Department of Chemistry, NIT, Rourkela 769008, India.
J Hazard Mater. 2011 Aug 30;192(2):899-908. doi: 10.1016/j.jhazmat.2011.05.099. Epub 2011 Jun 6.
The present work provides a method for removal of the arsenic (III) from water. An ion-exchanger hybrid material zirconium (IV) oxide-ethanolamine (ZrO-EA) is synthesized and characterized which is subsequently used for the removal of selective arsenic (III) from water containing 10,50,100mg/L of arsenic (III) solution. The probable practical application for arsenic removal from water by this material has also been studied. The various parameters affecting the removal process like initial concentration of As (III), adsorbent dose, contact time, temperature, ionic strength, and pH are investigated. From the data of results, it is indicated that, the adsorbent dose of 0.7mg/L, contact time 50min after which the adsorption process comes to equilibrium, temperature (25±2), solution pH (5-7), which are the optimum conditions for adsorption. The typical adsorption isotherms are calculated to know the suitability of the process. The column studies showed 98% recovery of arsenic from water especially at low concentration of arsenic in water samples.
本工作提供了一种从水中去除砷（III）的方法。合成并表征了一种离子交换剂杂化材料氧化锆（IV）-乙醇胺（ZrO-EA），随后用于去除含 10、50、100mg/L 砷（III）溶液的水中选择性砷（III）。还研究了该材料从水中去除砷的实际应用。研究了影响去除过程的各种参数，如初始砷（III）浓度、吸附剂剂量、接触时间、温度、离子强度和 pH 值。从结果数据来看，吸附剂剂量为 0.7mg/L，接触时间为 50min 后吸附过程达到平衡，温度（25±2）℃，溶液 pH 值（5-7），是吸附的最佳条件。计算了典型的吸附等温线，以了解该过程的适宜性。柱研究表明，特别是在水样中砷浓度较低的情况下，从水中回收砷的效率可达 98%。
