Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2018 Aug 26;8(9):660.
doi: 10.3390/nano8090660.

Silver Nanomaterial-Immobilized Desalination Systems for Efficient Removal of Radioactive Iodine Species in Water

Ha Eun Shim  1   2 , Jung Eun Yang  3 , Sun-Wook Jeong  4 , Chang Heon Lee  5 , Lee Song  6 , Sajid Mushtaq  7   8 , Dae Seong Choi  9 , Yong Jun Choi  10 , Jongho Jeon  11   12
Affiliations

Silver Nanomaterial-Immobilized Desalination Systems for Efficient Removal of Radioactive Iodine Species in Water

Ha Eun Shim et al. Nanomaterials (Basel). .

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.

Keywords: bioremediation; desalination; membrane; nanocomposite; radioactive iodine; silver nanomaterials.

PubMed Disclaimer

Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
(A) Desalination of radioactive iodine by using Ag-CAM; and (B) bioremediation procedure of radioactive iodine anions using Ag-DR.
Figure 2
Figure 2
Characterization of Ag-CAM: (A) Photographic images of the CAM filter (left) and Ag-CAM (right) prepared using a syringe filter; (B) photographic images of the CAM (left) and Ag-CAM (right) prepared using a vacuum filter holder; (C) SEM–EDX analysis of the CAM (40,000×); and (D) Ag-CAM (100,000×). Yellow arrows in the images indicate AgNPs on cellulose fibers.
Figure 3
Figure 3
(A) Desalination of radioactive iodine using Ag-CAM in several aqueous solutions; (B) SPECT image of post-filtration non-modified CAM; and (C) SPECT image of post-filtration Ag-CAM.
Figure 4
Figure 4
Characterization of Ag-DR: (A) Photographic image of D. radiodurans (left) and Ag-DR (right); (B) UV/vis spectra of D. radiodurans and Ag-DR; and (C) SEM image of D. radiodurans (left, 50,000×), Ag-DR (center, 50,000×), and EDX analysis of Ag-DR (right). Yellow arrows in the images indicate AgNPs on D. radiodurans.
Figure 5
Figure 5
(A) Removal efficiency of Ag-DR in water and 1× PBS; (B) uptake kinetics for removal of radioiodine using smaller concentrations of Ag-DR in water for 15 min (OD = optical density at 600 nm); (C) removal efficiency of freeze-dried Ag-DR in water for 15 min; and D) photographic and SPECT/CT images of Ag-DR and D. radiodurans after 125I− incubation.
See this image and copyright information in PMC

References

    1. Khayet M., Matsuura T. Radioactive decontamination of water. Desalination. 2013;321:1–2. doi: 10.1016/j.desal.2013.05.004. - DOI
    1. Abdel Rahman R.O., Ibrahium H.A., Hung Y.-T. Liquid radioactive wastes treatment: A review. Water. 2011;3:551–565. doi: 10.3390/w3020551. - DOI
    1. Bonnema S.J., Hegedüs L. Radioiodine therapy in benign thyroid diseases effects, side effects, and factors affecting therapeutic outcome. Endocr. Rev. 2012;33:920–980. doi: 10.1210/er.2012-1030. - DOI - PubMed
    1. Prpic M., Dabelic N., Stanicic J., Jukic T., Milosevic M., Kusic Z. Adjuvant thyroid remnant ablation in patients with differentiated thyroid carcinoma confined to the thyroid: A comparison of ablation success with different activities of radioiodine (I-131) Ann. Nucl. Med. 2012;26:744–751. doi: 10.1007/s12149-012-0637-9. - DOI - PubMed
    1. Sabra M.M., Grewal R.K., Ghossein R.A., Tuttle R.M. Higher administered activities of radioactive iodine are associated with less structural persistent response in older, but not younger, papillary thyroid cancer patients with lateral neck lymph node metastases. Thyroid. 2014;24:1088–1095. doi: 10.1089/thy.2013.0465. - DOI - PubMed

LinkOut - more resources