超声波强化活性炭颗粒吸附PFOA和PFOS  

Ultrasound-enhanced adsorptive removal of PFOS and PFOA by granular activated carbon

作　　者：赵德明[1] 张德兴[1] Hoffmann Michael R 

机构地区：[1]浙江工业大学化学工程与材料学院,浙江杭州310032 [2]加州理工学院凯克实验室

出　　处：《化工进展》2012年第9期2097-2101,共5页Chemical Industry and Engineering Progress

基　　金：中国博士后科学基金(20100471716);浙江省自然科学基金(Y5100075);浙江省科技厅公益技术研究社会发展项目(2012C23044)

摘　　要：研究了20 kHz超声波强化活性炭颗粒吸附不同种类水溶液中全氟辛烷磺酸(PFOS)和全氟辛酸(PFOA)的动力学。结果表明:平衡吸附被证实符合BET多层等温吸附,最大单层吸附容量为qmPFOS>qmPFOA;在PFOS和PFOA初始浓度为50 mg/L时超声波辐照下活性炭颗粒吸附符合表观拟二级动力学关系,平衡吸附容量和起始吸附速率分别为qePFOS>qePFOA和hPFOS>hPFOA;在去离子水(MQ)中的PFOS和PFOA最大单层吸附平衡容量qm和平衡吸附容量qe及起始吸附速率h和吸附动力学常数K均大于预处理或未预处理后的垃圾渗滤地表水(Pre-GW和GW)中对PFOS和PFOA的平衡吸附量和吸附动力学常数;20 kHz超声波强化活性炭颗粒吸附PFOS和PFOA效果明显,其吸附动力学常数增强因子为7.7和4.4。The adsorption of perfluorooctane sulfonate（PFOS） and perfluorooctanoate（PFOA） from Milli-Q water（MQ） and landfill groundwater（GW） by granular activated carbon（GAC） in the absence and presence of 20 kHz ultrasound was investigated.The equilibrium adsorption isotherms were well described by the BET multilayer absorption isotherm and maximum monolayer sorption capacity was qmPFOSqmPFOA.In all cases,the adsorption kinetics were well represented by a pseudo-second-order model,with equilibrium sorption capacity and initial sorption rate values following the order qePFOSqePFOAand hPFOShPFOA,respectively.The equilibrium PFOS and PFOA adsorption constants,qeand qm,and the adsorption kinetic constants,h and K,were greater in Milli-Q water（MQ） than landfill groundwater（GW） with or without pretreatment,indicating competition for adsorption sites by groundwater organics.Ultrasonic irradiation significantly increased the PFOS/PFOA-GAC adsorption kinetics,by an enhanced factor of 7.7 and 4.4 respectively.

关 键 词：超声波 全氟辛烷磺酸 全氟辛酸 活性炭颗粒吸附 动力学 

分 类 号：X78[环境科学与工程—环境工程] TQ209[化学工程—有机化工]