Behavior of suspended particles in the Changjiang Estuary: Size distribution and trace metal contamination.
Behavior of suspended particles in the Changjiang Estuary: Size distribution and trace metal contamination.
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DOI：
10.1016/j.marpolbul.2015.12.026
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发表时间：
2016-02
影响因子：
5.8
通讯作者：
Qingzhen Yao;Xiaojing Wang;Huimin Jian;Hong-tao Chen;Zhigang Yu
中科院分区：
文献类型：
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作者：
Qingzhen Yao;Xiaojing Wang;Huimin Jian;Hong-tao Chen;Zhigang Yu
2011年6月在长江口沿盐度梯度采集了悬浮颗粒物（SPM）样本。使用定制的水洗脱装置将悬浮沉积物分离成五个大小的馏分。结果表明，Cr、Pb来源于自然风化作用，Cu、Zn、Cd来源于其他因素。大多数微量金属在不同粒径上的分布随粒径的减小而增大。铁锰比和有机质含量对重金属含量的增加起重要作用。在中低盐度区，随着盐度的增加，Cu、Pb、Zn和Cd的含量变化显著，表明Cu、Pb、Zn和Cd颗粒的释放。因此，被污染的细颗粒向公海的转移可能伴随着污染物向溶解隔间的释放，从而放大了对海洋生物的潜在有害影响。
Suspended particulate matter (SPM) samples were collected along a salinity gradient in the Changjiang Estuary in June 2011. A custom-built water elutriation apparatus was used to separate the suspended sediments into five size fractions. The results indicated that Cr and Pb originated from natural weathering processes, whereas Cu, Zn, and Cd originated from other sources. The distribution of most trace metals in different particle sizes increased with decreasing particle size. The contents of Fe/Mn and organic matter were confirmed to play an important role in increasing the level of heavy metal contents. The Cu, Pb, Zn, and Cd contents varied significantly with increasing salinity in the medium–low salinity region, thus indicating the release of Cu, Pb, Zn, and Cd particles. Thus, the transfer of polluted fine particles into the open sea is probably accompanied by release of pollutants into the dissolved compartment, thereby amplifying the potential harmful effects to marine organisms.