超声波强化GAC吸附水中PFBA和PFBS的研究  

Sono-assisted sorption of perfluorobutane sulfonate and perfluorobutyric acid in aqueous solution by granular activated carbon

作　　者：赵德明[1] 王振[1] 吴纯鑫[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]W. M. Keck Laboratories,California Institute of Technology,California Pasadena 91125,USA

出　　处：《浙江工业大学学报》2013年第2期186-190,共5页Journal of Zhejiang University of Technology

基　　金：浙江省自然科学基金资助项目(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20kHz超声波强化活性炭颗粒(GAC)吸附不同种类水溶液中全氟丁烷磺酸(PFBS)和全氟丁酸(PFBA),结果表明:平衡吸附符合BET多层等温吸附,最大单层吸附容量为qPmFBS>qPmFBA;在PFBS和PFBA初始质量浓度为50mg/L时超声波辐照下GAC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qePFBS>qePFBA和hPFBS>hPFBA;20kHz超声波强化活性炭颗粒吸附PFBS和PFBA效果明显,其吸附动力学常数增强因子为3.8～5.5和1.7～1.8;在去离子水(MQ)中的PFBS和PFBA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液(Pre-GW和GW)中对PFBS和PFBA的平衡吸附量和吸附动力学常数.The sorption of perfluorobutane sulfonate （PFBS） and perfluorobutyric acid （PFBA） from deionized water （MQ） and landfill groundwater （GW） by granular activated carbon （GAC） in the absence and presence of 20 kHz ultrasound were studied. The equilibrium adsorption isotherms were well described by the BET multilayer absorption isotherm and maximum monolayer sorption capacity was qm/PFBS〉qm/PFBS. In all cases, the adsorption kinetics were found to be well-represented by a pseudo-second-order model, with equilibrium sorption capacity and initial sorption rate values following the orders qe/PFBS〉qe/PFBSBAand hPFBS〉hPFBS respectively. Ultrasonic irradiation significantly increased the PFBS/PFBA-GAC sorption kinetics, by a factor of 3.8~5.5 and 1.7～1.8. The equilibrium PFBS and PFBA sorption constants, qe and qm, and the sorption kinetic constants, h and K, were greater in Milli-Q water （MQ）than landfill groundwater （GW） with or without pretreatment.

关 键 词：超声波 全氟丁烷磺酸(PFBS) 全氟丁酸(PFBA) GAC 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]