多巴胺季铵盐功能化无纺布的制备及其对Cr(Ⅵ)的吸附  

Preparation of dopamine quaternary ammonium salt functionalized nonwovens and its adsorption to Cr(Ⅵ)

作　　者：王里达 汪振文 李鑫林 魏亚京 吴雨桐 吕梦浩 刘豪 王会才[2] WANG Lida;WANG Zhenwen;LI Xinlin;WEI Yajing;WU Yutong;LYU Menghao;LIU Hao;WANG Huicai(School of Environmental Science and Engineering, Tiangong University, Tianjin 300387, China;School of Chemical Engineering and Technology, Tiangong University, Tianjin 300387, China)

机构地区：[1]天津工业大学环境科学与工程学院,天津300387 [2]天津工业大学化学工程与技术学院,天津300387

出　　处：《功能材料》2022年第5期5226-5230,5236,共6页Journal of Functional Materials

基　　金：纤维基金项目TGU(TGF—A7);大学生创新训练项目(202110058051);内蒙古科技计划项目(zdzx2018029);天津市科技计划项目(18ZXJMTG00120)。

摘　　要：通过贻贝仿生法制备的材料表面官能团密度低,并且对带负电荷重金属离子没有吸附能力。针对以上问题,提出一种季铵化方法合成了多巴胺季铵盐无纺布。通过吸附实验可知在pH为3时吸附性能最强,能除去95%以上的Cr(Ⅵ)。拟合得到的吸附量最高为31.92 mg/g。XPS分析说明吸附是-NH和季铵盐基团的作用。此外季铵化使再生性能提高,在Cr(Ⅵ)吸附去除领域具有广阔的应用前景。The low density of surface functional groups and the lack of adsorption capacity for negatively charged heavy metal ions are the disadvantages of mussel biomimetic chemical preparation materials.In order to solve the above problems,a dopamine quaternary ammonium salt non-woven fabric adsorbent was prepared by a quaternization method.The adsorption experiment results showed that the maximum adsorption capacity of Cr(Ⅵ)was achieved at pH=3,and the removal efficiency reached 95%.The theoretical maximum adsorption capacity obtained by fitting was 31.92 mg/g.The XPS results showed that the adsorption of Cr(Ⅵ)was related to the quaternary ammonium salt groups and protonated amino groups.In addition,the quaternary ammonium improved the regeneration performance.Dopamine quaternary ammonium salt non-woven show broad application prospects in the field of Cr(VI)adsorption and removal.

关 键 词：吸附 六价铬 多巴胺 无纺布 季铵化 

分 类 号：X703[环境科学与工程—环境工程]