Abstract
Dye effluents of wastewater of textile and other industries, particularly reactive azo dyes, are serious safety and health problem for the environment and living organisms. This study demonstrates the results of the removal of Procion Red MX-5B (PR MX-5B) from an aqueous solution by using cryogels prepared from natural polymers. A polymeric cryogel based on chitosan and gelatin was synthesized by cryogelation via crosslinking reaction of polymers at cryogenic conditions. Chitosan-gelatin cryogel (CH-GEL) crosslinked with glutaraldehyde was utilized for adsorption of PR MX-5B dye from aqueous solutions. The synthesized cryogel was chemically characterized by using Fourier Transform Infrared Spectroscopy (FTIR). The scanning electron microscopy (SEM) was used for the morphological characterization of cryogels. The fabricated cryogel has a highly interconnected and open macroporous structure. The water uptake properties of the cryogel in distilled water was determined. The parameters affecting the adsorption of dyes, such as pH of dye solution, initial concentration of dye and adsorbent dosage were studied. The maximum adsorption capacity of the CH-GEL cryogel for the removal of PR MX-5B in 50 mg/L of dye solution was 64.56 mg/g. The macroporous CH-GEL cryogels, due to their highly interconnected porous structure, can be effectively used as adsorbents to remove the PR MX-5B reactive dye from wastewater sources. As a result, an eco-friendly biosorbent was fabricated for the removal of toxic dye molecules from aqueous solutions.
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Demir, D., Bölgen, N., Vaseashta, A. (2021). Chitosan–Gelatin Cryogels as Bio-Sorbents for Removal of Dyes from Aqueous Solutions. In: Vaseashta, A., Maftei, C. (eds) Water Safety, Security and Sustainability. Advanced Sciences and Technologies for Security Applications. Springer, Cham. https://doi.org/10.1007/978-3-030-76008-3_11
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