A novel multifunctional β-cyclodextrin polymer as a promising sorbent for rapid removal of methylene blue from aqueous solutions

Jakub Lagiewka; Anna Nowik-Zajac; Anna Pajdak; Iwona Zawierucha

doi:10.1016/j.carbpol.2023.120615

A novel multifunctional β-cyclodextrin polymer as a promising sorbent for rapid removal of methylene blue from aqueous solutions

Carbohydr Polym. 2023 May 1:307:120615. doi: 10.1016/j.carbpol.2023.120615. Epub 2023 Jan 27.

Authors

Jakub Lagiewka¹, Anna Nowik-Zajac², Anna Pajdak³, Iwona Zawierucha²

Affiliations

¹ Institute of Chemistry, Faculty of Science and Technology, Jan Dlugosz University in Czestochowa, Czestochowa 42-200, Poland. Electronic address: jakub.lagiewka@doktorant.ujd.edu.pl.
² Institute of Chemistry, Faculty of Science and Technology, Jan Dlugosz University in Czestochowa, Czestochowa 42-200, Poland.
³ Strata Mechanics Research Institute, Polish Academy of Sciences, 30-059 Krakow, Poland.

PMID: 36781275
DOI: 10.1016/j.carbpol.2023.120615

Abstract

Production wastewater has evolved with dye and printing technology to become one of the major sources of soil and water contamination. The majority of dyes are carcinogenic, teratogenic, and mutagenic compounds. As a result, dealing with the dye in the wastewater is a critical issue. Insoluble polymers of β-cyclodextrin (β-CD), an inexpensive, sustainably produced macrocycle of glucose, have potential to remove dyes from water/wastewater via sorption due to formation of well-defined host-guest complexes. A novel polymeric sorbent based on cyclodextrin was successfully synthesized in a one-step reaction with few reagents. The polymer is characterized by multifunctionality and cross-linked network structure. The sorption studies aimed at the removal of methylene blue (MB) from aqueous solutions. The dominant model was Langmuir isotherm which indicated a sorption capacity of 96.15 mg/g. The rapid removal has already been obtained after 1 min, around 84 % of efficiency. The molecular mechanism of MB sorption by poly(β-CD-BPDA) network is found mostly on the electrostatic interactions and partially on the inclusion of complexation inside supramolecular pores based on cyclodextrins' cavities, hydrogen bonding and slightly π-stacking. The presented polymer seems to be a promising sorbent for the removal of hazardous organic pollutants from water/wastewater.

Keywords: Cationic dyes; Cyclodextrin polymers; Organic pollutants; Sorbents; Water treatment.