Reductive transformation of 2-nitrophenol by Fe(II) species in gamma-aluminum oxide suspension

文献类型： 外文期刊

第一作者： Tao, Liang

作者： Tao, Liang;Li, Fangbai;Sun, Kewen;Tao, Liang;Sun, Kewen;Feng, Chunhua;Tao, Liang;Sun, Kewen

作者机构：

关键词： gamma-Aluminum oxide;2-Nitrophenol;Fe(II) adsorption;Cyclic voltammetry;Fe(III)/Fe(II) redox potential

期刊名称：APPLIED CLAY SCIENCE （ 影响因子：5.467； 五年影响因子：5.414 ）

ISSN： 0169-1317

年卷期： 2009 年 46 卷 1 期

页码：

收录情况： SCI

摘要： Fe(II) adsorption onto gamma-Al(2)O(3) surfaces was studied in view of its high reactivity towards the aqueous reductive transformation of 2-NP. Kinetic measurements demonstrated that rates of 2-NP reduction were highly sensitive to pH, Fe(II) concentration and reaction temperature. An increase in pH, Fe(H) concentration or reaction temperature gave rise to an elevated density of Fe(II) adsorbed to mineral surfaces, which further resulted in an enhanced reaction rate of 2-NP reduction. By using the diffuse double layer (DDL) surface complexation model, the dominant Fe(II) surface complex that was responsible for the high reactivity was predicted to be the strongly bound SOFe(+) functional group (represented by Al(st)OFe(+)) onto gamma-Al(2)O(3) surfaces. In addition, cyclic voltammetry tests showed that the enhanced activity of Fe(II) species was attributed to the negative shift of the redox potential of Fe(III)/Fe(II) couple, resulted from the enhanced concentration of Al(st)OFe(+) complex. (C) 2009 Elsevier B.V. All rights reserved.

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