[A-GE05] Subsurface Mass Transport and Environmental Assessment

[AGE05-P01] Effects of pH on Arsenic Removal Using Magnesium-Based Adsorbents

*杉田 創¹、張 銘¹、小熊 輝美¹、原 淳子¹ (1.国立研究開発法人産業技術総合研究所)

キーワード：Arsenic Removal, Adsorbent, Magnesium Oxide, Magnesium Hydroxide, pH

In some areas of developing countries, health damage caused by arsenic contained in groundwater used as drinking water has been a serious problem. In order to utilize the ground water as safe drinking water without health risk, it is necessary to remove arsenic. In our previous studies, the arsenic removal tests using several kinds of magnesium compounds (chloride, sulfide, oxide, hydroxide, and carbonate) were carried out and the results clarified that both the oxide and the hydroxide have particularly high arsenic removal performance among the magnesium compounds. However, the effects of pH on the arsenic removal performance of the magnesium compounds have not been sufficiently examined. Therefore, in this study, the arsenic removal behaviors of both magnesium oxide and hydroxide were estimated using the arsenic contaminated water with various pH (pH3 to 12).