期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 326, 期 -, 页码 69-76出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jhazmat.2016.12.007
关键词
Sodium alginate bead; Azopyridine dye; Silica linkage; Radioisotopes; Detection and removal
资金
- National Research Foundation of Korea (NRF) - Korean government through the Nuclear RD Project [2015M2A7A1000217]
- National Research Foundation of Korea [2015M2A7A1000217] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
We demonstrate a simple method for the visual determination and removal of Co ions using a bead shaped, capturing probe based on hybridized sodium alginate. For Co ions, the designed protocol consisted of three main constituents: an azopyridine-based Co ion-probe for visual detection; sodium alginate as an adsorbent for the Co ion and a bead construct for removal and structure; silica as a linker for the probe and the alginate, leading to a robust structure. When the composite beads were exposed to Co ions, the yellow color of the beads turned to intensive violet and the color intensity was associated with the Co ion concentration. The color variation was quantified using red-green-blue (RGB) color values that were obtained with a scanner and evaluated with Photoshop. The technique achieved both visual recognition with obvious color change of the beads and efficient removal of the radioactive Co-60 ion. The sensing and removal of any radioactive isotope could be achieved with an appropriate sensing probe, to provide a simple and universal platform for remediation. (C) 2016 Elsevier B.V. All rights reserved.
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