从8种不同结构的阴离子交换树脂中筛选出D318树脂对水溶液中苏氨酸和谷氨酸的静态吸附分离及其热力学性质进行了研究.结果表明,langmuir模型对实验数据的拟合度优于Freundlich模型,且苏氨酸和谷氨酸在树脂吸附过程中都表现为优惠吸附.热力学研究结果表明,在293～313 K条件下,苏氨酸吸附量为8～10 mg/g的吸附焓变为30.026～31.615 kJ/mol,自由能变为-14.337～-26.340 kJ/mol、吸附熵变为-448.616～-16.855 J/(mol·K);而谷氨酸吸附量为30～50 mg/g的吸附焓变为-58.036～-60.053 kJ/mol,自由能变为-85.017～-137.647 kJ/mol、吸附熵变为92.084～247.905 J/(mol·K).
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