胱氨酸修饰啤酒废酵母对Hg（Ⅱ）的吸附性能

胱氨酸修饰啤酒废酵母对Hg（Ⅱ）的吸附性能 Adsorption Behavior for Hg（Ⅱ） of Waste Beer Yeast Modified by Cystine 黄冰 HUANG Bing 1 first-author 孙小梅 SUN Xiaomei 1 雷超 LEI Chao 1 李步海 LI Buhai 1 中南民族大学化学与材料科学学院/分析化学国家民委重点实验室 中南民族大学化学与材料科学学院/分析化学国家民委重点实验室 College of Chemistry and Materials Science,South-Central University for Nationalities/ Key Laboratory of Analytical Chemistry of the State Ethnic Affairs Commission College of Chemistry and Materials Science,South-Central University for Nationalities/ Key Laboratory of Analytical Chemistry of the State Ethnic Affairs Commission 以戊二醛作交联剂,将胱氨酸接枝到啤酒废酵母上,合成了一种新型的生物吸附剂.通过X射线光电子能谱（XPS）、电子显微镜和红外光谱（IR）表征了该吸附剂的结构,考察了其吸附Hg（Ⅱ）的影响因素即溶液的pH值、金属离子的初始浓度、吸附时间等.结果表明,修饰啤酒废酵母吸附Hg（Ⅱ）的最佳条件是:在20℃吸附溶液的pH值为0.83 3 .29,吸附50 min.吸附过程符合准二级方程,吸附为Langmuir单分子层化学吸附,修饰前后啤酒废酵母的最大吸附容量分别为21.2,42.7 mg.g-1,用于处理加标南湖水样,去除率达96.6%,相对标准偏差为0.39%. The sorbents were prepared from waste beer yeast through modification of cystine with glutaradehyde.X-ray photoelectron spectroscopy,microscope and FT-IR were used to characterize the modified waste beer yeast,and the factors impacting the adsorption of modified waste beer yeast on Hg（Ⅱ） were investigated including pH value,the initial concentration of metal and adsorption time.The optimal adsorption conditions of modified waste beer yeast of Hg（Ⅱ）were as follows: the pH of the solution was between 0.83 to 3.29;the absorption time was 50 min;and the temperature was 20 ℃.The adsorption process followed the pseudo second-order kinetics.The adsorption behavior belonged to Langmuir monolayer adsorption of chemical adsorption.The maximum adsorption capacities of waste beer yeast before and after modification were 21.2,42.7 mg·g-1,respectively.South Lake water samples containing Hg（Ⅱ）were treated by modified biomass,and the removal rate for Hg（Ⅱ）was 96.6%,while RSD was 0.39%. 啤酒废酵母 胱氨酸 吸附 修饰 Hg（Ⅱ） waste beer yeast cystine adsorption modification Hg（Ⅱ） 10.14188/j.1671-8836.2010.03.014 X70 国家民族事务委员会院校科研基金（MJY00004）资助项目 2010-03-01 2021-04-01 3 56