中国水产科学研究院机构知识库

Thallium concentrations and sources in the surface sediments of Bohai Bay

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文献类型：外文期刊

作者： Duan, Liqin ¹ ; Song, Jinming ¹ ; Li, Xuegang ¹ ; Yuan, Huamao ¹ ; Li, Ning ¹ ; Xu, Yayan ³ ;

作者机构： 1.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Ecol & Environm Sci, Qingdao 266071, Peoples R China

2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China

3.Chinese Acad Fisheries Sci, E China Sea Fisheries Res Inst, Minist Agr, Key Lab Marine & Estuary Fisheries, Shanghai 200090, Peoples R China

关键词： thallium;sequential extraction;environmental impact;sources;sediments;Bohai bay

期刊名称：MARINE ENVIRONMENTAL RESEARCH （影响因子：3.13；五年影响因子：4.368 ）

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收录情况： SCI

摘要： The Tl concentrations and chemical speciation were determined in the surface sediments of Bohai Bay to evaluate its biogeochemical characteristics. The total Tl concentrations were in the range of 0.506 -0.770 μg/g and correlated significantly with clay and total organic carbon (TOC) contents, suggesting that the grain size and TOC were major factors controlling Tl distribution. The sequential extraction performed to indicate Tl speciation and availability in Bohai Bay sediments suggested that Tl occurred mainly in the residual fraction and Tl came mainly from natural input. In the non-residual fractions, Fe -Mn oxide and organic matter fractions accounted for the main portions, suggesting that the labile Tl adsorption was dominated by Fe-Mn oxides and organic matter. In addition, according to our estimate, about 2.7 t/yr and 0.16 t/yr of Tl reached Bohai Bay via rivers and atmosphere, respectively.

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