类Fenton试剂氧化降解土壤中PAHs及其影响因素研究  

Study on characteristics and influencing factors of PAHs degradation in soil by Fenton-like reagent

作　　者：杜勇超[1] 豆俊峰[1] 丁爱中[1] 范福强[1] 陈海英[1] 

机构地区：[1]北京师范大学水科学研究院,地下水污染控制与修复教育部工程研究中心,北京100875

出　　处：《环境工程学报》2011年第8期1882-1886,共5页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(51008026);北京市科技计划重大项目(D08040900360804)

摘　　要：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0.1 mol/L,水土比为3∶1,反应时间为30 min,加入HPCD环糊精浓度为0.5 mol/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。Fenton-like reagent could be effectively used for degradation of polycyclic aromatic hydrocarbons（PAHs） in soil.Phenanthrene,pyrene,benzo [a]pyrene and indeno（1,2,3-cd） pyrene were used to study the effects of different factors for the PAHs degradation by Fenton-like reagent.The results showed that the efficient degradation of PAHs in soil by Fenton-like reagent could be achieved under the condition of 0.5 mol/L H2O2 and 0.1 mol/L Fe（NO3）3 in 30 min,with a water-soil ratio of 3∶ 1 and 0.5 mol/L HPCD as catalyst.Among the four types of cyclodextrins,mainly including β-cyclodextrin（β-CD）,hydroxypropyl-β-cyclodextrin（HPCD）,methyl-β-cyclodextrin（MCD） and acetyl-β-cyclodextrin（ACD）,HPCD had the strongest stimulated effect for the oxidation of PAHs in soil by the Fenton-like reagent.

关 键 词：类FENTON试剂 PAHS 土壤修复 环糊精 

分 类 号：X53[环境科学与工程—环境工程]