沥青基球形活性炭对葡萄糖分子的吸附行为研究  

STUDY ON ADSORPTION CAPABILITY OF PITCH-BASED SPHERICAL ACTIVATED CARBON FOR ENDOGENOUS GLUCOSE

作　　者：王际童[1] 刘小军[1] 李泽斯[1] 梁晓怿[1] 乔文明[1] 凌立成[1] 

机构地区：[1]化学工程联合国家重点实验室,华东理工大学,上海200237

出　　处：《离子交换与吸附》2011年第3期247-256,共10页Ion Exchange and Adsorption

基　　金：上海市科学技术委员会支助项目(09495801200);华东理工大学优秀教师科研基金(YA0157114)

摘　　要：考察了沥青基球形活性炭(PSAC)对葡萄糖分子的吸附行为,以探讨其治疗糖尿病的可能性。在不同吸附时间、不同活性炭用量及不同浓度等条件下,测定沥青基球形活性炭对葡萄糖分子的吸附量,根据Langmuir和Freundlich等温线方程对吸附等温线数据进行拟合,检验实验数据与方程的吻合度,确定方程参数。同时,研究了葡萄糖和α-淀粉酶在沥青基球形活性炭上的竞争吸附行为。结果表明,所选用沥青基球形活性炭对葡萄糖分子的吸附在5h内达到吸附平衡;葡萄糖的初始浓度为3g/L时,平衡吸附量为71mg/g;平衡吸附量受葡萄糖分子空间构象的影响,且随葡萄糖浓度的升高而增加,吸附等温线数据与Langmuir方程吻合,说明该吸附为单分子层吸附。在葡萄糖分子和α-淀粉酶的共存环境下,沥青基球形活性炭对葡萄糖有较好的吸附选择性。Adsorption behaviors of pitch-based spherical activated carbon（PSAC） for glucose were investigated in order to study the possibility of using PSAC to cure diabetes mellitus.A systematic research was carried out to determine the optimal adsorption conditions,including adsorption-time,dosage and initial concentration.The isotherm data of glucose was modeled by the Langmuir and Freundlich isotherm equations.The competitive adsorption between glucose and α-Amylase onto PSAC was studied as well.The results showed that adsorption equilibrium capacity reached 71mg/g for 3g/L of glucose concentration after 5h of adsorption time.The maximum adsorption capacity was limited by the characteristics of adsorbate,and the adsorption equilibrium capacity increased with the increase of glucose concentration.The experimental data were best represented by the Langmuir isotherm equation.It seemed to demonstrate that the molecules were preferentially packed into micropores with monolayer adsorption.The adsorption process resulted from the micropore filling and strong surface interaction between glucose and activated carbon.PSAC had better adsorptive selectivity for glucose than for α-Amylase.

关 键 词：沥青基球形活性炭 葡萄糖 吸附 Α-淀粉酶 

分 类 号：TQ425.11[化学工程]