Distribution, enrichment and sources of heavy metals in surface sediments of the North Yellow Sea
Distribution, enrichment and sources of heavy metals in surface sediments of the North Yellow Sea
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北黄海表层沉积物重金属分布、富集及来源
DOI：
10.1016/j.csr.2013.11.014
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发表时间：
2014-02-01
影响因子：
2.3
通讯作者：
Hu, Ning-jing
中科院分区：
文献类型：
--
作者：
Huang, Peng;Li, Tie-gang;Hu, Ning-jing
研究了北黄海表层沉积物中重金属的分布、来源、年沉降和大气沉降通量。西部细粒沉积物和沿海地区的重金属含量普遍较高，呈东、北两向递减趋势。研究金属的富集因子（EFs）顺序为Pb > Cd > Cu > Zn > Ni > Cr > Co > Mn。电磁场值表明，西北地区的Pb、Cd和Cu既有人为输入，也有自然输入，而东北东部和北部的Pb、Cd和Cu以及东北地区的Zn、Cr、Ni和Co主要来自自然来源，包括河流输送到东北地区的陆地风化和大气沉积。铜、铬、镍和铅是纽约州最受关注的四种金属。滇西地区重金属年沉降通量为Fe， 1.34 × 10(6) t/yr；Mn, 1.953 × 10(4) t/yr；Cu, 9.4 × 10(2) t/yr；Zn, 3.09 × 10(3) t/年；Pb, 1.13 × 10(3) t/年；Cd， 4.91吨/年；Cr, 1.271 × 10(4) t/yr；Ni, 1.22 × 10(3) t/yr；和Co， 4.9 × 10(2) t/年。这些金属的年干沉降通量表明，大气中颗粒金属（Zn、Pb和Cd）的沉降在生物地球化学循环中也起着重要作用。(C) 2013 Elsevier Ltd.版权所有。
The distributions, sources, annual sedimentation and atmospheric deposition flux of heavy metals in surface sediments of the North Yellow Sea (NYS) were investigated. Higher concentrations of the studied metals were generally observed in the western fine-grained sediments and coastal region, and the concentration decreased both in easterly and northerly direction. The sequences of the enrichment factors (EFs) of the studied metals are Pb > Cd > Cu > Zn > Ni > Cr > Co > Mn. The values of EFs suggested that Pb, Cd and Cu in the northwestern region originated from both anthropogenic and natural inputs, while Pb, Cd and Cu in the eastern and northern NYS as well as Zn, Cr, Ni, and Co in the NYS mainly come from natural sources including terrestrial weathering delivered to NYS through rivers and atmospheric deposition. Cu, Cr, Ni and Pb are the four metals with more ecotoxicological concern in the NYS. The annual sedimentation fluxes of heavy metals in the west part of NYS were Fe, 1.34 x 10(6) t/yr; Mn, 1.953 x 10(4) t/yr; Cu, 9.4 x 10(2) t/yr; Zn, 3.09 x 10(3) t/yr: Pb, 1.13 x 10(3) t/yr; Cd, 4.91 t/yr; Cr, 1.271 x 10(4) t/yr; Ni, 1.22 x 10(3) t/yr; and Co, 4.9 x 10(2) t/yr. Annual dry deposition flux of these metals indicated that the particulate metals (Zn, Pb and Cd) deposition via atmosphere also plays an important role in biogeochemical cycles in the NYS. (C) 2013 Elsevier Ltd. All rights reserved.