【摘要】 本文研究了在液相中 S(Ⅳ)的光参与自氧化和光参与 Fe(Ⅲ)、Mn(Ⅱ)、活性炭催化自氧化。结果表明 S(Ⅳ)的光参与自氧化是由于反应体系中以杂质形式存在的 Fe(Ⅲ)、Mn(Ⅱ)催化作用所致;发现反应对 S(Ⅳ)浓度为一级,反应速率随光强和 Fe(Ⅲ)、Mn(Ⅱ)浓度的增加而增加,Fe(Ⅲ)的光参与催化活性大于 Mn(Ⅱ),活性炭对 S(Ⅳ)的光参与自氧化没有促进作用。更多还原

【Abstract】 The photoassisted autooxidation and Fe(Ⅲ),Mn(Ⅱ),activated carbon catalyzed photooxidation of S(Ⅳ)in liquid phase were studied in this paper. The results show that the photoassisted autooxidation of S(Ⅳ)is caused by the catalystie effects of Fe(Ⅲ),Mn(Ⅱ)existing in rection system in impurity form.It was found the reaction to be first order with respect to S(Ⅳ)concen- tration.The reaction rate increases with the increase of light intensity and Fc (Ⅲ),Mn(Ⅱ)concentration.The activity of photoassisted Fe(Ⅲ)catalysis is greater than of photoassisted Mn(Ⅱ)catalysis.There is no effect of acti- vated carbon on the photoassisted autooxidation of S(Ⅳ).更多还原