Functionalization of magnetic chitosan microparticles for high-performance removal of chromate from aqueous solutions and tannery effluent

• Functionalization of magnetic-chitosan microparticles for chromate removal. High efficiency and selectivity imidazole carboxamide derivative. Sorption capacities as high 6 mmol Cr g −1 , at pH 2 (including Cr(VI) reduction). Sips pseudo-first order rate equations isotherm kinetic fitting, resp. Highly efficient desorption with 0.5 M HCl sorbent recycling (5 cycles). Textile tannery industries are highly contaminating discharge concentrations. Developing bio-based sorbents strong affinity chromate, fast kinetics, recyclability is strategic better reuse industrial wastewater. Magnetic chitosan micro-particles (MC, enhancing mass transfer) may constitute a solution removal from acidic solutions. The functionalization this support aminothiazole groups (ATA@MC) or (AIC@MC) significantly improves removal, sorption close to 2. Langmuir the finely fit isotherms, while equation fits well uptake kinetics (equilibrium within 60 min). properties remarkably stable: decreases by less than 6% fifth cycle (while maintains above 99%). selective wastewater (against base metals). FTIR XPS analyses used characterizing materials identifying binding mechanisms reduction into Cr(III)). both showing promising performances in solutions, including very complex solutions such AIC@MC more ATA@MC has broader reactivity wider family metal ions. antimicrobial functionalized characterized determination zone inhibition (ZOI) against Staphylococcus aureus Bacillus subtilis Pseudomonas aeruginosa Escherichia coli Candida albicans : slightly improved compared magnetite microparticles. More generally, Gram - bacteria sensitive + fungus.