Abstract: 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 qmPFOS>qmPFOA. 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 qePFOS>qePFOA and hPFOS>hPFOA，respectively. The equilibrium PFOS and PFOA adsorption constants，qe and 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.

Key words: ultrasound, perfluorooctane sulfonate (PFOS), perfluorooctanoate (PFOA), granular activated carbon (GAC) adsorption kinetics

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。

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