【摘要】 比较了不同pH值下预处理萝卜硫素溶液对树脂吸附量的影响,测定了SP850树脂对萝卜硫素的吸附动力学曲线和不同温度下的等温吸附线。实验结果表明,在pH=3下进行预处理,能有效除去蛋白质等杂质,树脂吸附量最大;SP850树脂对萝卜硫素的吸附速率快,120min就达到吸附平衡,吸附量为77.28mg/g树脂。吸附动力学曲线符合准二级吸附动力学模型,吸附过程以液膜扩散为控制步骤;SP850树脂对萝卜硫素的等温吸附线可用Freundlich方程拟合,低温有利于吸附。以上研究结果可为萝卜硫素的分离提供理论依据。更多还原

【Abstract】 The adsorption performance of pretreatment of sulforaphane solution at different pH value were compared. The adsorption kinetics and adsorption isotherms of sulforaphane adsorbed onto SP850 resins were studied. The experiment results showed that when the sulforaphane solution was pretreated at pH 3, protein and other impurities could be effectivelyremoved and the adsorption capacity was higher. The adsorption rate of sulforaphane adsorbed onto SP850 resins was quick. Within 120min, the adsorption equilibrium could be reached and equilibrium adsorption capacity was 77.28mg/g resin. The data of adsorption kinetics of sulforaphane onto SP850 resin could be correlated with Pseudo-second-order model so that the adsorption process was mainly controlled by liquid film diffusion. The adsorption of sulforaphane onto SP850 resins at different temperature could be described by Freundlich isotherm model, and low temperature tended to favor to adsorption process These research results provided a theoretical reference for purification of sulforaphane.更多还原