Distribution of thallium in the Bohai Sea: implications for hydrodynamic forces and anthropogenic impact
Distribution of thallium in the Bohai Sea: implications for hydrodynamic forces and anthropogenic impact
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渤海铊的分布：对水动力和人为影响的影响
DOI：
10.1007/s12665-016-5727-x
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发表时间：
2016-05
期刊：
影响因子：
--
通讯作者：
Shi Xuefa
中科院分区：
文献类型：
--
作者：
Hu Ningjing;Huang Peng;Liu Jihua;Shi Xuefa
根据渤海表层沉积物中总铊和铊化学形态分析数据，研究了渤海沉积物中铊的分布、来源和归宿。铊浓度在细粒沉积物中表现出一定的富集趋势，表明泥质沉积物是陆源铊的汇，区域海流和潮汐系统对沉积物的分选和铊在BS中的富集起着关键作用。低的Tl富集因子和高比例的Tl在残留馏分中表明，Tl主要来自于天然来源，虽然BS是在激烈的环境压力下，因为过量的废水排放。在六股河河口处观察到局部铊污染，由于区域海流的影响，这种污染不会延伸到BS的内陆架之外。非残留部分中的Tl水平非常低，并且由Fe-Mn氧化物部分中的Tl水平主导，表明Tl在BS中表现出低的迁移率和生物利用度。铊含量与MnO和Fe 2 O3的相关性以及铁锰氧化物组分中相对较高的铊含量表明MnO和Fe 2 O3影响了铊在BS中的地球化学行为。Tl的可氧化部分可以忽略不计，这表明总有机碳（TOC）可能不是影响BS中Tl积累的主要因素，尽管样品中Tl和TOC之间存在正相关性。
The distribution, sources, and fate of sedimentary thallium (Tl) in the Bohai Sea (BS) were studied on the basis of datasets of total Tl and chemical speciation of Tl in surface sediment samples. The Tl concentration exhibits a certain trend of accumulation in the fine-grained sediment, suggesting that the mud deposits are sinks for land-originated Tl and that the regional currents and tide systems play a key role in the sorting of sediment and accumulation of Tl in the BS. The low Tl enrichment factor and high proportion of Tl in the residual fraction indicated that Tl is mainly derived from a natural source, although the BS is under intense environmental pressure because of excess wastewater discharge. Local Tl contamination was observed at the Liuguhe River mouth, and this contamination does not extend to beyond the inner shelves of the BS because of the regional currents. The level of Tl in the nonresidual fraction is very low and is dominated by the level of Tl in the Fe–Mn oxide fraction, indicating that Tl exhibits low mobility and bioavailability in the BS. The correlations between Tl concentration and MnO and Fe2O3and the relatively high level of Tl in Fe–Mn oxide fraction suggested that MnO and Fe2O3influence the geochemical behavior of Tl in the BS. The oxidizable fraction of Tl is negligible, suggesting that total organic carbon (TOC) might not be a major factor influencing the accumulation of Tl in the BS, although there is a positive correlation between Tl and TOC in the samples.
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影响因子：
6.1
作者：
R. Martín;D. M. Sánchez;A. Gutiérrez
通讯作者：
R. Martín;D. M. Sánchez;A. Gutiérrez
影响因子：
3.9
作者：
A. D. Matthews;J. P. Riley
通讯作者：
A. D. Matthews;J. P. Riley
影响因子：
2.9
作者：
M. P. Dahal;G. Lawrance
通讯作者：
M. P. Dahal;G. Lawrance
影响因子：
5
作者：
DAVIS, JA
通讯作者：
DAVIS, JA
影响因子：
8.9
作者：
Gu, Yang-Guang;Wang, Zhao-Hui;Shu, Yong-Hong
通讯作者：
Shu, Yong-Hong