Eco-friendly zinc-chitosan/poly(L-lactic acid)/polyurethane nanocomposites for dye removal and antimicrobial wastewater treatment.

ABSTRACT: This research explores the development of sustainable zinc-chitosan/poly(L-lactic acid)/polyurethane (ZnCS/PLA/PU) nanocomposites for the dual-purpose treatment of wastewater by removing Acid Blue 25 dye and inhibiting pathogens. The nanocomposites were synthesized at ZnCS-to-PU ratios of 4:1 (ZCPP41), 1:1 (ZCPP11), and 1:4 (ZCPP14) and feature particle sizes of 191-365 nm and zeta potentials ranging from + 39.1 to -9.7 mV. ZCPP41 demonstrates an impressive adsorption capacity of 142 ± 1.9 mg/g and 98.8% removal efficiency at pH 2, facilitated by electrostatic interactions below a pHzpc of 5.6, complemented by charge-assisted hydrogen bonding and surface complexation through chitosan's -OH and -NH₂ groups. Kinetic studies align with the pseudo-second-order model (k₂ = 0.0071 g/mg min, R² =

SUBMITTER: Ragab MM 

PROVIDER: S-EPMC12436595 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature