Sorption and desorption of perchlorate on surfactant-modified zeolite

摘要：

Batch sorption experiments were conducted to evaluate the performance of surfactantmodified zeolite (SMZ) as an inexpensive sorbent material for perchlorate (ClO4 -) removal from contaminated waters. The 14-40 mesh SMZ had a ClO4 - sorption capacity of 98 mmol kg-1 (roughly 1 ClO4 - per anion exchange site), better than strong base anion exchange resins (~ 1 ClO4 - per 5 anion exchange sites) when the sorption capacity was normalized to anion exchange capacity. Batch desorption experiments were also conducted to determine the optimum solution for regenerating spent SMZ. A 1.5-M NO3 - solution was found to be most effective in exchanging sorbed ClO4 - from SMZ, i.e., >90％ ClO4 - desorbed after ten consecutive extractions, each with a solution volume 5 times the volume of SMZ. The regenerated SMZ still had a ClO4 - sorption capacity of >70 mmol kg-1.

作者: P. Zhang A. B. M. B. U. Pathan

作者单位: Department of Earth and Atmospheric Sciences, City College of New York, New York, NY 10031, USA

会议类型: 国际会议

会议名称: 第15届国际分子筛大会

会议地点: 北京

会议语种:英文

在线出版日期: 2007-08-12（万方平台首次上网日期，不代表论文的发表时间）