Determination of AsIII/AsV ratio in alluvial sediments of the Bengal Basin using X-ray absorption near-edge structure
Determination of AsIII/AsV ratio in alluvial sediments of the Bengal Basin using X-ray absorption near-edge structure
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DOI：
10.1246/cl.2006.866
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发表时间：
2006-08-05
影响因子：
1.6
通讯作者：
Kusakabe, Minoru
中科院分区：
文献类型：
--
作者：
Itai, Takaaki;Masuda, Harue;Kusakabe, Minoru
在这项研究中，我们应用 X 射线吸收近边结构光谱 (XANES) 来测定孟加拉盆地沉积物中的 As-III/As-V 比率，该盆地的地下水砷污染会造成严重的健康危害。沉积物中As氧化态深度剖面表明，在地下水As浓度较高的深度，As-III为优势种。这一结果与各种现场观测中对无机砷物种迁移率的一般理解是一致的。
In this study, we applied X-ray absorption near-edge structure spectroscopy (XANES) to the determination of the As-III/ As-V ratios in sediments in the Bengal Basin, where groundwater contamination of As causes serious health hazard. The depth profile of oxidation state of As in sediment shows that As-III is dominant species in the depth where As concentration of groundwater is high. This result is consistent with the general understanding about mobility of inorganic As species in various field observations.