Arsenic removal from aqueous solutions by adsorption on red mud
Arsenic removal from aqueous solutions by adsorption on red mud
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DOI：
10.1016/s0956-053x(00)00031-3
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发表时间：
2000-12
期刊：
影响因子：
8.1
通讯作者：
H. Altundoğan;Sema Altundoğan;F. Tümen;M. Bildik
中科院分区：
文献类型：
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作者：
H. Altundoğan;Sema Altundoğan;F. Tümen;M. Bildik
在本研究中，已探索使用赤泥（铝土矿加工的废品）作为砷的替代吸附剂。测试表明，碱性水介质（pH 9.5）有利于As（III）的去除，而pH范围1.1至3.2对As（V）的去除有效。砷的吸附过程遵循一阶速率表达式并服从Langmuir 模型。结果发现，As(III)的吸附是放热的，而As(V)的吸附是吸热的。使用该残余物作为吸附剂替代多价金属盐将是有利的。
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.