Sources and leaching of manganese and iron in the Saigon River Basin, Vietnam.
Sources and leaching of manganese and iron in the Saigon River Basin, Vietnam.
复制标题
越南西贡河流域锰和铁的来源和浸出。
DOI：
10.2166/wst.2011.460
复制
发表时间：
2011
影响因子：
2.7
通讯作者：
N. V. Phước
中科院分区：
文献类型：
--
作者：
Nguyen Thi Song Ha;S. Takizawa;K. Oguma;N. V. Phước
西贡河中锰和铁的高浓度是越南胡志明市（HCMC）供水的主要问题。为了确定其来源和浸出过程，我们调查了水质沿着西贡河和运行批次浸出测试使用土壤和沉积物样品。两个重要的淋溶过程被确定为：从酸性硫酸盐土壤（ASS）在中游的河流，和Mn的溶解和Fe还原从沉积物在下游河段的酸性淋溶。低pH值导致Fe和Mn从ASS中同时释放。与此相反，缺氧引起的释放铁，但不是锰从沉积物中，而低pH值促进锰溶解。沉积物是一个更重要的锰源，因为它们的锰含量（10倍）和释放速率（14倍）比那些从ASS。
High concentrations of manganese and iron in the Saigon River are major problems for the water supply in Ho Chi Minh City (HCMC), Viet Nam. To identify their sources and leaching processes, we surveyed water quality along the Saigon River and ran batch leaching tests using soil and sediment samples. Two important leaching processes were identified: acidic leaching from acid sulfate soil (ASS) in the middle reaches of the river, and Mn dissolution and Fe reduction from sediments in the downstream reaches. Low pH caused the concurrent release of Fe and Mn from the ASS. In contrast, anoxia caused the release of Fe but not Mn from the sediments, whereas low pH facilitated Mn dissolution. Sediments are a more important source of Mn because of their higher Mn contents (10 times) and release rates (14 times) than those from ASS.