【摘要】 研究了溶液中4-氯酚(4CP)、2-氯酚(2CP)、4-氯-3-甲基酚(4C3MP)、2,4-二氯酚(2,4-DCP)、2,4,6-三氯酚(2,4,6-TCP)和五氯酚(PCP)的微波辅助光催化降解(MW/PCO)。结果表明,6种氯酚(CPs)光降解速率与分子中Cl原子取代的数目、位置等分子结构性质有关,单氯酚比多取代氯酚易光解。MW/PCO降解4CP的主要中间产物为苯酚、氯苯、对苯醌、对苯二酚等,降解PCP的主要中间产物为2,3,5,6-四氯对苯醌、2,3,4,6-四氯对苯二酚、四氯酚。CPs降解的机制是紫外光降解和羟基自由基(.OH)亲电子加成脱氯过程。更多还原

【Abstract】 The chemical decomposition of six selected chemicals of CPs,namely 2CP,4CP,4C3MP,2,4-DCP,2,4,6-TCP,PCP,were tested using microwave-assisted UV electrodeless discharge lamp photocatalytic degradation system.It is found that the decomposition is faster for monohalogenated phenols than poly-substituted phenols.Intermediates such as phenol,chlorobenzene,hydroquinone and benzoquinone may be generated for 4CP,involving both radical reactions and direct photolysis.The corresponding intermediates were to determined to be TTCP,tetrachloro-hydroquinone and tetrachloro——benzoquinone for PCP.更多还原