Thallium concentrations and sources in the surface sediments of Bohai Bay

文献类型: 外文期刊

第一作者: Duan, Liqin

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

作者机构:

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 )

ISSN:

年卷期:

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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.

分类号: X

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