Kinetic and thermodynamic studies of sulforaphane adsorption on macroporous resin

• Published in: Journal of chromatography. B, Analytical technologies in the biomedical and life sciences Vol. 1028; pp. 231 - 236
• Main Authors: Yuanfeng, Wu, Lei, Zhang, Jianwei, Mao, Shiwang, Liu, Jun, Huang, Yuru, You, Lehe, Mei
• Format: Journal Article
• Language: English
• Published: Netherlands Elsevier B.V 15.08.2016
• Subjects: Adsorption; Anticarcinogenic Agents - chemistry; Anticarcinogenic Agents - isolation & purification; Brassica - chemistry; Chromatography, High Pressure Liquid - methods; Diffusion; Isotherm; Isothiocyanates - chemistry; Isothiocyanates - isolation & purification; Kinetic; Kinetics; Macroporous resin; Porosity; Resins, Synthetic - chemistry; Sulforaphane; Thermodynamic; Thermodynamics; Isotherm; Adsorption; Kinetic; Sulforaphane; Macroporous resin; Thermodynamic
• ISSN: 1570-0232; 1873-376X
• DOI: 10.1016/j.jchromb.2016.06.035

•SP850 resin was selected as the most suitable resin for sulforaphane purification.•The Redlich-Peterson equation could describe the adsorption behavior.•The adsorption of sulforaphane was a physical, exothermic and spontaneous process.•Sulforaphane diffused quickly in the macropore at the beginning of the adsorption process. The adsorption equilibrium, kinetic and thermodynamic of sulforaphane (SF) adsorption onto macroporous resin in aqueous phase were studied. The SP850 resin was screened as the appropriate resin for SF purification. From the equilibrium studies, the Redlich-Peterson model was found to be the best for description of the adsorption behavior of SF onto SP850 resin, followed by the Freundlich model and the Langmuir model. Batch equilibrium experiments demonstrated that, in the examined temperature range, the equilibrium adsorption capacity of SP850 resin decreased with increasing adsorption temperature. Thermodynamics studies indicated that the adsorption of SF was a physical, exothermic, and spontaneous process. The adsorption kinetics revealed that the pseudo-second-order kinetic model was suitable to characterize the kinetics of adsorption of SF onto SP850. Finally, the intra-particle diffusion model demonstrated that SF diffused quickly into macropores, and that diffusion slowed down in the meso- and micropores.