Synthesis of Chitosan-TiO₂ Nanocomposite for Efficient Cr(VI) Removal from Contaminated Wastewater Sorption Kinetics, Thermodynamics and Mechanism

Abstract

materials have been studied to remove the deadly heavy metals from wastewaters, which is one of the promising sustainable mitigation methods 6) . Chromium ions and other heavy metals were removed using a variety of methods, such as adsorption 7,8) , membrane filtering 9) , advanced oxidation 10) , and precipitation 11,12) . Due to its low cost and economy, adsorption is a suitable method for reducing the level of Cr ions. Its effectiveness is dependent on the number of sites that can be combined with adsorbate ions 13) . Nanocomposites produced by the photolysis technique 14−22) are viable options for the adsorption of certain heavy metals from water 23−25) due to their higher specific area and porosity. Heavy metal reduction or removal from water can be accomplished using chitosan-based nanoparticles as an effective catalyst (adsorbate) 26,27) . Chitosan nanosheets have recently been suggested for use in several wastewater treatment processes 28) . Additionally, chitosan s matrix was doped with or mixed with inorganic nanoparticles like TiO 2 and ferrite. For instance, TiO 2 was integrated into CS nanosheets to absorb heavy ions from wastewater.

Antimicrobial finishing of textiles using nanomaterials

“…These microorganisms weigh about 25 times the weight of all animals and in their environment play an effective role in fermentation, production of metabolic compounds, preparation of chemicals (lactic acid and citric acid), finishing off the cycle of returning materials to nature, and adverse effects such as spoilage (Geoprincy et al, 2011;Jia et al, 2012;Ramyadevi et al, 2012). Foods, material degradation, commodity decay, and various diseases occur (Shinde et al, 2013;Paladini et al, 2014;Sundaresan et al, 2011;Al-Obaidi et al, 2023;Kumar et al, 2013). Since textiles, in addition to providing a suitable environment for the growth and multiplication of microbes, can cause the transmission and spread of various diseases, therefore, research has been conducted to produce antimicrobial fibers and textiles with the following objectives (Salimi et al, 2017a, b;Pirouzfar et al, 2014):…”