钴(II)诱导过一硫酸盐产氧的研究

M. Najafpour, W. Hillier, M. Lashgari, Davoud Matloubi
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引用次数: 0

摘要

研究了Co(II)与Oxone (2khso5·khso4·k2so4)在pH = 4.5条件下的产氧反应。在Co(II)和Oxone存在的情况下,产氧是一级反应,但整个反应是二级反应。结果表明,Co(III)和硫酸盐自由基是产氧反应的主要中间体。在5种不同温度下对该反应进行了研究,确定了动力学参数和活化参数,并提出了产氧机理。为了确定水在多大程度上是演化氧的来源,进行了h218o同位素标记实验,并结合了膜入口质谱(MIMS)
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Oxygen Production of Peroxomonosulphate Induced by Cobalt(II)
The oxygen production reaction between Co(II) and Oxone (2KHSO 5 ·KHSO 4 ·K 2 SO 4 ) at pH = 4.5 was studied. Oxygen production was seen to be a first order reaction in the presence of Co(II) and Oxone but the overall reaction order is second order. T he analysis of the result revealed Co(III) and sulphate radical as proposal intermediates in oxygen production reaction. The reaction was studied at five different temperatures and kinetic and activation parameters were determined and a mechanism for oxygen production was proposed. To determine to what extent water was the source of the evolved oxygen, H 2 18 O isotope-labelling experiments coupled with membrane inlet mass spectrometry (MIMS) were carried out
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