文献类型：期刊文献

英文题名：A novel amphoteric β-cyclodextrin-based adsorbent for simultaneous removal of cationic/anionic dyes and bisphenol A

作者：Zhou, Yanbo[1,2];Hu, Yonghua[1];Huang, Weiwei[1,2];Cheng, Guang[1];Cui, Changzheng[3];Lu, Jun[1]

机构：[1]East China Univ Sci & Technol, Minist Educ, Key Lab Coal Gasificat & Energy Chem Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]Shanghai Inst Pollut Control & Ecol Secur, 1515 Zhongshan Second North Rd, Shanghai 200092, Peoples R China;[3]East China Univ Sci & Technol, State Environm Protect Key Lab Environm Risk Asse, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2018

卷号：341

起止页码：47

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20181304963963);WOS:【SCI-EXPANDED(收录号:WOS:000445561100005)】；

基金：The authors would like to express their sincere gratitude to the National Natural Science Foundation of China (51778230), Shanghai Rising-Star Program (17QA1401000) and the Fundamental Research Funds for the Central Universities for their financial support.

语种：英文

外文关键词：Bisphenol A; Methylene blue; Methyl orange; beta-Cyclodextrin; Amphoteric adsorbent

摘要：The coexistence of anionic dye, cationic dye and endocrine-disrupting chemicals (EDCs) in dyeing wastewater has highlighted a great necessity to develop new and effective approaches for their simultaneous removal. In this study, a novel amphoteric adsorbent was successfully synthesized using a two-step strategy, starting with the preparation of citric acid (CA) crosslinked beta-cyclodextrin (CD) polymer (CD/CA) through esterification reactions, followed by the grafting of 2-dimethylamino ethyl methacrylate monomer (PDMAEMA) through polymerization reaction. Adsorption performance of the synthesized material (CD/CA-g-PDMAEMA) toward EDCs (bisphenol A, BPA), cationic dye (methylene blue, MB) and anionic dye (methyl orange, MO) in the monocomponent and multicomponent systems were evaluated. The adsorbent showed a maximum adsorption capacity (q(max)) of 79.0 mg/g for BPA at pH 6.5, 165.8 mg/g for MO at pH 4.0 and 335.5 mg/g for MB at pH 11.0, respectively. By altering the solution pH, zeta-potential of the adsorbent could be changed, endowing the material with selective adsorption properties toward anionic or cationic dyes, while BPA adsorption efficiency was vastly insusceptible to the changes in solution pH from 2.0 to 10.0. These characteristics are beneficial for the application of CD/CA-g-PDMAEMA in real wastewaters treatment. In addition, the pseudo-second-order model fitted well with the experimental data in both monocomponent and multicomponent systems, and the adsorption mechanisms were proposed: BPA could form inclusion complex with beta-cyclodextrin cavities, while MB and MO molecules could interact with the carboxyl and tertiary amino groups on CD/CA-g-PDMAEMA through electrostatic attractions.