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类Fenton试剂氧化降解土壤中PAHs及其影响因素研究

Keywords: 类Fenton试剂,PAHs,土壤修复,环糊精

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Abstract:

使用类Fenton试剂可以有效降解土壤中的多环芳烃(PAHs)。选择4种PAHs菲、芘、苯并[a]芘、茚并(1,2,3-cd)芘作为考察对象,研究了类Fenton试剂对土壤中PAHs的降解条件。单因素降解实验结果表明,在H2O2浓度为0.5mol/L,Fe(NO3)3浓度为0.1mol/L,水土比为3∶1,反应时间为30min,加入HPCD环糊精浓度为0.5mol/L时为最佳降解条件。在所选用的β-环糊精、甲基β环糊精(MCD)、羟丙基β环糊精(HPCD)和乙酰基β环糊精(ACD)4种环糊精中,HPCD对提高类Fenton试剂降解土壤中PAHs的效果最好。

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