壳聚糖-硅胶复合物对中性红的吸附研究  

Adsorption of Neutral Red by Chitosan-silica Composite

作　　者：刘小花[1] 白海鑫[1] 牛曼蓉 刘也可 LIU Xiaohua;BAI Haixin;NIU Manrong;LIU Yeke(College of Sciences,Henan Agricultural University,Zhengzhou 450002,China)

机构地区：[1]河南农业大学理学院,郑州450002

出　　处：《河南科学》2018年第12期1915-1919,共5页Henan Science

基　　金：国家自然科学青年基金(31501213);河南省高等学校青年骨干教师资助计划项目(2014GGJS-083)

摘　　要：以壳聚糖-硅胶复合物作为吸附剂,研究了其对水溶液中染料中性红的吸附性能.探讨了吸附剂用量、pH值、吸附时间、染料浓度、吸附温度等因素对该吸附过程的影响.分析了壳聚糖-硅胶复合物对中性红的吸附动力学和吸附等温线.结果表明,该吸附过程动力学符合准二级动力学模型;Langmuir和Freundlich模型均可用来描述该吸附等温线,且该吸附是个放热过程. 298 K时,壳聚糖-硅胶复合物对中性红的最大吸附量为132.46 mg?g^(-1).The adsorption of netural red in aqueous solution by chitosan-silica composite was explored.The influence of the adsorbent mass,pH value,adsorption time,dye concentration and temperature on adsorption were investigated.The adsorption kinetics and adsorption isotherms were analyzed.The results indicated that the adsorption process was in accordance with the second-order kinetic model.Langmuir and Freundlich model could be used to describe adsorption isotherms and the adsorption was an exothermic process.The maximum adsorption capacity was 132.46 mg·g-1 at 298 K.

关 键 词：壳聚糖-硅胶复合物 中性红 吸附动力学 吸附等温线 

分 类 号：O647.31[理学—物理化学]