Ared SA/PVP/TiO2 nanocomposite beads advocate their use as efficient, eco-friendly supplies for the treatment of wastewaters contaminated with cationic dyes. Search phrases: hydrogel nanocomposite beads; sodium alginate; polyvinylpyrrolidone; cationic dye; photodegradationCitation: Elessawy, N.A.; Gouda, M.H.; Elnouby, M.S.; Zahran, H.F.; Hashim, A.; Abd El-Latif, M.M.; Santos, D.M.F. Novel Sodium Alginate/Polyvinylpyrrolidone/TiO2 Nanocomposite for Effective Removal of Cationic Dye from Aqueous Solution. Appl. Sci. 2021, 11, 9186. https://doi.org/10.3390/app11199186 Academic Editor: Adina Magdalena Musuc Received: 6 September 2021 Accepted: 30 September 2021 Published: two OctoberPublisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations.1. Introduction The release of dye-contaminated wastewaters from unique industries [1] in to the atmosphere leads to dramatic effects around the living life of our planet, as dyes and their sub-products are normally toxic or mutagenic agents [2]. Unique procedures are utilized to treat waters polluted with dyes, like adsorption [3,4], photocatalysis [5], biological procedures [6,7], coagulation, and flocculation [8]. Not too long ago, photocatalysis SB-612111 Purity degradation has been employed broadly to take away several organic [9] and inorganic [10] wastewater contaminants by transforming them into nonhazardous components. Certainly one of the semiconductor components most normally utilized as a photocatalyst to get rid of several contaminants from wastewaters is titanium dioxide (TiO2 ), which was studied as a photocatalyst for the first time in 1972 by Fujishima and Honda [11]. TiO2 is actually a non-toxic and bio-friendly material, chemically stable, photostable, commerciallyCopyright: 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access post distributed below the terms and situations with the Inventive Commons Attribution (CC BY) license (https:// creativecommons.org/licenses/by/ 4.0/).Appl. Sci. 2021, 11, 9186. https://doi.org/10.3390/apphttps://www.mdpi.com/journal/applsciAppl. Sci. 2021, 11,2 Thalidomide D4 Technical Information ofavailable with a low expense value, has higher transparency to visible light, and may be activated with sunlight or UV radiation [12,13]. The issue relating to the application on an industrial scale of TiO2 nanostructures is definitely the low adsorption of organic pollutants, uniform distribution of nanoparticles, plus the sluggish separation and recovery of nanosized particles in the course of the approach of wastewater treatment. Supporting TiO2 nanostructures on a polymeric matrix can overcome this difficulty. TiO2 incorporated into a calcium (Ca)-alginate film matrix was utilized as a photocatalyst to take away methyl orange with 82.two effectiveness following 120 min of UV irradiation [14]. ZnO and TiO2 nanoparticles embedded into Ca-alginate beads have been also used as a photocatalyst to get rid of copper ions [10]. By using cross-linked sodium alginate (SA) with TiO2 , forming a SA iO2 hydrogel, an adsorption efficiency for methyl violet dye of 99.6 was reported, whereas SA-based film only accomplished 85 . This impact was attributed for the electrostatic attraction amongst the methyl violet dye and TiO2 , which behaves as an anionic center inside the hybrid hydrogel [15]. However, after two cycles of reuse, the SA iO2 hybrid film was nevertheless helpful in degrading Congo red under UV light, with no appreciable loss of catalytic activity [16]. Generally, adsorption-photocatalytic degradation of dyes is favored u.
