732阳离子交换树脂吸附L-组氨酸的特性  

Study on the adsorption of L-histidine by 732 cation exchange resin

作　　者：邹建辉[1] 翁连进[1] 王士斌[1] 甘林火[1] 杨欣[1] 

机构地区：[1]华侨大学化工系,福建泉州362011

出　　处：《化学工程》2006年第2期1-3,共3页Chemical Engineering(China)

基　　金：国家自然科学基金资助项目(30370415);福建省科技计划重点项目(2004H013);泉州市科技计划重点项目(2004G48);泉州市科技计划重大子项目(2005ZD4_5)

摘　　要：测定25℃下732阳离子交换树脂吸附L-组氨酸的动力学曲线和吸附等温线,考察了pH值、硫酸铵浓度、L-赖氨酸和L-精氨酸对吸附的影响。结果表明,Freund lich方程可以较好地描述732阳离子交换树脂对L-组氨酸的吸附,由Freund lich方程求得其平衡吸附量为142.32 g/L;吸附率随pH值的增大而减小,适宜在小于5.4时吸附;NH4+的存在使L-组氨酸的吸附率明显下降,当NH4+浓度达到1.0 mol/L时吸附率仅为42.32%;L-赖氨酸或L-精氨酸的存在使吸附率略微减小。Adsorption kinetic curve and isotherm of L-histidine on 732 cation exchange resin were measured at 25 ℃ , and effects of pH value, temperature, （NH4）2SO4 concentration, L-lysine and L-arginine concentration on adsorption were investigated. Results show that the Freundlich model can describe the adsorption well; according to the Freundlich Equation the saturation adsorbance is 142.32 g/L; adsorption ratio decreases with the increasing of pH value, so the suitable pH value should be lower than 5.4; the existence of NH^4＋ makes adsorption ratio decrease obviously, and it decreases to 42.32% when NH^4＋ concentration reaches 1.0 tool/L; the existence of L-lysine or L-arginine makes adsorption ratio decrease slightly.

关 键 词：L-组氨酸 离子交换 吸附 

分 类 号：O647.31[理学—物理化学]