玉米芯粉对中性红的吸附脱色研究  

Study on the Adsorptive Property of Corncob Powder for Neutral Red

作　　者：王俊敏[1] 冯涛[1] 胡焱弟[2] 唐然肖[1] Wang Junmin Feng Tao Hu Yandi Tang Ranxiao(College of Science, Agricultural University of Hebei, Baoding 071001 Department of Civil ＆ Environmental Engineering, University of Houston, Houston 77204, USA)

机构地区：[1]河北农业大学理学院,保定071001 [2]休斯顿大学土木与环境工程学院,美国休斯顿77204

出　　处：《化学通报》2016年第10期981-985,共5页Chemistry

基　　金：2015年度河北农业大学理工基金项目(LG20150402);河北省大学生创新训练项目;河北农业大学中青年骨干教师境外研修项目资助

摘　　要：本文研究了玉米芯粉对染料的吸附脱色情况,结果表明,玉米芯粉能有效吸附阳离子染料。以阳离子染料中性红为模型,考察了吸附剂用量、溶液浓度、溶液p H以及温度等对吸附平衡的影响,结果表明玉米芯粉吸附中性红符合拟二级动力学方程;不同温度下,该吸附过程符合Langmuir方程和Freundlich方程,qmax、KF受温度影响小;D-R等温方程拟合结果表明该吸附是以化学吸附为主;热力学参数计算结果表明玉米芯粉吸附中性红是一个熵减的自发放热过程。其他电解质的存在不利于吸附反应的进行。The adsorption property of corncob powder for different dyes was studied, and the results showed that the cationic dyes can be effectively adsorbed on the corncob powder. The effects of adsorbent dosage, pH, concentration and temperature of the solution on the adsorption of neutral red were investigated. The resultant kinetic data were well fitted by the pseudo-second-order kinetics model. At different temperatures, the adsorption process was in accordance with both the Langmiur isotherm mode and the Freundlich isotherm mode, the value of q,,,ax and K_F. were little influenced by the temperature. The result of Dubinin-Radushkevich isotherm fitting showed that the adsorption is mainly a chemical adsorption. The thermodynamics study indicated that the adsorption of neutral red on the corncob powder was spontaneous and exothermic. The existence of other electrolyte was not conducive to the adsorption.

关 键 词：玉米芯粉 吸附 阳离子染料 中性红 热力学 

分 类 号：X791[环境科学与工程—环境工程] O647.3[理学—物理化学]