Efficient removal of arsenic from polluted ground water by using a layered double hydroxide exchanger

被引:0
作者
Bhaumik, A [1 ]
Samanta, S
Mal, NK
机构
[1] Indian Assoc Cultivat Sci, Dept Mat Sci, Kolkata 700032, W Bengal, India
[2] Natl Inst Advance Inst Sci & Technol, Dynam Mat Res Grp, Ikeda, Osaka 5638577, Japan
来源
INDIAN JOURNAL OF CHEMISTRY SECTION A-INORGANIC BIO-INORGANIC PHYSICAL THEORETICAL & ANALYTICAL CHEMISTRY | 2005年 / 44卷 / 07期
关键词
D O I
暂无
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Arsenic concentration in the polluted ground water has been sufficiently reduced from its alarming limit to a permissible one (similar to 0.02 mg/l) employing the intercalation behaviour of Layered Double Hydroxide (LDH) Mg-Al hydrotalcite. The exchange reaction was very simple and the efficiency of the process remained almost same in many cycles. This efficiency of arsenic removal from contaminated ground water has been drastically improved by pre-treatment with a small amount of dilute aqueous H2O2 to oxidize As(III) to As(V) under acid pH condition followed by its exchange with hydrotalcite. After few exchange cycles the solid exchanger could be easily exchanged with a saturated NaCl solution to regenerate the LDH for further use.
引用
收藏
页码:1406 / 1409
页数:4
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