文献类型：期刊文献

英文题名：Selective Adsorption and Separation of Organic Dyes with Spherical Polyelectrolyte Brushes and Compressed Carbon Dioxide

作者：Zhang, Rui[1];Yu, Zhenchuan[1];Wang, Lei[1];Shen, Qizhe[1];Hou, Xiaoyan[1];Guo, Xuhong[1];Wang, Junwei[2];Zhu, Xuedong[1,2];Yao, Yuan[3]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]Collaborat Innovat Ctr Petrochem New Mat, Anqing 246011, Anhui, Peoples R China;[3]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China

年份：2017

卷号：23

期号：55

起止页码：13696

外文期刊名：CHEMISTRY-A EUROPEAN JOURNAL

收录：;EI(收录号：20173704143253);WOS:【SCI-EXPANDED(收录号:WOS:000412193700022)】；

基金：This work is supported by the National Natural Science Foundation of China (21374029, 51573088, 21776076), the Doctoral Fund of Ministry of Education (20130074110018), the Fundamental Research Funds for the central universities of China (22220131011), and "Industry-Education-Research" Funding Sponsored by ECUST.

语种：英文

外文关键词：adsorption; dyes; pigments; environmental chemistry; polymers; wastewater treatment

摘要：Dye-containing wastewater has caused serious environmental pollution. Herein, rationally designed spherical polyelectrolyte brushes (SPBs) with cationic charges, polystyrene-poly(2-aminoethylmethacrylate hydrochloride) (PS-PAEMH) as the absorbent, and compressed carbon dioxide as the antisolvent are proposed for the separation of the anionic dye eosinY (EY) from a solution of mixed dyes. The adsorption behavior of EY onto PS-PAEMH was highly dependent on CO2 pressure, contact time, and initial concentration. The maximum adsorption capacity of PS-PAEMH was 335.20 mg g(-1). FTIR and UV/Vis measurements proved that the electrostatic interactions between EY and PS-PAEMH played an important role in the absorbance process. The adsorption process fitted the pseudo-second-order kinetic model and Freundlich isotherm model very well. The combined dye and polymer brush could be easily separated through ion exchange by adding an aqueous solution of NaCl. Recovered PS-PAEMH retained a high adsorption capacity even after ten cycles of regeneration. This method provides a simple and effective way to separate ionic materials for environmental engineering.