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Fe(Ⅲ)-酒石酸盐配合物体系的光解特性

Keywords: 氢氧自由基,Fe(Ⅱ),Fe(Ⅲ),酒石酸盐,光化学

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Abstract:

以Fe(Ⅲ)-酒石酸配合物体系光化学过程中产生的Fe(Ⅱ)和·OH为主要检测对象,探讨了Fe(Ⅲ)-酒石酸配合物体系光化学反应的基本规律及影响因素。结果表明,体系的光化学过程能产生Fe(Ⅱ)和·OH;产生Fe(Ⅱ)的速率远高于产生·OH的速率;Fe(Ⅱ)生成浓度在pH3.50时最大,·OH则在pH3.00时最大;配合物的光化学过程中会伴随pH的升高;在照度为3.6×103Lux的日光灯照射下,Fe(Ⅲ)-酒石酸盐配合物初级光解的速率常数为2.1×10-3S-1;Fe(Ⅱ)是高价重金属的主要还原剂,·OH是有机物的主要氧化剂。

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