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Citation: FU Yong, WU Guo-Guang, PENG Qi-Jun. Adsorption Separation of Threonine and Glumatic Acid on D318 Resin and Thermodyamics[J]. Chinese Journal of Applied Chemistry, ;2007, 24(4): 452-456. shu

Adsorption Separation of Threonine and Glumatic Acid on D318 Resin and Thermodyamics

1.
School of Chemical and Material Engineering, Southern Yangtze University, Wuxi 214036

Corresponding author: PENG Qi-Jun,
Received Date: 5 May 2006
Available Online: 28 October 2006

The adsorption and thermodynamic behavior of threonine and glutamic acid in aqueous solution on D318 resin selected from eight different structural anion exchange resins were investigated by the static method.Two models of Langmuir and Freundlich were used to simulate the equilibrium adsorption isotherm curves of threonine and glutamic acid.The results show that the adsorption isotherm curves of threonine and glutamic acid on D318 resin fit in better with Langmuir adsorption isotherm equation and the adsorption of them on D318 resin behave benefitful adsorption.The study of thermodynamics show that when the adsorption of threonine are 8~10 mg/g in 293~313 K,adsorption enthalpy change ΔH are 30.026~31.615 kJ/mol,free energys ΔG-14.337~-26.340 kJ/mol,entropys of adsorption ΔS-48.616~-16.855 J/(mol·K);and when the adsorption of glutamic acid are 30~50 mg/g in 293~313 K,adsorption enthalpy ΔH are-58.036~-60.053 kJ/mol,free energys ΔG-85.017~-137.647 kJ/mol,entropys of adsorption ΔS 92.084~247.905 J/(mol·K).
- anion exchange resin,
- threonine,
- glutamic acid,
- adsorption separation,
- thermodynamic property
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