Contamination by arsenic and other trace elements in tube-well water and its risk assessment to humans in Hanoi, Vietnam
Contamination by arsenic and other trace elements in tube-well water and its risk assessment to humans in Hanoi, Vietnam
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DOI：
10.1016/j.envpol.2005.04.033
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发表时间：
2006-01-01
影响因子：
8.9
通讯作者：
Tanabe, S
中科院分区：
文献类型：
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作者：
Agusa, T;Kunito, T;Tanabe, S
2001年9月，在越南河内市郊区的Gia Lam区和Thanh Tri区收集了地下水（n=25）和人发（n=59），检测了As和其他微量元素的浓度及其相互关系。地下水中砷的浓度从< 0.10至330 μ g/l不等，其中约40%超过了世卫组织饮用水指南的10 μ g/l。此外，76%和12%的地下水样本的锰和钡浓度分别高于世卫组织饮用水准则。家林区和青翠区居民头发中的砷浓度（0.088-2.77 μ g/g干重）低于世界其他砷污染地区，但高于非污染地区。Gia Lam和Thanh Tri地区一些人的头发中砷和锰的浓度超过了与其毒性相关的水平，因此，对该地区饮用受污染水的人来说，砷和锰的潜在健康风险是一个值得关注的问题。据估计，目前累积砷暴露量低于阈值水平，这可能解释了嘉林区和青翠区居民没有出现慢性砷中毒和砷中毒的表现。据我们所知，本研究首次揭示了越南红河三角洲地区居民不仅暴露于砷，而且还暴露于地下水中的锰和钡。(c) 2005 Elsevier Ltd版权所有。
Concentrations of As and other trace elements and their association were examined in groundwater (n=25) and human hair (n=59) collected at Gia Lam District and Thanh Tri District, suburban areas of Hanoi, Vietnam, in September 2001. Concentrations of As in the groundwater ranged from < 0.10 to 330 mu g/l, with about 40% of these exceeding WHO drinking water guideline of 10 mu g/l. Also, 76% and 12% of groundwater samples had higher concentrations of Mn and Ba than WHO drinking water guidelines, respectively. Arsenic concentrations in hair of residents in Gia Lam and Thanh Tri Districts (range 0.088-2.77 mu g/g dry wt.) were lower than those in other As-contaminated areas of the world, but were higher than those of people in noncontaminated areas. Concentrations of As and Mn in hair of some individuals from the Gia Lam and Thanh Tri Districts exceeded the level associated with their toxicity and, therefore, a potential health risk of As and Mn is a concern for the people consuming the contaminated water in this area. Cumulative As exposure was estimated to be lower than the threshold levels at the present, which might explain the absence of manifestations of chronic As poisoning and arsenicosis in the residents of Gia Lam and Thanh Tri Districts. To our knowledge, this study revealed for the first time that the residents are exposed not only to As but also Mn and Ba from groundwater in the Red River Delta, Vietnam. (c) 2005 Elsevier Ltd. All rights reserved.