摘要
采用竞争吸附法分离异戊酰螺旋霉素Ⅱ和Ⅲ。分别采用扩展Langmuir、扩展Langmuir-Freundlich和扩展Jovanovic-Freundlich模型拟合了稀溶液中异戊酰螺旋霉素Ⅱ和Ⅲ在HZ820上的竞争吸附热力学行为。其中扩展Jovanovic-Langmuir模型取得了最好的结果。并研究了温度和pH值对HZ820吸附异戊酰螺旋霉素Ⅱ和Ⅲ的吸附量和选择性的影响,实验表明:提高温度利于异戊酰螺旋霉素Ⅱ和Ⅲ在HZ820上吸附量的增大和选择性的提高,而提高pH值利于增大异戊酰螺旋霉素Ⅱ和Ⅲ在HZ820上的吸附量,而选择性则在pH值接近6.5时趋于最大值。
The equilibrium adsorption experiments were carried out to investigate the effects of pH and temperature on the competitive adsorption of 4＂-O-isovalerylspiramycin Ⅱ and Ⅲ in aqueous solutions onto the macroporous resin HZ820. The binary competitive adsorption behavior of 4＂-O-isovalerylspiramycin Ⅱ and Ⅲ was described by means of the extended Langmuir, Langmuir-Freundlich and Jovanovic-Freundlich models, among which the extended Langmuir-Freundlich adsorption model gave the best competitive isotherm fits for both 4＂-0- isovalerylspiramycin Ⅱ and Ⅲ. The selectivities and adsorption capacities of HZ820 for 4＂-O-isovalerylspiramycin Ⅱ and IU were also studied. The result shows that the adsorption capacities of 4＂-O-isovalerylspiramycin II and m increase with increasing pH and temperature, respectively. The selectivity increases with temperature rise, and reaches a maximum value as pH is increased to 6.5.
出处
《化学工程》
CAS
CSCD
北大核心
2012年第9期1-5,共5页
Chemical Engineering(China)
基金
上海市科学委员会资助项目(10431901500)
