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REDUCTIVE ACTIVITY OF ADSORBED Fe(II) ON IRON (OXYHYDR)OXIDES FOR 2-NITROPHENOL TRANSFORMATION

文献类型： 外文期刊

作者： Tao, Liang 1 ; Li, Fangbai 1 ; Wang, Yongkui 1 ; Sun, Kewen 3 ;

作者机构： 1.Guangdong Inst Ecoenvironm & Soil Sci, Guangdong Key Lab Agr Environm Pollut Integrated, Guangzhou 510650, Guangdong, Peoples R China

2.Chinese Acad Sci, Guangzhou Inst Geochem, Guangzhou 510640, Guangdong, Peoples R China

3.Wenzhou Med Coll, Inst Hlth & Environm Ecol, Wenzhou 325035, Zhejiang, Peoples R China

关键词： 2-nitrophenol;adsorbed Fe(II);cyclic voltammetry;Fe oxides;redox potential;reductive activity

期刊名称：CLAYS AND CLAY MINERALS （ 影响因子：1.609； 五年影响因子：2.162 ）

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收录情况： SCI

摘要： Much attention has been paid to the adsorption of Fe(II) onto mineral surfaces as it is a crucial step in enhancing the reductive activity of Fe(II) species. The present study elucidates the role of Fe(II) adsorbed on Fe (oxyhydr)oxides (γ-FeOOH, α-FeOOH, and α-Fe_2O_3) for the reductive transformation of 2-nitrophenol (2-NP), using cyclic voltammetry (CV). Studies of Fe(II) adsorption and 2-NP reduction kinetics showed that an increase in pH gave rise to an elevated density of adsorbed Fe(II) on mineral surfaces, which further resulted in an enhanced reaction rate of 2-NP reduction. In addition, CV tests showed that the enhanced activity of Fe(II) species is attributed to the negative shift of peak oxidation potential (E_P) of the Fe(III)/Fe(II) couple. The dependence of adsorbed Fe(II) reactivity on pH values was proven by the three linear correlations obtained (In k vs. pH, E_P vs. pH, and In k vs. E_P). The present study demonstrated that the reductive activity of adsorbed Fe(II) species can be indicated by the E_P value of active Fe(II) species. Moreover, the electrochemical approach can be used as an effective tool to study the reductive activity of adsorbed Fe(II) species in subsurface environments.

  • 相关文献

[1]Electrochemical evidence of Fe(II)/Cu(II) interaction on titanium oxide for 2-nitrophenol reductive transformation. Tao, Liang,Li, Fangbai. 2012

[2]Reductive transformation of 2-nitrophenol by Fe(II) species in gamma-aluminum oxide suspension. Tao, Liang,Li, Fangbai,Sun, Kewen,Tao, Liang,Sun, Kewen,Feng, Chunhua,Tao, Liang,Sun, Kewen. 2009

[3]The Dechlorination of Pentachlorophenol by Zerovalent Iron in Presence of Carboxylic Acids. Hou, Meifang,Wan, Hongfu,Zhou, Qixing,Liu, Xinming,Luo, Wei,Fan, Yanning.

[4]Effects of dissolved organic matter on adsorbed Fe(II) reactivity for the reduction of 2-nitrophenol in TiO2 suspensions. Zhu, Zhenke,Zhu, Zhenke,Tao, Liang,Li, Fangbai,Zhu, Zhenke. 2013

[5]Fe(II)/Cu(II) interaction on alpha-FeOOH, kaolin and TiO2 for interfacial reactions of 2-nitrophenol reductive transformation. Tao, Liang,Zhu, Zhenke,Li, Fangbai,Zhu, Zhenke,Zhu, Zhenke. 2013

[6]2-Nitrophenol reduction promoted by S-putrefaciens 200 and biogenic ferrous iron: The role of different size-fractions of dissolved organic matter. Zhu, Zhenke,Tao, Liang,Li, Fangbai,Zhu, Zhenke,Zhu, Zhenke. 2014

[7]Understanding the role of Fe(III)/Fe(II) couple in mediating reductive transformation of 2-nitrophenol in microbial fuel cells. Li, Fangbai,Liu, Liang,Tong, Hui,Feng, Chunhua,Feng, Chunhua,Liu, Yongye,Yue, Xianjun,Sun, Kewen.

[8]Effects of the Fe-II/Cu-II Interaction on Copper Aging Enhancement and Pentachlorophenol Reductive Transformation in Paddy Soil. Wang, Yong-kui,Tao, Liang,Chen, Man-jia,Li, Fang-bai,Wang, Yong-kui,Chen, Man-jia,Wang, Yong-kui,Chen, Man-jia. 2012

[9]Environmental pH and ionic strength influence the electron-transfer capacity of dissolved organic matter. Lu, Qin,Yuan, Yong,Tao, Ya,Tang, Jia. 2015

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