1. A double-crosslinked cyclodextrin-based porous polymer for effective removal of bisphenol A: Preparation, adsorption behavior and mechanism.
- Author
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Chen, Hongni, Xu, Hui, Zhang, Ye, Zhou, Junyuan, He, Jiaojie, Wang, Wentao, Yuan, Chunbo, Zhao, Chuanliang, and Yang, Liwei
- Subjects
BISPHENOL A ,POROUS polymers ,BISPHENOLS ,NUCLEOPHILIC substitution reactions ,ADSORPTION (Chemistry) ,ADSORPTION capacity ,ENDOCRINE disruptors - Abstract
As a sort of typical endocrine-disrupting chemical, bisphenol A (BPA) brings potential harm to the aquatic ecosystem and human health. Cyclodextrin-based polymer adsorbents have attracted increasing attention due to their high affinity for BPA. In this study, we demonstrated a double cross-linking adsorbent BDE-T-CDP(B) prepared at an optimal ratio, which was green synthesized by simultaneous ring-opening and nucleophilic substitution reaction of beta-cyclodextrin (β-CD), a rigid crosslinker (tetrafluoroterephthalonitrile, TFTPN) and a flexible crosslinker (1,4-butanediol diglycidyl ether, BDE) in the alkaline aqueous system, avoiding the involvement of organic solvents. The combined effects of cavity inclusion, π-π interaction, and hydrogen bonding endowed BDE-T-CDP(B) to exhibit superior adsorption capacity (71.30 mg⋅g
−1 ) toward grabbing BPA, which was visualized by IGM analysis. BDE-T-CDP(B) with porous structures was found to rapidly achieve adsorption equilibrium governed by the pseudo-second-order kinetic model (R2 > 0.99) within 30 min. Besides, BDE-T-CDP(B) could still reach 94.7% of the saturated adsorption capacity after five successive regeneration cycles. Further, during the treatment of practical plastic factory wastewater with trace BPA pollutants, the satisfactory adsorption performance of BDE-T-CDP(B) was evidently observed. Thus, BDE-T-CDP(B) is a promising engineering adsorbent owing to its green preparation, excellent adsorption performance, and good recyclability. [Display omitted] • BDE-T-CDP(B) was made from rigid and soft crosslinking agents at an optimal ratio. • It is green and facile to synthesize BDE-T-CDP(B) to avoid organic solvents. • Bisphenol A was captured by hydrogen bonding, cavity inclusion, and π-π interaction. • The maximum BPA adsorption capacity of BDE-T-CDP(B) was 71.30 mg/g. • BDE-T-CDP(B) kept satisfactory BPA removal rates in realistic effluent. [ABSTRACT FROM AUTHOR]- Published
- 2023
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