Ecofriendly chitosan-based super sorbent obtained under microwave radiation for valuable metals recovery from wastewater. (August 2022)

• Record Type: Journal Article
• Authors: Radwan-Pragłowska, Julia; Janus, Łukasz; Sierakowska, Aleksandra; Piątkowski, Marek; Galek, Tomasz; Szajna, Ernest; Tupaj, Mirosław; Radomski, Piotr; Bogdał, Dariusz
• Is Part Of: Polymer testing. Volume 112(2022)
• Publication Date: 2022-08
• Subjects: sorbent -- Precious metals recovery -- Chitosan; Polymers -- Testing -- Periodicals; Polymères -- Tests -- Périodiques; 620.1920287
• DOI: 10.1016/j.polymertesting.2022.107629
• Languages: English
• ISSNs: 0142-9418

Abstract

Abstract: This paper deals with the preparation and characterization of novel super-sorbent materials prepared from chitosan under microwave-assisted conditions according to Sustained Development principles applicable in valuable metals recovery. For their obtainment, waste oil has been applied which was used as a raw material for azelaic acid eco-synthesis further applied to modify chitosan. Sorbents were tested over their physicochemical properties and ability to recover precious metals ions: silver, copper, and gold by determining sorption capacity and removal efficiency. The sorption behaviors were in the most cases predictable on the contrary to currently known sorbents of biological origin which shows a high commercial potential of the newly developed sorbents. The best results were obtained for gold ions; however, the proposed sorbents exhibit versatility and may be applied to recover various metals. Proposed materials constitute a promising alternative to waste-derived sorbents which despite low price have irrecoverable characteristics. Highlights: Chitosan-based supersorbents were obtained under MW-conditions using azelaic acid. Sorbents were investigated over physiochemical properties and morphology. Possibility of Ag +, Cu 2+ and Au 3+ ions sorption was studied. Sorption capacity and removal efficiency were determined. Kinetic profiles for each ion type were calculated.