and then proposed the transfer mechanism of Hg in waters. The high or low of Hg contents in surface and bottom waters in different regions could be defined based on the transfer mechanism.

Stages and Status of Vertical Transporting Process of Cd in Jiaozhou Bay

“…Sixth, the input of the input of Cd was stop, and the sedimentation of Cd was stop since Cd contents in surface waters were little, and Cd contents in surface and bottom waters were closed. These stages and status were revealing the vertical transporting process of Cd clearly, and were consistent with the vertical transporting process of other pollutants such as hexachlorocyclohexane, Hg and Cr [16][17][18][19][20].…”

“…Cd contents in surface waters were determined by variations of Cd input from the sources, while Cd contents in bottom waters were productions of which in surface waters and water's effect [16][17][18][19][20]. Cd contents in surface and bottom waters in different months during 1979-1983 were listed in Table 1 to Table 5, respectively.…”

Quantification of Sedimentation and Accumulation of Cd in Jiaozhou Bay

“…The vertical variation of Cd contents between surface and bottom waters were results of sedimentation and accumulation, which were determined by water's effect [16][17][18][19][20]. In order to defined the vertical variations, Cd contents in surface waters in each sampling sites in each month were subtracted by which in bottom waters, which were indicating that weather Cd in surface waters were higher or lower than in bottom waters.…”