文献类型：期刊文献

英文题名：Scavenging Mechanism of Textile Dyes in Water by Enol-Keto Tautomerism Covalent Organic Framework/Chitosan Composites

作者：Ji, Zhihao[1,2];Li, Manli[1,2];Li, Xiaohong[3];Jin, Enqi[1];Linghu, Wensheng[4]

机构：[1]Shaoxing Univ, Coll Text & Apparel, Shaoxing 312000, Peoples R China;[2]Key Lab Clean Dyeing & Finishing Technol Zhejiang, Shaoxing 312000, Peoples R China;[3]Shaoxing Yongfeng Text Printing & Dyeing Co Ltd, Shaoxing 312073, Peoples R China;[4]Shaoxing Univ, Coll Chem & Chem Engn, Shaoxing 312000, Peoples R China

年份：2023

外文期刊名：FIBERS AND POLYMERS

收录：SCI-EXPANDED(收录号：WOS:000975571000002)、、EI(收录号：20231713950263)、Scopus(收录号：2-s2.0-85153115207)、WOS

基金：AcknowledgementsThis work was financially supported by Technological Research Project for Public Welfare of Zhejiang Province (LGG18B070002; LGG21E030005; LGG22E030002), Postdoctoral Research Program of Zhejiang Province of China (276089), and Project of Key Laboratory of Clean Dyeing and Finishing Technology of Zhejiang Province (QJRZ1902).

语种：英文

外文关键词：TpPa COF; Chitosan; Adsorption; Ionic dye; Scavenging mechanism

外文摘要：In view of the serious environmental pollution caused by organic dyestuff in textile printing and dyeing wastewater, a kind of covalent organic framework (COF) with high water stability-TpPa COF was synthesized by a combination of reversible Schiff-base reaction and irreversible enol-keto tautomerism. The TpPa COF was mechanically blended with chitosan (CS) and was used as a composite adsorbent, i.e., TpPa COF/CS. The aqueous solutions containing acid mordant brown (AMB) dye and methylene blue (MB) dye were employed to simulate anionic and cationic dyeing wastewater, respectively. The adsorption mechanism of TpPa COF/CS composites for the anionic and cationic dyes was investigated and the adsorption thermodynamics and kinetics were studied. The TpPa COF/CS composites (W-COF/W-CS: 1/4 and 2/1) exhibited high adsorbing capacities (q(max): 1287.6 and 831.3 mg/g) for AMB and MB dyes at initial pH 4.0 and 9.0, respectively. The adsorption kinetics of both the ionic dyes followed the pseudo-second-order kinetic model well. In addition, the adsorption isotherms of both the dyes fitted well with Langmuir model. The COF/CS composite adsorbent was a promising economical material for the removal of ionic dyes from aqueous solutions.