AB-8 resin was used as an adsorbent for the removal of trans-1,2-cyclohexandiol(CHD) from aqueous solutions.Batch experiments were carried out to investigate the effect of contact time and temperature on sorption effi...AB-8 resin was used as an adsorbent for the removal of trans-1,2-cyclohexandiol(CHD) from aqueous solutions.Batch experiments were carried out to investigate the effect of contact time and temperature on sorption efficiency.The adsorptive thermodynamic properties and kinetics of CHD from water onto AB-8 resin were studied.The Langmuir and Freundlich isotherm models were employed to discuss the adsorption behavior.Thermodynamic parameters such as G,H and S were calculated.The results indicate that the equilibrium data are perfectly represented by Langmuir isotherm model.Thermodynamic study reveals that it is an exothermic process in nature and mainly physical adsorption enhanced by chemisorption with a decrease of entropy process.The kinetics of CHD adsorption is well described by the pseudo second-order model.The adsorbed CHD can be eluted from AB-8 resin by 5% ethanol aqueous solution with 100% elution percentage.展开更多
目的:摸索AB-8大孔吸附树脂分离纯化人参保健酒中人参皂苷的工艺条件及参数。方法:以人参皂苷Rg1、Re、Rb1的含量为指标,考察大孔树脂在不同工艺条件下对人参单体皂苷的分离纯化能力。结果:AB-8大孔吸附树脂对皂苷具有较好的纯化富集性...目的:摸索AB-8大孔吸附树脂分离纯化人参保健酒中人参皂苷的工艺条件及参数。方法:以人参皂苷Rg1、Re、Rb1的含量为指标,考察大孔树脂在不同工艺条件下对人参单体皂苷的分离纯化能力。结果:AB-8大孔吸附树脂对皂苷具有较好的纯化富集性能。其最佳工艺条件为2.0 g树脂最大吸附1.0 g生药量,分别用10.0 m L纯化水、20.0 m L 0.05 mo L·L-1氢氧化钠、30%甲醇除杂,90%甲醇洗脱,洗脱剂用量为20.0 m L,洗脱流速为0.6 m L·min-1。结论:该工艺简单易行,适用于高效液相测人参保健酒中单体皂苷含量。展开更多
文摘AB-8 resin was used as an adsorbent for the removal of trans-1,2-cyclohexandiol(CHD) from aqueous solutions.Batch experiments were carried out to investigate the effect of contact time and temperature on sorption efficiency.The adsorptive thermodynamic properties and kinetics of CHD from water onto AB-8 resin were studied.The Langmuir and Freundlich isotherm models were employed to discuss the adsorption behavior.Thermodynamic parameters such as G,H and S were calculated.The results indicate that the equilibrium data are perfectly represented by Langmuir isotherm model.Thermodynamic study reveals that it is an exothermic process in nature and mainly physical adsorption enhanced by chemisorption with a decrease of entropy process.The kinetics of CHD adsorption is well described by the pseudo second-order model.The adsorbed CHD can be eluted from AB-8 resin by 5% ethanol aqueous solution with 100% elution percentage.
文摘采用AB-8大孔树脂吸附分离橄榄油加工废液中的橄榄多酚。分别考察了静态吸附、静态解吸和动态洗脱工艺条件。结果表明:适宜的静态吸附条件为在30℃下用1.5 g预处理的树脂吸附20 m L橄榄多酚质量浓度为1.52 mg/m L的粗提稀释液,吸附3 h时吸附量可达14.43 mg/g;动态洗脱橄榄多酚的适宜条件为洗脱流速1.0 m L/min,依次用蒸馏水、70%乙醇溶液、90%乙醇溶液进行分段洗脱。在静态吸附和动态分段洗脱的组合条件下,纯化所得橄榄多酚的纯度为56.44%,为粗提稀释液的7.93倍。
文摘目的:摸索AB-8大孔吸附树脂分离纯化人参保健酒中人参皂苷的工艺条件及参数。方法:以人参皂苷Rg1、Re、Rb1的含量为指标,考察大孔树脂在不同工艺条件下对人参单体皂苷的分离纯化能力。结果:AB-8大孔吸附树脂对皂苷具有较好的纯化富集性能。其最佳工艺条件为2.0 g树脂最大吸附1.0 g生药量,分别用10.0 m L纯化水、20.0 m L 0.05 mo L·L-1氢氧化钠、30%甲醇除杂,90%甲醇洗脱,洗脱剂用量为20.0 m L,洗脱流速为0.6 m L·min-1。结论:该工艺简单易行,适用于高效液相测人参保健酒中单体皂苷含量。