Relationship between oxidative degradation of 2-mercaptobenzothiazole and physicochemical properties of manganese (hydro)oxides

文献类型: 外文期刊

第一作者: Liu, C. S.

作者: Liu, C. S.;Zhang, L. J.;Wu, C. A.;Li, F. B.;Feng, C. H.;Liu, C. S.;Li, X. Z.

作者机构:

关键词: correlative analysis;manganese oxides;organic pollutants;oxidation

期刊名称:ENVIRONMENTAL CHEMISTRY ( 影响因子:3.088; 五年影响因子:4.417 )

ISSN: 1448-2517

年卷期: 2009 年 6 卷 1 期

页码:

收录情况: SCI

摘要: The oxidative reactivity of manganese (hydro) oxides is important for geochemical transformation of organic pollutants. Here, 2-mercaptobenzothiazole (MBT) degradation by six manganese (hydro) oxides, including gamma-MnOOH, beta-MnO(2), alpha-MnO(2), gamma-Mn(2)O(3), delta-MnO(2), and MO-700, were investigated with different initial MBT concentrations, manganese (hydro) oxide dosages and pH values. The results show the oxidative reactivity of manganese (hydro) oxides towards MBT degradation strongly depends on their physicochemical properties. Specific surface area and reduction potential of manganese (hydro) oxides were positively correlated with MBT degradation rates, whereas pH at the point of zero charge (pII(PZC)) of manganese (hydro) oxides and apparent activation energy (E(a)) were negatively correlated. A high average oxidation state with the same chemical valence always corresponds to high oxidative reactivity. Such findings provide some insights into understanding the transport and fate of organic pollutants in the presence of different manganese (hydro) oxides in the natural environment.

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