赤泥
砷
吸附
吸热过程
化学
铝土矿
水溶液
放热反应
无机化学
朗缪尔吸附模型
弗伦德利希方程
砷酸盐
朗缪尔方程
核化学
金属
放热过程
废水
朗缪尔
吸附
环境化学
有机化学
物理化学
作者
H. Soner Altundoğan,Sema Altundoğan,Fikret Tümen,Memnune Bildik
标识
DOI:10.1016/s0956-053x(00)00031-3
摘要
Use of red mud, which is a waste product from bauxite processing, has been explored as an alternate adsorbent for arsenic in this study. The tests showed that the alkaline aqueous medium (pH 9.5) favored the removal of As(III), whereas the pH range from 1.1 to 3.2 was effective for As(V) removal. The process of arsenic adsorption follows a first-order rate expression and obeys the Langmuir's model. It was found that the adsorption of As(III) was exothermic, whereas As(V) adsorption was endothermic. It would be advantageous to use this residue as an adsorbent replacing polyvalent metal salts.
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