沥青基球状活性炭对几种生理分子的吸附性能  

Adsorption performance of pitch-based spherical activated carbons for several physiological molecules

作　　者：滕娜[1] 梁晓怿[1] 刘朝军[1] 刘小军[1] 张睿[1] 乔文明[1] 凌立成[1] 

机构地区：[1]华东理工大学联合化学反应工程国家重点实验室,上海200237

出　　处：《新型炭材料》2006年第4期326-330,共5页New Carbon Materials

基　　金：上海市"登山行动计划"研发基地配套专项(06DZ22003)。~~

摘　　要：考察了具有不同BET比表面积及不同孔结构的沥青基球状活性炭(PSAC)对溶液中尿毒症分子肌酐、有益分子α-淀粉酶和脂肪酶的吸附行为,测定了PSAC对肌酐的吸附等温线及吸附速度曲线,并根据Freundlich等温线方程对肌酐吸附等温线数据进行处理,检验了实验数据与方程的吻合度,确定了方程参数。结果表明PSAC对α-淀粉酶及脂肪酶吸附选择性差,对肌酐的吸附选择性好。PSAC对肌酐分子的吸附平衡容量取决于溶液浓度、孔径和比表面积;吸附速率随孔径增大而增加。PSAC对α-淀粉酶及脂肪酶的吸附选择性取决于PSAC的孔结构,孔越大吸附选择性越好。因此,评价PSAC吸附性能时需要考虑比表面积、孔结构及吸附质分子的特性。The adsorption behavior of uremically-toxic creatinine, physiologically-beneficial α-amylase and lipase from aqueous solutions into pitch-based spherical activated carbons （PSACs） with different BET surface areas and pore structures was studied by UV spectrophotometry. The adsorption isotherms and dynamic adsorption curves of creatinine were investigated. The adsorption isotherms of creatinine were fitted by the Freundlich equation, from which the parameters of the equation were determined. Results showed that PSACs had better adsorptive selectivity for creatinine than for α-amylase and lipase. The equilibrium adsorption capacity of PSACs for creatinine was influenced by the solution concentration, pore structure and BET surface area of the PSACs. The larger the mesopore volume, the higher the creatinine adsorption rate. Mesopores and macropores played an important role in the adsorptive selectivity for α-amylase and lipase. The larger the pore sizes of the PSACs, the higher the adsorptive selectivity for α-amylase and lipase.

关 键 词：沥青基球状活性炭 吸附性能 肌酐 Α-淀粉酶 脂肪酶 

分 类 号：R318.08[医药卫生—生物医学工程]