化工环保2017，Vol.37Issue(5)：519-524,6.DOI:10.3969/j.issn.1006-1878.2017.05.005
二乙烯三胺改性聚多巴胺包覆硅胶吸附日落黄
Adsorption of sunset yellow by diethylenetriamine modified polydopamine-coated silica gel
摘要
Abstract
SG@DETA/PDA was prepared by modifying polydopamine (PDA) coated silica gel (SG) with diethylenetriamine (DETA).The morphology and structure of SG@DETA/PDA were characterized by FTIR,SEM and N2 adsorptiondesorption isotherms measurement.The adsorption effects of sunset yellow (SY)on SG@DETMPDA were investigated.The characteristic results showed that a relatively dense coating layer consisting of agglomerate PDA microspheres were formed on the surface of SG@DETA/PDA,whose specific surface area and pore volume were a little higher than those of SG@PDA.The experimental results indicated that under the optimum conditions for SY adsorption on SG@DETA/PDA of solution pH 2.0,adsorption time 2.0 h,initial dye mass concentration 150 mg/L,adsorption temperature 298 K,the adsorption capacity of SG@DETA/PDA to SY was 175.56 mg/g.The adsorption process fitted the pseudo-second-order kinetics equation and Langmuir adsorption isotherm equation well.This adsorption process was a monolayer adsorption by means of electrostatic interaction,and was also an endothermic,spontaneous and entropy increment process.关键词
二乙烯三胺/聚多巴胺/硅胶/吸附剂/日落黄Key words
diethylenetriamine/polydopamine/silica gel/adsorbent/sunset yellow分类
资源环境引用本文复制引用
林荣辉,凌云霞飞,吕海霞,林旭聪..二乙烯三胺改性聚多巴胺包覆硅胶吸附日落黄[J].化工环保,2017,37(5):519-524,6.基金项目
国家自然科学基金青年项目(21307013) （21307013）
福建省自然科学基金项目(2015J01044). （2015J01044）
