Arsenic removal by iron oxide coated sponge: Experimental performance and mathematical models
Arsenic removal by iron oxide coated sponge: Experimental performance and mathematical models
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DOI：
10.1016/j.jhazmat.2010.06.094
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发表时间：
2010-10-15
影响因子：
13.6
通讯作者：
Kandasamy, Jaya
中科院分区：
文献类型：
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作者：
Nguyen, Tien Vinh;Vigneswaran, Saravanamuthu;Kandasamy, Jaya
全世界数百万人因地下水中的砷而面临风险。通过吸附平衡实验和长期吸附实验，研究了氧化铁包被海绵（IOCSp）的除砷性能。结果表明，IOCSp对As（III）和As（V）的最大吸附容量分别为4.2和4.6mg/g IOCSp。用少量的25 g IOCSp填充的过滤器从含砷浓度高达1000 μ g/L的合成溶液中保持95%的一致的砷去除效率。在需要再生或处置IOCSp之前，这分别产生了153 L和178 L的含As（III）和As（V）的水的吞吐量。IOCSp可以通过用NaOH溶液洗涤来再生。用托马斯和尼古拉的改进模型成功地预测了动态吸附动力学。(C)2010 Elsevier BV保留所有权利。
Millions of people worldwide are at risk from the presence of arsenic in groundwater. In this study, adsorption equilibrium and long term experiments were carried out to evaluate the performance of iron oxide coated sponge (IOCSp) in arsenic removal. It was found that maximum adsorption capacity of IOCSp for As(III) and As(V) calculated by Sips isotherm was 4.2 and 4.6 mg/g of IOCSp, respectively. A filter packed with small amount of 25 g IOCSp maintained a consistent arsenic removal efficiency of 95% from synthetic solution containing arsenic concentration of as high as 1000 mu g/L. This produced a throughput volume of 153 and 178 L of water containing As(III) and As(V), respectively before any need for regeneration or disposal of IOCSp. IOCSp could be regenerated by washing it with NaOH solution. The dynamic (column) adsorption kinetics were successfully predicted by the Thomas and Nikolaidis modified models. (C) 2010 Elsevier B.V. All rights reserved.