| 초록 |
As increasing concerns about public health and environmental problems arising from toxic substances, the development of highly effective and specific treatment method is imperative. Here we report the development of magnetic iron nanoparticles immobilized an extremophilic microorganism, Deinococcus radiodurans R1 (DR-FeNPs), capable of removing toxic arsenic species. First, in vivo synthesis of magnetic iron nanoparticles were successfully achieved by D. radiodurans R1 strain and characterized by SEM-EDX, DLS, Zeta potential, XRD, XPS, and FT-IR analysis. Second, the maximum adsorption capacity of DR-FeNPs for arsenic [As(V)] was evaluated under the optimized conditions. Finally, the adsorption capacity of DR-FeNPs under the presence of various competitive anions was also investigated. As a result, more than 98.01% of As(V) was efficiently removed by the DR-FeNPs within 1 h and the removal efficiency was maintained stable for up to 32 h (98.97%).
|
