Riverine composition and estuarine geochemistry of particulate metals in China - Weathering features, anthropogenic impact and chemical fluxes
Riverine composition and estuarine geochemistry of particulate metals in China - Weathering features, anthropogenic impact and chemical fluxes
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DOI：
10.1006/ecss.2001.0879
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发表时间：
2002-06-01
影响因子：
2.8
通讯作者：
Liu, CL
中科院分区：
文献类型：
--
作者：
Zhang, J;Liu, CL
对中国大中型河口（包括鸭绿江、双台子河、滦河、椒江和珠江）的悬浮沉积物进行了分析，以了解沿海地区的痕量金属迁移。 13 种主量元素和微量元素以及有机碳的测定是根据总浓度进行的，并经过有证标准物质 (CRM) 的充分验证。该数据集与长江和黄河等中国其他河口的数据相结合，提供了该地区颗粒痕量金属地球化学的概述。与欧洲和北美工业化地区的河流相比，中国河流中的微量金属含量相对较低。在河口，尽管总悬浮物（TSM）在时间和空间上有很大差异，但大多数颗粒元素在盐度为 30 之前都在混合区稳定分布，特别是当绝对浓度标准化为铝时。以Al为参考，预测椒江、双台子河和珠江的不稳定部分可能残留有25-40%的Cu和5-20%的Pb，而昌江和滦河的不稳定元素特征有所不同。平均富集因子（EFm）随着流域污水与河流径流比（S/R）和EFm的增加而增加，因为悬浮物高于底部沉积物。最后，根据河流沉积物负荷和化学成分估算了进入海岸的颗粒微量金属的输入量。 (C) 2002 Elsevier Science Ltd. 保留所有权利。
Suspended sediments from large and middle size Chinese estuaries, including the Yalujiang, Shuangtaizihe, Luanhe, Jiaojiang and Zhujiang, were analysed to understand trace metal transport in the coastal zone. The determinations of 13 major and trace elements plus organic carbon were made of total concentrations and were fully validated by certified reference materials (CRMs). The combination of the data sets with other Chinese estuaries, such as Changjiang and Huanghe, provides an overview of particulate trace metal geochemistry in this region. Trace metal levels in Chinese rivers are relatively low compared with those draining industrialized regions of Europe and North America. In the estuaries, most particulate elements illustrate stable distribution in the mixing zone until a salinity of 30, especially when absolute concentrations are normalized to aluminium, although the total suspended matter (TSM) is quite different in time and space. Using Al as a reference, it was estimated that 25-40% for Cu, and 5-20% for Pb could remain in labile part in the Jiaojiang, Shuangtaizihe and Zhujiang, whereas different features of labile elements were found in the Changjiang and Luanhe. The mean enrichment factor (EFm) increases with higher sewage to river runoff ratio (S/R) over the drainage basin and EFm, for suspended matter is higher than that for bottom sediments. Finally, inputs of particulate trace metals to the coast are estimated based on the riverine sediment load and chemical compositions. (C) 2002 Elsevier Science Ltd. All rights reserved.