Calcined Mg鈥揂l Layered Double Hydroxides for Uptake of Trace Levels of Bromate from Aqueous Solution
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- 作者：Ramesh Chitrakar ; Akinari Sonoda ; Yoji Makita ; Takahiro Hirotsu
- 刊名：Industrial & Engineering Chemistry Research
- 出版年：2011
- 出版时间：August 3, 2011
- 年：2011
- 卷：50
- 期：15
- 页码：9280-9285
- 全文大小：798K
- 年卷期：v.50,no.15(August 3, 2011)
- ISSN：1520-5045
文摘
Layered double hydroxides of Mg and Al (Mg鈥揂l LDH) were synthesized with OH鈥?/sup>, Cl鈥?/sup>, or CO32鈥?/sup> as charge compensating anions. The materials were calcined at 500 掳C in air. The bromate uptakes of calcined and uncalcined LDH materials were investigated from 0.78 渭mol/dm3 bromate solution. Results show that uncalcined LDH exhibited no bromate uptake, although calcined LDH exhibited bromate uptake: the initial bromate concentration of 0.78 渭mol/dm3 decreased to less than 0.078 渭mol/dm3, the maximum contaminant level established for bromate in drinking water. The rate of bromate uptake of calcined LDH was slow to attain equilibrium in 48 h. The bromate uptake data of calcined LDH agreed well with the Freundlich model.