D152弱酸性离子交换树脂吸附L-组氨酸  

Adsorption of L-histidine on D152 weak acidic resin

作　　者：杨欣[1] 翁连进[1] 甘林火[1] 王士斌[2] 

机构地区：[1]华侨大学化工与制药工程系,福建泉州362021 [2]华侨大学生物工程系,福建泉州362021

出　　处：《化工科技》2005年第5期1-4,共4页Science & Technology in Chemical Industry

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)

摘　　要：测定25℃下D152弱酸性离子交换树脂吸附L-组氨酸的动力学曲线和吸附等温线,考察了溶液中pH值、硫酸铵浓度、L-赖氨酸浓度和L-精氨酸浓度等因素对吸附的影响。结果表明:D152离子交换树脂吸附L-组氨酸约30 min即可达到平衡;Langmuir方程可以较好地描述D152离子交换树脂对L-组氨酸的吸附;在实验pH值范围内,L-组氨酸的吸附率随pH值的减小而减小,当pH降至3.19时,吸附率仍达到82.38%;NH4+的存在使L-组氨酸的吸附率明显下降,当硫酸铵浓度达到1.0 mol/L时,吸附率仅为5.10%;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 D152 weak acidic resin were measured in 25℃, and the effects of pH value, （ NH4 ）2SO4 concentration, L-lysine and L-arginine concentration on adsorption were also investigated. Results show that, the equilibrium of adsorption of L-histidine on D152 weak acidic resin can be reached in 30 min; the Langmuir model can describe the adsorption well; adsorption ratio decreases with decreasing pH value at the experimental pH range,and it is still 82.38 % when the pH value decreases to 3.19; the existence of NH4^＋ makes adsorption ratio decreasing sharply, and it decreases to 5.10 % when the concentration of （NH4）2SO4 reaches 1.0mol/L; the existence of L-lysine or L-arginine makes adsorption ratio decreasing slightly.

关 键 词：L-组氨酸 离子交换 吸附 

分 类 号：TQ460.7[化学工程—制药化工]