Cr(Ⅵ)氧化1,2-丁二醇的动力学

doi:10.3969/j.issn.1000-1565.2008.05.013

摘要/Abstract

摘要： 采用分光光度法研究了在25～40 ℃的酸性介质中2,2'-联吡啶(bpy)催化Cr(Ⅵ) 氧化1,2-丁二醇(1,2-butanediol)的反应动力学及其机理.结果表明:反应对Cr(Ⅵ)是准一级,对1,2-丁二醇是分数级.在保持准一级反应条件 ([1,2-butanediol]0 [Cr(Ⅵ)]0 )下,该反应的表观速率常数kobs随着[H+]的增加而增大,随着[bpy]的增加而增大,并且无盐效应.据此实验现象,笔者提出了该反应的反应机理,并且由假设的反应机理推出的速率方程能很好地解释全部实验现象,为减少Cr(Ⅵ)对环境污染提供了理论依据.

关键词: 2, 2'-联吡啶, Cr(Ⅵ), 1, 2-丁二醇, 催化动力学

中图分类号:

O643.12

单金缓,王芳,霍树营,王合叶. Cr(Ⅵ)氧化1,2-丁二醇的动力学[J]. 河北大学学报(自然科学版), 2008, 28(5): 499-506.

SHAN Jin-huan,WANG Fang,HUO Shu-ying,WANG He-ye. A Kinetic Study on the Oxidation of 1,2-Butanediol by Chromium(Ⅵ)[J]. Journal of Hebei University (Natural Science Edition), 2008, 28(5): 499-506.

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