丙烯酸水-氧化石墨烯水凝胶吸附氨氮热力学研究  

Thermodynamic Study on Ammonia Nitrogen Adsorption in Acrylic-graphene Oxide Hydrogel

作　　者：郑凯[1] 刘姝邑 杨世骄 丁森鑫 薛启明 郭宇峰 朱鹏飞 ZHENG Kai;LIU Shu-yi;YANG Shi-jiao;DING Sen-xin;XUE Qi-ming;GUO Yu-feng;ZHU Peng-fei(Nanjing Institute of Technology,Jiangsu Nanjing 211167;Taiyuan University of Technology,Shanxi Jinzhong 030024,China)

机构地区：[1]南京工程学院,江苏南京211167 [2]太原理工大学,山西晋中030024

出　　处：《广州化工》2023年第12期83-85,共3页GuangZhou Chemical Industry

基　　金：南京工程学院大学生科技创新项目:“氧化石墨烯-丙烯酸凝胶去除水中低浓度氮氮条件优化及PH对平衡吸附量影响”(TB202312031)。

摘　　要：以丙烯酸为单体,氧化石墨烯为改良剂,在致孔剂、交联剂和引发剂作用下,通过悬浮聚合得到丙烯酸-氧化石墨烯水凝胶(AA-GG),对丙烯酸水凝胶采用傅里叶变换红外光谱测试,结果表明材料中含有甲基、羟基、碳碳双键和氰基。通过静态吸附实验,研究AA-GG对低浓度氨氮的吸附热力学,结果表明,丙烯酸水凝胶对氨氮的吸附容量可达0.035 mmol/g, AA-GG对氨氮吸附符合Freundlich等温吸附方程,且ΔH<0,ΔG<0,ΔS<0,表明氨氮在AA-GG吸附属于可自发进行的物理吸附,吸附过程为放热且伴随熵减少过程。The acrylic acid used as a monomer and graphene oxide as modifying agent reacted each other and obtained product acrylic-graphene oxide hydrogel(AA-GO)by suspension polymerization under the action of production holes agent,crosslinking agent and initiator.AA-GO was characterized by Fourier transform infrared spectrum,the results showed that the material contains methyl,hydroxyl,carbon-carbon double bond and cyanide.The thermodynamics of AA-GG on low concentration ammonia nitrogen was studied by means of static adsorption experiments,the results indicated that the adsorption capacity of acrylic hydrogel on ammonia nitrogen could reach 0.035 mmol/g.The adsorption equilibrium data were agreed with Freundlich adsorption isotherm well.Thermodynamic analysis suggested thatΔH<0,ΔG<0 andΔS<0.The adsorption of ammonia nitrogen on AA-GO was a spontaneous physical adsorption process,the adsorption procedure were exothermic reaction and entropy decrease.

关 键 词：丙烯酸 氧化石墨烯 氨氮吸附 热力学 

分 类 号：TQ914[化学工程]