氧化叔胺树脂制备及对水中刚果红的吸附性能研究  

Synthesis of tertiary amine oxide resins and its adsorption properties for Congo red in solutions

作　　者：韩金宏 张丹丹 刘敏 刘绍刚[1,2] 董慧峪 谭学才[1] 蒋才芳[1,3] 刁开盛 Han Jinhong;Zhang Dandan;Liu Min;Liu Shaogang;Dong Huiyu;Tan Xuecai;Jiang Caifang;Diao Kaisheng(Key Laboratory of Chemistry and Engineering of Forest Products,State Ethnic Affairs Commission,Guangxi Key Laboratory of Chemistry and Engineering of Forest Products,Guangxi Collaborative Innovation Center for Chemistry and Engineering of Forest Products,School of Chemistry and Chemical Engineering,Guangxi University for Nationalities,Nanning 530008;Key Laboratory of Drinking Water Science and Technology,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085;Guangxi Nanning Water Co.,Ltd.,Nanning 530031)

机构地区：[1]广西民族大学化学化工学院,林产化学与工程国家民委重点实验室,广西林产化学与工程重点实验室,广西林产化学与工程协同创新中心,南宁530008 [2]中国科学院生态环境研究中心,中国科学院饮用水科学与技术重点实验室,北京100085 [3]广西绿城水务股份有限公司,南宁530031

出　　处：《化工新型材料》2024年第5期221-228,233,共9页New Chemical Materials

基　　金：国家自然科学基金(21976040、21667005、22166007和22166008);广西高等学校高水平创新团队及卓越学者资助计划项目(桂教人[2020]6号);广西科技重大专项(桂科AA18118013)。

摘　　要：以丙烯酸二甲氨基乙酯为单体、三羟甲基丙烷三甲基丙烯酸酯为交联剂,通过悬浮聚合法制备出叔胺树脂(TAR),然后经H_(2)O_(2)改性得到氧化叔胺型树脂(TAOR)。采用场发射扫描电镜(SEM)、傅里叶变换红外光谱(FT-IR)、氮气吸附-脱附曲线和热重(TG)等技术手段对其结构进行了表征。以刚果红(CR)为模型对象污染物,并通过正交试验对TAOR最佳合成工艺进行了优化研究,同时,研究了TAOR投加量、溶液pH、离子强度和共存组分等因素对水中CR吸附性能的影响,并对其吸附过程中吸附动力学模拟。结果表明:CR的吸附量随着pH和离子强度的增加而减少,共存离子和腐殖酸对TAOR树脂吸附CR有一定的抑制作用。CR在TAOR上的吸附过程符合拟二级动力学吸附模型,Langmuir等温吸附符合模型可以很好地描述TAOR对溶液中CR的吸附过程,最大吸附量为101.9mg/g(pH=6.0和25℃)。吸附热力学结果表明,CR在TAOR上的吸附是一个自发的物理吸附过程,其吸附机制单层子化学作用控制机制。FT-IR和X射线光电子能谱技术(XPS)结果进一步显示,TAOR上的氧化胺结构参与CR吸附。脱附再生实验发现,1.0mol/L NaOH溶液脱附效果最优,经5次循环再生使用,TAOR的吸附性能没有明显下降。Using dimethylaminoethyl methacrylate as the monomer and trimethylolpropane trimethacrylate as the crosslinking agent,tertiary amine resin(TAR)was prepared by suspension polymerization,and then tertiary amine oxide resin(TAOR)was prepared by H_(2)O_(2) modification.The structures of TAOR were characterized by field emission scanning electron microscopy(SEM),Fourier transform infrared spectroscopy(FT-IR),nitrogen adsorption-desorption isotherms,and thermogravimetric(TG)techniques.Congo Red(CR)was selected as the model pollutant,and the optimal synthesis process of TAOR was optimized and investigated by orthogonal test.The effects of TAOR dosage,solution pH,ionic strength,and coexisting components on the adsorption performance of CR in water were investigated,and the adsorption kinetics during the adsorption process were simulated.The results showed that the adsorption amount of CR decreased with the increase of pH and ionic strength,and the coexisting ions and humic acid had a certain inhibitory effect on the adsorption of CR by the TAOR resin.The adsorption kinetics of CR on TAOR followed to the pseudo second-order kinetic adsorption model,and the Langmuir isotherm model could well describe the adsorption process of CR in solution by TAOR,with a maximum adsorption capacity of 101.9mg/g(at pH 6.0 and 25℃).Thermodynamic results indicated that the adsorption of CR on TAOR was a spontaneous physical adsorption process,with monolayer chemisorption as the controlling mechanism.The combined results of FT-IR and X-ray photoelectron spectroscopy(XPS)further showed that the amine oxide structure on TAOR was involved in the adsorption of CR.Desorption and regeneration experiments revealed that the TAOR resin had the best desorption effect in 1.0mol/L NaOH solution,and its adsorption performance didn t decrease significantly after five regeneration cycles.

关 键 词：叔胺吸附树脂 合成 刚果红 吸附 吸附机理 

分 类 号：TQ322.4[化学工程—合成树脂塑料工业] TQ424