Abstract: The effects of temperature，pH value，the concentrations of NH4Cl and NaCl on the adsorption of L-threonine on macroporous strong-acid cation exchange resin were investigated, and its adsorption isotherm at 25 ℃ was measured. The results showed that the adsorbance decreased slightly with rising temperature, and with increasing of pH, but decreased sharply with increasing NaCl and NH4Cl concentrations in aqueous solution. The maximum adsorbance at 25 ℃ was 70 g·kg－1 resin.

摘要： 实验考察了温度、pH值、氯化铵和氯化钠浓度对D001型阳离子交换树脂吸附L-苏氨酸的影响，并测定了25 ℃时阳离子交换树脂吸附L-苏氨酸的吸附等温线。结果表明：阳离子交换树脂吸附L-苏氨酸的吸附率随温度的升高呈略下降的趋势，是个放热过程；pH值增大，吸附率下降；溶液中氯化铵或氯化钠浓度增大，吸附率迅速下降，且当氯化铵或氯化钠物质的量浓度达到1.0 mol·L－1时，L-苏氨酸在树脂上吸附量很小；25 ℃时，最大饱和吸附量约为70g·kg－1(树脂)。