Removal of arsenic in aqueous solutions by adsorption onto waste rice husk
Removal of arsenic in aqueous solutions by adsorption onto waste rice husk
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DOI：
10.1021/ie060344j
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发表时间：
2006-11-22
影响因子：
4.2
通讯作者：
Ohta, Kiyohisa
中科院分区：
文献类型：
--
作者：
Amin, Md. Nurul;Kaneco, Satoshi;Ohta, Kiyohisa
稻壳作为地下水中砷的修复材料具有巨大的潜力。本文研究了稻壳吸附技术在不经预处理的情况下去除水中砷的可能性。研究了影响砷吸附/解吸的各种条件。吸附柱法在以下条件下均能完全去除As（III）和As(V)：初始As浓度为100 μ g/L；谷壳量，6克；平均粒径780、510 μ m；处理流量分别为6.7和1.7 mL/min；pH值分别为6.5和6.0。地下水处理后，1 M KOH的解吸效率在71 ~ 96%之间。目前的研究可能为实现孟加拉国和世界卫生组织（世卫组织）建议的饮用水所需的砷浓度提供新的途径。
Rice husk has tremendous potential as a remediation material for the removal of arsenic from groundwater. The present work investigates the possibility of the use of rice husk adsorption technology without any pretreatment in the removal of arsenic from aqueous media. Various conditions that affect the adsorption/desorption of arsenic are investigated. Adsorption column methods show the complete removal of both As(III) and As(V) under the following conditions: initial As concentration, 100 mu g/L; rice husk amount, 6 g; average particle size, 780 and 510 mu m; treatment flow rate, 6.7 and 1.7 mL/min; and pH, 6.5 and 6.0, respectively. The desorption efficiencies with 1 M of KOH after the treatment of groundwater were in the range of 71-96%. The present study might provide new avenues to achieve the arsenic concentrations required for drinking water recommended by Bangladesh and the World Health Organization (WHO).