【摘要】 制备了MIL-53(Al)、DUT-4和DUT-53种材料,并将其作为吸附剂对水中全氟辛烷磺酸基化合物(PFOS)进行吸附去除。结果表明,金属核心粒子与MOFs骨架结构相同的情况下,有机配体分子长度越长,材料对PFOS的吸附量越大。Langmuir模型能较好的拟合3种材料吸附PFOS的吸附等温线数据,MIL-53(Al)、DUT-4和DUT-5对PFOS的最大理论吸附量分别为68.05、176.5、326.9 mg/g。3种材料对PFOS的吸附动力学符合准2级动力学模型,吸附平衡时间均在100 min左右。随溶液p H的增加,吸附量有所减少。更多还原

【Abstract】 MIL-53(Al), DUT-4 and DUT-5 were synthesized as absorbents to remove PFOS from aqueous solution. The result showed that the adsorption capacity of PFOS increased with the increase of the length of organic ligand in the case of the same structure of the metal core particle and the MOFs framework. Langmuir model was well fitted with the adsorption isotherm data of PFOS on three kinds of materials. The maximum theoretical adsorption of MIL-53(Al), DUT-4 and DUT-5 were 68.05 mg/g, 176.5 mg/g and 326.9 mg/g respectively. The adsorption kinetics of PFOS on three materials conformed to the Second-order kinetics model, and the time of reaching adsorption equilibrium was about 100 min. The adsorption capacity decreased with the increase of p H.更多还原