ZERO VALENT IRON TO REMOVE THE ARSENIC CONTAMINATION FROM NATURAL GROUNDWATER: BATCH AND COLUMN EXPERIMENT
Groundwater with high levels of arsenic has received much attention in some Asian countries due to its massive environmental alarm. Groundwater flowing throughout As-rich geologic stratum may become contaminated with high concentrations of toxic As, which can make its way into private and public water supply wells. So it is urgently needed to overcome the silent arsenic disaster to feed arsenic free drinking water to the people. Presently, zero valent iron (ZVI) is to be studied as an effective tool for cleanup of groundwater containing heavy metals. Thus, it has special attention due to its high adsorption capacity and strong affinity to remove arsenic from contaminated groundwater. This paper highlights the burgeoning use of zero valent iron for mitigation of arsenic from groundwater. A series of both batch and column experiments were conducted to evaluate arsenic removal capacity by ZVI with the effect of pH, Eh and Dissolved Oxygen (DO) content. The results showed that more than 99％ arsenic was removed in both batch and column experiment. In column experiment, efficient removal of arsenic was observed concentrations below the limit of 10 μg /L (WHOs Standard) in the treated waters. Arsenic removal capacity of zero valent iron was determined to be 2.5 mg As/g ZVI.
Arsenic zero valent iron groundwater
M.A.ABEDIN Takeshi KATSUMI Toru INUI Masashi KAMON
Graduate School of Global Environmental Studies, Kyoto University, Japan Takamatsu National College of Technology, Japan
国际会议
International Symposium on Geoenvironmental Engineering(国际环境岩土工程研讨会
杭州
英文
515-520
2009-09-08（万方平台首次上网日期，不代表论文的发表时间）