Magnetic chitosan functionalized with β‐cyclodextrin as ultrasound‐assisted extraction adsorbents for the removal of methyl orange in wastewater coupled with high‐performance liquid chromatography

Abstract

Three types of choline chloride based deep eutectic solvents were prepared and used to modify magnetic chitosan. The adsorption capacity of the three deep-eutectic-solvent-modified magnetic chitosan/carboxymethyl-β-cyclodextrin for removing methyl orange from wastewater was examined. The different deep eutectic solvents were used to strengthen the adsorption capacity of magnetic chitosan. Deep-eutectic-solvent-modified magnetic chitosan/carboxymethyl-β-cyclodextrin materials were characterized by Fourier transform infrared spectroscopy and Brunauer-Emmett-Teller surface area measurements. Among the three deep eutectic solvents, choline chloride/glycerol (1:2) modified magnetic chitosan/carboxymethyl-β-cyclodextrin showed the highest adsorption capacity to methyl orange. Therefore, choline chloride/glycerol (1:3, 1:4, 1:5, 1:6) deep eutectic solvents were prepared for the assay, and choline chloride/glycerol-modified magnetic chitosan/carboxymethyl-β-cyclodextrin prepared with choline chloride/glycerol (1:3) (volume: 40 μg, contact time: 30 min, and pH: 6) had the best adsorption capacity over the concentration range of 10-200 μg/mL.

Accessible Eco-Friendly Method for Wastewater Removal of the Azo Dye Reactive Black 5 by Reusable Protonated Chitosan-Deep Eutectic Solvent Beads

“…DESs offer an attractive cost-effective alternative as the substitutes of ionic liquids and organic solvents, since they are simple to synthesize and the majority of them are characterized by their non-toxicity and biodegradability. To date, they have been scarcely used for dye removal [10], and only a few studies have combined DES with polymers to obtain eco-friendly adsorbents [11][12][13][14][15].…”

Metal‐organic framework functionalized with deep eutectic solvent for solid‐phase extraction of Rhodamine 6G in water and cosmetic products

“…It is very important to develop an environmentally friendly, efficient, low-cost, accurate, and effective adsorbent in the adsorption process. For this reason, the development of processes that use highly accurate, sensitive, innovative, and environmentally friendly adsorbents for the analysis of dyestuff pollution, which adversely affects both the ecosystem and human health through direct contact, remains up-to-date [12][13][14][15][16][17][18][19][20].…”

Removal of Azo Dyes Orange II and Reactive Black 5 from Aqueous Solutions by Adsorption on Chitosan Beads Modified with Choline Chloride: Urea Deep Eutectic Solvent and FeO

“…Combinations of chitosan with deep eutectic solvents (DES) offer a seldom-explored possibility to obtain eco-friendly, non-toxic, biodegradable, accessible, and cost-effective materials with interesting structural properties [20,21] and improved adsorption capacities to remove pollutants from wastewaters [16,[22][23][24]. DES are compounds that are obtained by combining pure chemicals, which act as hydrogen bond donors and acceptors for given molar proportions.…”