Novel nanoporous membranes of bio-based cellulose acetate, poly(lactic acid) and biodegradable polyurethane in-situ impregnated with catalytic cobalt nanoparticles for the removal of Methylene Blue and Congo Red dyes from wastewater

• DOI: 10.1016/j.carpta.2021.100123
• Publication Date: 2021-07-16T07:33:43Z
• Authors: Mayyada M.H. El-S...; Rasha E. Elsayed; Aya Attia; Hebatullah H. Far...; Rasha A. Azzam; Tarek M. Madkour
• Keywords: Congo red; Nanoporous; Methylene blue; Cellulose acetate

The discharge of contaminants emerging concern (CECs) into water streams is becoming a major global issue. Herein, novel nanoporous membranes bio-based cellulose acetate, poly(lactic acid) and biodegradable polyurethane in-situ impregnated with catalytic cobalt nanoparticles were synthesized tested for the removal Methylene Blue (MB) Congo Red (CR) dyes from water. polymers supported formation network hydrogen bonding among different functional groups as confirmed using FTIR, which improved membrane stability. Porogen was used to create nanopores within film bulk, impregnate that ensured adsorption, degradation hazardous polluted Up almost 60% each MB CR removed under UV irradiation, while adsorption well described by Linear Langmuir isotherms, respectively. thermodynamic study showed process dissociative and, thus, involves photocatalytic dye degradation. Both exhibited same overall rate but faster diffusion predicted intra-particle model. Loading biopolymeric matrix could potentially reduce risks their environmental release free particles in effluents.