Antibacterial and lead ions adsorption characteristics of chitosan-manganese dioxide bionanocomposite

In the current study, a facile and an eco-friendly manganese oxide nanoparticles dispersed in chitosan (CS-MnO2) nanocomposite was synthesized. A chemical precipitation method was used for the product synthesis. The product characterization was performed using various spectroscopic techniques such as X-ray scattering, scanning electron microscopy, Fourier transform infrared spectroscopy, thermogravimetric analysis and zeta potential which confirmed its successful formation. The CS-MnO2 nanocomposite was evaluated in the Pb2+ ions adsorption from it aqueous solution. The CS-MnO2 showed an approvable accomplishment for the removal of Pb2+ ions and evidence was provided from the adsorption experiments. The efficiency of adsorbent did not change much even after 5 cycles of reuse. Therefore, CS-MnO2 would serve as promising adsorbent. Additionally, the CSMnO2 nanocomposite showed low to moderate antibacterial efficacy against Escherichia coli and Staphylococcus aureus by inhibiting nearly 50% of the bacterial growth. Colony forming units method was used in the antibacterial studies which showed that the bio-nanocomposite had moderate antibacterial activity against the stated strains of bacteria. (C) 2018 Elsevier B.V. All rights reserved.