In this work, iron oxide nanoparticles (Fe₃O₄ NPs) were modified by chitosan (CS). Fe₃O₄ NPs were synthesized by co-precipitation method and their antimicrobial potential and photo-catalytic degradation of Chloramine T (CT) were investigated. The free Fe₃O₄ NPs and chitosan-coated Fe₃O₄ NPs (CS-Fe₃O₄ NPs) were characterized by XRD, FTIR, SEM, and HRTEM. Fe₃O₄ NPs have spherical shape and their diameter varied from 18.0 nm to 25.0 nm with average particle size at 21.0 nm. Antimicrobial activity was tested towards some pathogenic bacteria and Candida cells as zone of inhibition (ZOI) and minimum inhibitory concentration (MIC). UV-assisted photocatalytic degradation of CT was investigated. Various parameters affecting the photocatalytic efficiency such as (pH on CT removal, CT initial concentration, and adsorbent dose) were studied. Antimicrobial results showed that CS-Fe₃O₄ NPs possesses a maximum potential against Escherichia coli, Bacillus subtilis and Candida albicans, by 18.0, 17.0, 14.2 mm ZOI, respectively. Results obtained from the photocatalytic activity indicated that CS-Fe₃O₄ NPs (2.0 gm/l) possessed a promising removal potential, achieving 86.0% removal of CT in the neutral solution (pH = 7.0). The synthesized CS-Fe₃O₄ NPs are effective for the removal of CT and potent disinfectant agent for pathogenic microbes with possible application in the wastewater treatment.

在这项工作中，氧化铁纳米粒子（Fe ₃ O ₄ NPs）被壳聚糖（CS）改性。通过共沉淀法合成了Fe ₃ O ₄ NPs，研究了其对氯胺T（CT）的抗菌潜力和光催化降解性能。通过XRD，FTIR，SEM和HRTEM对游离的Fe ₃ O ₄ NPs和壳聚糖包覆的Fe ₃ O ₄ NPs（CS-Fe ₃ O ₄ NPs）进行表征。铁₃ O ₄NP具有球形形状，其直径在18.0nm至25.0nm之间变化，平均粒径为21.0nm。测试了对某些病原细菌和念珠菌细胞的抑菌活性，分别为抑菌圈（ZOI）和最小抑菌浓度（MIC）。研究了UV辅助的光催化降解CT。研究了影响光催化效率的各种参数，例如（去除CT时的pH，CT初始浓度和吸附剂剂量）。抗菌结果表明，CS-Fe ₃ O ₄ NP具有最大的抗大肠杆菌，枯草芽孢杆菌和白色念珠菌的潜力。分别为18.0、17.0和14.2毫米ZOI。从光催化活性获得的结果表明，CS-Fe ₃ O ₄ NPs（2.0 gm / l）具有广阔的去除潜力，在中性溶液（pH = 7.0）中CT去除率为86.0％。合成的CS-Fe ₃ O ₄ NPs可以有效去除CT和病原微生物的有效消毒剂，并有可能在废水处理中应用。