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Removal of trivalent and pentavalent arsenic from water using chemically modified chitosan beads
Indian Journal of Chemical Technology ( IF 0.5 ) Pub Date : 2021-02-02
Ashutosh Kumar Singh, Saurav Kumar, Neeraj Kumar, A R Singh, S P Shukla

A novel process for chemical modification of chitosan with iron oxide and potassium permanganate was developed and the beads of the modified material have been prepared for the removal of the two forms of the metalloid Arsenic - As(III) and As(V)from water in the concentration range 5-40 mg L-1. The maximum adsorption capacity (pH 7.0) is 43.28 and 32.26 mg g-1 for As(III) and As(V), respectively. The chemically modified chitosan beads are regenerated for successive treatment cycles through alkali treatment. The regenerated beads show negligible loss in their removal efficiency of As(III) and As(V). Overall, the study provides a novel process for fabrication of low-cost composite material of chitosan for enhanced removal of Arsenic. This report will facilitate the development and up-scaling of low-cost treatment technologies for adsorptive removal of Arsenic from water.

中文翻译:

使用化学修饰的壳聚糖珠粒去除水中的三价和五价砷

开发了一种用氧化铁和高锰酸钾对壳聚糖进行化学修饰的新方法,并制备了该修饰材料的珠粒,用于从水中去除两种形式的准金属砷-As(III)和As(V)。浓度范围5-40 mg L -1。最大吸附容量(p H 7.0)为43.28和32.26 mg g -1分别用于As(III)和As(V)。经过化学修饰的壳聚糖微珠可通过碱处理进行连续的处理循环。再生的珠粒对As(III)和As(V)的去除效率损失可忽略不计。总体而言,该研究提供了一种低成本生产壳聚糖的复合材料的新工艺,该工艺可提高砷的去除率。该报告将促进低成本处理技术的发展和规模化,以从水中吸附去除砷。
更新日期:2021-02-02
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