Rapid removal of Cr(III) from high-salinity wastewater by cellulose-g-poly-(acrylamide-co-sulfonic acid) polymeric bio-adsorbent. (15th October 2021)

• Record Type: Journal Article
• Authors: Liu, Jianting; Chen, Yicong; Jiang, Shuyu; Huang, Jianhui; Lv, Yuancai; Liu, Yifan; Liu, Minghua
• Is Part Of: Carbohydrate polymers. Volume 270(2021)
• Publication Date: 2021-10-15
• Subjects: Cellulose -- Sulfonic group -- Adsorption -- Cr(III) -- Leather wastewater; Polysaccharides -- Periodicals; Polysaccharides -- Periodicals; Polysaccharides -- Périodiques; Electronic journals; 547.78
• DOI: 10.1016/j.carbpol.2021.118356
• Languages: English
• ISSNs: 0144-8617

Abstract

Abstract: A cellulose-g-poly-(acrylamide-co-sulfonic acid) polymeric bio-adsorbent (CASA) was prepared by grafting copolymerization, and used to adsorb Cr(III) from leather wastewater. The SEM, XRD, FTIR, and XPS results showed that CASA contains many spherical particles and functional groups such as NH2, CO, and HSO3 . The adsorption experiments revealed that CASA presented excellent adsorption performance for Cr(III) (274.69 mg/g of max adsorption capacity) from high-salinity wastewater, which was much better than other reported adsorbents with different structures. Meanwhile, adsorption equilibrium could be reached within 10 min due to the introduction of abundant sulfonic acid groups on its surface. In addition, the adsorption process followed the Langmuir adsorption isotherm, and the experimental data conformed to the pseudo-second-order kinetics model. Moreover, the main adsorption mechanisms include chelation, electrostatic interactions, and cation exchange, which provide an important theoretical basis for the removal of toxic inorganic pollutants from leather wastewater. Graphical abstract: Unlabelled Image Highlights: Bio-adsorbent was prepared through grafting copolymerization. Adsorbent showed better Cr(III) removal from high-salt solution than water samples. The sulfonated bio-adsorbent could reach adsorption equilibrium within 10 min. The adsorption capacity reached 274.69 mg/g and mechanism was further discussed.