摘要
以市售非极性大孔吸附树脂LX-60为基础,通过在其中引入氯甲基、磺酸基和羧基,其功能化反应程度分别达到2.43 mmol/L、0.20 mmol/L和0.15 mmol/L。对比得到的功能化树脂以及市售大孔树脂吸附性能,发现不同功能基的引入对LX-60的吸附/解吸性能产生了较大影响;LX-60在羧酸化反应后具有了更为优异的吸附性能(吸附量提高了33.6%,达到91.70 mg/g),而解吸量却相对降低(解吸附量降低83.6%,达到10.03 mg/g)。对LX60-COO-的吸附动力学研究发现,LX60-COO-在吸附360 min后基本达到吸附平衡,吸附动力学曲线更为符合准二级动力学模型(R^2=0.986 4);热力学考察结果表明,当原液质量浓度达到1.8 g/L后,LX60-COO-的吸附量不再随原液质量浓度的增加而显著提高。
Base on the commercially available nonpolar macroporous adsorption resin （MAR） LX-60, by the introductions of chloromethyl group, sulfonic acid group and carboxyle group, the functionalization reaction degree of MAR reached 2.43 mmol/L, 0.20 mmol/L and 0.15 mmol/L, respectively. Comparing the adsorption and functional performance of the functional MAR with commercial MAR, the introduction by different functional group had a significant effect on adsorption/desorption of LX-60. The LX-60 had a better adsorption capability by introduced carboxylic acid reaction （the adsorption capacity reached 91.70 mg/g, which increased 33.6%）, while desorption was reduced comparatively （the desorption capacity reached 10.03 mg/g, which decreased 83.6%）. Kinetic study of LX60-COO- showed that it reached adsorption equilibrium after 360 min, and the pseudo-second-order model （R2= 0.986 4） was more suitable to express the adsorption kinetics than pseudo-first-order model （R2= 0.869 0）. The adsorption isotherm found that the adsorption of LX60-COO- did not significantly increase with the increase of solution concentration when solution concentration reached 1.8 g/L.
出处
《中国酿造》
CAS
北大核心
2016年第9期113-118,共6页
China Brewing
基金
宁夏自然科学基金项目(NZ14256)
关键词
大孔吸附树脂
功能化反应
吸附性能
甘草酸
macroporous adsorption resin
functionalized reaction
adsorption properties
glycyrrhizic acid
