Journal
NANOSCALE
Volume 5, Issue 22, Pages 11011-11018Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3nr02412a
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Funding
- National Natural Science Foundation of China (NSFC) [21207073]
- Australian Research Council (ARC)
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Iodine radioisotopes are released into the environment by the nuclear industry and medical research institutions using radioactive materials. The I-129 anion is one of the more mobile radioactive species due to a long half-life, and it is a great challenge to design long-term management solutions for such radioactive waste. In this study, a new adsorbent structure with the potential to efficiently remove radioactive iodine anions (I-) from water is devised: silver oxide (Ag2O) nanocrystals firmly anchored on the surface of titanate nanotubes and nanofibers via coherent interfaces between Ag2O and titanate phases. I- anions in fluids can easily access the Ag2O nanocrystals and be efficiently trapped by forming AgI precipitate that firmly attaches to the adsorbent. Due to their one-dimensional morphology, the new adsorbents can be readily dispersed in liquids and easily separated after purification; and the adsorption beds loaded with the adsorbents can permit high flux. This significantly enhances the adsorption efficiency and reduces the separation costs. The proposed structure reveals a new direction in developing efficient adsorbents for the removal of radioactive anions from wastewater.
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