Silver nanomaterial-immobilized desalination systems for efficient removal of radioactive iodine species in water

Ha Eun Shim, Jung Eun Yang, Sun Wook Jeong, Chang Heon Lee, Lee Song, Sajid Mushtaq, Dae Seong Choi, Yong Jun Choi, Jongho Jeon

Research output: Contribution to journalArticlepeer-review

33 Scopus citations

Abstract

Increasing concerns regarding the adverse effects of radioactive iodine waste have inspired the development of a highly efficient and sustainable desalination process for the treatment of radioactive iodine-contaminated water. Because of the high affinity of silver towards iodine species, silver nanoparticles immobilized on a cellulose acetate membrane (Ag-CAM) and biogenic silver nanoparticles containing the radiation-resistant bacterium Deinococcus radiodurans (Ag-DR) were developed and investigated for desalination performance in removing radioactive iodines from water. A simple filtration of radioactive iodine using Ag-CAM under continuous in-flow conditions (approximately 1.5 mL/s) provided an excellent removal efficiency (>99%) as well as iodide anion-selectivity. In the bioremediation study, the radioactive iodine was rapidly captured by Ag-DR in the presence of high concentration of competing anions in a short time. The results from both procedures can be visualized by using single-photon emission computed tomography (SPECT) scanning. This work presents a promising desalination method for the removal of radioactive iodine and a practical application model for remediating radioelement-contaminated waters.

Original languageEnglish
Article number660
JournalNanomaterials
Volume8
Issue number9
DOIs
StatePublished - Sep 2018

Keywords

  • Bioremediation
  • Desalination
  • Membrane
  • Nanocomposite
  • Radioactive iodine
  • Silver nanomaterials

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