206nm紫外光降解水相中的氯化三苯基锡
PHOTODEGRADATION OF AQUEOUS TRIPHENYLTIN CHLORIDE(TPT) USING 206nm UV
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摘要: 研究了氯化三苯基锡不同初始浓度、光照时间、初始pH值和添加H2O2等因素对光降解效果的影响.结果表明,弱酸条件更有利于氯化三苯基锡的降解;当pH=2.0时,120mg·l-1氯化三苯基锡溶液光照75min后,其降解率约为89.4%;氯化三苯基锡浓度愈低,其光降解效果愈好.在氯化三苯基锡水溶液中加入双氧水后,光照75min后光降解率基本能达到100%.根据产物GC-MS分析结果,初步探讨了氯化三苯基锡光降解的机理.Abstract: The photodegradation of triphenyltin chloride(TPT)in an acidic aqueous solution was studied using a microwave electrodeless UV lamp(206nm). Different initial concentration of TPT,irradiation time,initial pH and adding hydrogen peroxide influenced the degradation ratio of TPT. A weak acidic condition was preferred for the degradation of TPT. For 120mg·l-1 TPT at pH=2.0,the degradation ratio of TPT was nearly 89.4% after irradiation for 75min.The lower of the initial concentration of TPT,the higher of the degradation ratio. When added hydrogen peroxide in the solution of TPT,the degradation ratio reached 100% nearly. Based on the analysis of photoproduct for GC-MS,disscuss the degradation mechanism of TPT.
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Key words:
- triphenyltin chloride(TPT) /
- hydrogen peroxid /
- degradation
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