高分配系数丙烯酸-氧化石墨烯水凝胶快速吸附吖啶橙动力学研究  

Kinetics studies on rapid adsorption of acridine orange by high distribution coeffi cient hydrogel of acrylic acid and graphene oxide

作　　者：郑凯[1] 朱治超 戴光斌 刘露 高海强 Zheng Kai;Zhu Zhichao;Dai Guangbin;Liu Lu;Gao Haiqiang(Nanjing Institute of Technology,Nanjng 211167,China)

机构地区：[1]南京工程学院,江苏南京211167

出　　处：《皮革制作与环保科技》2021年第21期11-12,共2页Leather Manufacture and Environmental Technology

摘　　要：本文探索了石墨烯水凝胶和H-AA-GO对吖啶橙(简称AO)的吸附动力学。结果表明:当浓度为50 mg/L,在100分钟内,石墨烯水凝胶和H-AA-GO对吖啶橙的去除率分别为35%和99.7%,H-AA-GO对AO吸附分配系数数值,从开始的30 min、0.7增加到2;30~60 min,从2增加到6;60~90 min,从6增加到18;90~120 min内,从18增加至最大值26,呈现较高的分配系数。H-AA-GO对吖啶橙的快速去除率源于羧基基团电离出的氢离子与吖啶橙分子中N带有的孤对电子形成路易斯酸碱。吸附动力学方程拟合数据表明:用准二级动力学描述H-AA-GO对吖啶橙的吸附行为更准确。The hydrogel of acrylic acid and graphene oxide(abbreviation as H-AA-GO)synthesized by suspension copolymerization was characterized by Fourier Transform infrared spectroscopy(FTIR).The adsorption kinetics and mechanism of acridine orange(abbreviation as AO)onto graphene hydrogel and H-AA-GO were investigated.The results showed that,at the initial concentration of 50 mg/L,the removal rates of acridine orange by graphene hydrogel and H-AA-GO reached 35%and 99.7%,respectively within 100 minutes;the adsorption distribution coeffi cient values of H-AA-GO for AO increased from 0.7 to 2(within the first 30 minutes);from 2 to 6(30-60 minutes);from 6 to 18(60-90 minutes);and from 18 to the maximum 26(90-120 minutes)showing the trait of high adsorption selectivity.The rapid removal rate of H-AA-GO to acridine orange was derived from the formation of Lewis acid-base by hydrogen ion ionized from carboxyl group and lone pair electrons of N boned onto acridine orange molecule.The fi tting results of adsorption kinetics equation indicated that the pseudo-second-order kinetics was more accurate in fi tting the adsorption behavior of AO onto P-AA-GO.

关 键 词：氧化石墨烯-丙烯酸水凝胶 分配系数 准二级动力学 

分 类 号：O64[理学—物理化学]