A novel porous hollow carboxyl-polysulfone microsphere for selective removal of cationic dyes

Shangying Zhang; Fengna Dai; Zhao Ke; Qi Wang; Chunhai Chen; Guangtao Qian; Youhai Yu

doi:10.1016/j.chemosphere.2021.133205

A novel porous hollow carboxyl-polysulfone microsphere for selective removal of cationic dyes

Chemosphere. 2022 Feb:289:133205. doi: 10.1016/j.chemosphere.2021.133205. Epub 2021 Dec 8.

Authors

Shangying Zhang¹, Fengna Dai¹, Zhao Ke¹, Qi Wang¹, Chunhai Chen², Guangtao Qian³, Youhai Yu⁴

Affiliations

¹ Center for Advanced Low-Dimension Materials, State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Innovation Center for Textile Science and Technology, Donghua University, Shanghai, 201620, China.
² Center for Advanced Low-Dimension Materials, State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Innovation Center for Textile Science and Technology, Donghua University, Shanghai, 201620, China. Electronic address: cch@dhu.edu.cn.
³ Center for Advanced Low-Dimension Materials, State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Innovation Center for Textile Science and Technology, Donghua University, Shanghai, 201620, China. Electronic address: qgt@dhu.edu.cn.
⁴ Center for Advanced Low-Dimension Materials, State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Innovation Center for Textile Science and Technology, Donghua University, Shanghai, 201620, China. Electronic address: yuyouhai@dhu.edu.cn.

PMID: 34890624
DOI: 10.1016/j.chemosphere.2021.133205

Abstract

Herein, we obtained porous hollow carboxyl-polysulfone (PH-CPSF) microspheres through non-solvent-induced phase separation (NIPS) method and simple modification, used as highly efficient adsorbents for removing cationic dyes from sewage. The resulting PH-CPSF microspheres possess a hollow core and sponge-like shell structure, with high surface area, durable chemical inertness and structural stability. The as-synthesized PH-CPSF microspheres deliver a desirable adsorption effect after deprotonation treatment, with an adsorption capacity reaching up to 154.5 mg g^-1 at 25 °C (pH = 7) of methylene blue (MB). The inter-molecular interactions between MB and the surface of the PH-CPSF, including π-π interaction, hydrogen bonding, strong charge attraction and weak charge attraction endow the adsorption ability of the PH-CPSF. The pseudo-second-order kinetic model pronounces in the adsorption behavior, and the adsorption equilibrium data is fitted to the Langmuir model. Moreover, PH-CPSF microspheres can also be used as adsorption fillers for large-scale water purification, and a removal rate of 94.0% for MB can be achieved under a flow rate of 8000 L m^-3 h^-1. The reusability of 95.3% removal effect for PH-CPSF microspheres after 20 consecutive cycles can be attained by a simple regeneration treatment. The adsorption efficiency of the PH-CPSF microspheres was evaluated by variety of cationic and anionic dyes, with high adsorption capacity toward cationic dyes (100%) and less than 10% toward anionic dyes. These results manifest that PH-CPSF microspheres are a potential adsorbent with long-term purification capabilities, which are expected to be used in small and large-scale sewage treatment.

Keywords: Carboxyl-polysulfone; Click reaction; Porous hollow microsphere; Reusable absorbent; Selective adsorption.

MeSH terms

Adsorption
Coloring Agents*
Microspheres
Polymers
Porosity
Sulfones
Water Pollutants, Chemical*

Substances

Coloring Agents
Polymers
Sulfones
Water Pollutants, Chemical
polysulfone P 1700