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研究了Fe3O4磁性纳米粒子在水溶液中对还原型谷胱甘肽(GSH)和氧化型谷胱甘肽(GSSG)的吸附。分别测定了两种物质在不同温度下的吸附等温线,比较了研究结果,并用Freundlich吸附等温式对数据进行拟合,根据公式计算出相关的吸附热力学函数值,研究了碳化二亚胺含量和pH对吸附结果的影响,并从吸附量和脱附实验结果探讨了其可能的吸附机理。结果表明,还原型谷胱甘肽和氧化型谷胱甘肽在Fe3O4表面的吸附是不可逆的,加入强电解质基本不能够脱附,两者间形成了部分共价键。
The adsorption of reduced glutathione (GSH) and oxidized glutathione (GSSG) by Fe3O4 magnetic nanoparticles in aqueous solution was studied. The adsorption isotherms of the two materials were measured at different temperatures. The results were compared. The data were fitted by Freundlich adsorption isotherms. The thermodynamic functions of the adsorbents were calculated according to the formula. The contents of carbodiimide and pH on the adsorption results, and from the adsorption capacity and desorption experimental results discussed its possible adsorption mechanism. The results showed that the adsorption of reduced glutathione and oxidized glutathione on the surface of Fe3O4 was irreversible, and the addition of strong electrolyte could not be desorbed basically, and some covalent bonds were formed between the two.