【摘要】 采用固载化的方法,以环氧氯丙烷做为连接剂,在碱性介质中将β-环糊精接枝到木质素上,制备了木质素基β-环糊精醚(简称L-β-CD)新型吸附剂。采用红外光谱对其结构进行定性分析,通过单因素实验,考察了β-环糊精用量、氢氧化钠用量、反应温度和反应时间对β-环糊精含量的影响,研究了L-β-CD对Cu2+的吸附性能。结果表明,L-β-CD的较佳合成条件为:β-环糊精与木质素的质量比为3∶1,氢氧化钠(质量分数16.7%)用量25 mL/g木质素,反应温度55℃,反应时间3 h,此时木质素基β-环糊精醚中β-环糊精的含量最大,为30.88μmol/g。20℃时,L-β-CD对Cu2+吸附容量为16.54 mg/g。更多还原

【Abstract】 A new kind of adsorption agent lignin grafted β-cyclodextrin(L-β-CD)coataining epichlorohydrin was synthesized in the alkaline solution from the wheat straw alkali lignin.The structure of lignin grafted β-cyclodextrin was analyzed by FT-IR.The influences of the dosage of β-cyclodextrin,reaction temperature,reaction time and the dosage of sodium hydroxide on the β-cyclodextrin content were investigated.The results showed that the optimal synthesis condition was that the ratio of β-cyclodextrin to lignin was 3 to 1 by weight,the reaction temperation was 55℃,the reaction time was 3 hours and the dosage of sodium hydroxide was 25 mL(16.7% by weight) per gram of lignin,the β-cyclodextrin content reached the maximum 30.88 μmol/g under this condition.The Cu2+ adsorption performance of the lignin grafted β-cyclodextrin was studied in the model of polluted water.The results showed that the saturated quantity of Cu2+ reached 16.54mg/g.更多还原