将Keggin型铁取代杂多阴离子PW11O39Fe(Ⅲ)(H2O)4-[ PW11Fe(Ⅲ)(H2O)]构成的类光-芬顿体系用于水体生物难降解有机污染物苯胺( ArNH2)的降解.研究了在紫外光照射和H2O2存在下,PW11Fe(Ⅲ)(H2O)对ArNH2降解的均相光催化作用.考察了ArNH2、H2O2和PW11Fe(Ⅲ)(H2O)浓度对光催化降解反应速率的影响.实验结果表明,0.1 mmol/L PW11Fe(Ⅲ)(H2O) +0.2 mmol/L H2O2 +0.1 mmol/L ArNH2的中性溶液在300 W汞灯照射下反应60 min,ArNH2的降解率达100％,总有机碳(TOC)去除约52％.同时讨论了PW11Fe(Ⅲ)(H2O)光催化H2O2产生羟基自由基的分子机制,并比较了酸性和中性条件下苯胺的光催化降解效果.
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