Adsorption of Bacteria by Highly Efficient, Economic and Biodegradable Magnetic Coated Chitosan Adsorbent

The current research focuses on the adsorption of Escherichia coli (Gram negative) and Staphylococcus aureus (Gram positive) bacteria on magnetic coated chitosan (MCC) adsorbent. The results showed that MCC was found to be an excellent adsorbent for bacteria removal. The structural elucidation of the adsorbent was made by PZC, SEM, TGA, XRD and FT-IR. It was observed that bacteria adsorption was enhanced with increasing concentration of bacteria and dosage of the magnetized chitosan adsorbent. The maximum adsorption capacity (Xm) of bacteria was observed 1 × 1010 CFU·g−1 with 99.5% removal efficiency at 303 K and pH = 7.4. The Langmuir adsorption isotherm was found to be applicable to the equilibrium data and a pseudo-second-order kinetic model described the kinetic data. Thermodynamic studies showed that the adsorption process is endothermic in nature.