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从6种大孔树脂中筛选出用于茄尼醇分离较好的树脂NKA,并进一步研究了其对茄尼醇吸附行为,结果表明,吸附等温线服从Langmuir方程和Freundlich方程,且吸附过程表现为优惠吸附。在温度为283～313K,吸附量为15～35mg/g的条件下,吸附焓变为-16.20～-16.57kJ/mol,自由能变为-3.142～-3.459kJ/mol,吸附熵变为-47.43～-41.17J/mol·K。NKA树脂对茄尼醇吸附速率较快,吸附过程符合一级吸附动力学方程,吸附过程主要受液膜扩散控制。
Abstract：Six different kinds of macroporous adsorption resins named D4020,NKA,AB-8,D101,NKA9 and S-8 were studied on the static adsorption capacity and desorption rate of solanesol,the better resin was NKA,and the adsorption capacities of solanesol were 45.2mg/g at the initial concentration of 3.9993mg/mL. The adsorption behavior of solanesol on NKA resin was further investigated by the static method. The results showed that the sorption behavior of NKA for solanesol obeys the Freundlich and Langmuir adsorption isotherm and fit in better with Langmuir equation,the adsorption behave benefitful adsorption. Thermodynamic calculation and analysis showed that when the adsorption of solanesol were 15～35mg/g in 283～313K,adsorption enthalpy change ΔH were -16.20～-16.57kJ/mol,free energys ΔG -3.142～-3.459kJ/mol,entropys of adsorption ΔS -47.43～-41.17J/mol·K. The speeds of adsorption appear to follow the first order kinetics,and the adsorption processes were mainly affected by film diffusion.
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基本信息:
中图分类号:O647.31
引用信息:
[1]鄢贵龙,纪丽莲.大孔树脂对茄尼醇吸附行为的研究[J].离子交换与吸附,2009,25(04):346-353.
基金信息:
江苏省普通高校自然科学研究计划(05KJD530040);; 淮阴师范学院青年优秀人才支持项目(06QNZC031)
2009-08-20
2009-08-20