Dissolved inorganic tin sources and its coupling with eco-environments in Bohai Bay |
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| Authors: | Liqin Duan Jinming Song Xuegang Li Huamao Yuan Sisi Xu |
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| Institution: | (1) Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, 7# Nanhai Road, Qingdao, Shandong, 266071, People’s Republic of China;(2) Graduate University of Chinese Academy of Sciences, Beijing, 100049, People’s Republic of China;(3) Fishery Design Institute of Shandong Province, Ji’nan, Shandong, 250013, People’s Republic of China |
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| Abstract: | Dissolved inorganic tin (DISn) and its spatial variation were examined in Bohai Bay seawaters to understand the DISn behavior
and pollution in this area. DISn concentration gradually increased with the distance from the coast and showed a slight decrease
with the increasing depth from surface water, suggesting the scavenged behavior of tin with an atmospheric input to surface
water. Besides, the higher DISn values also were found near the Haihe Estuary inferring that the riverine input was a source
of DISn. Based on the data in this study, a preliminary estimate of the tin budget via riverine input and atmospheric deposition
has been established. According to our estimate, about 2 × 106 and 8.47 × 105 g/year of tin reach Bohai Bay via rivers and atmosphere. Environmental factors such as suspended particulate material, salinity,
total organic matter, pH, nutrients, and phytoplankton had the important influences on DISn distribution. Among them, the
negative correlation between DISn and phytoplankton at most stations might indicate the biological uptake of tin. |
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