Selective Capture of Iodide from Solutions by Microrosette-like 未-Bi2O3

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• 作者：Long Liu ; Wei Liu ; Xiaoliang Zhao ; Daimei Chen ; Rongsheng Cai ; Weiyou Yang ; Sridhar Komarneni ; Dongjiang Yang
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2014
• 出版时间：September 24, 2014
• 年：2014
• 卷：6
• 期：18
• 页码：16082-16090
• 全文大小：538K
• ISSN：1944-8252

文摘

Radioactive iodine isotopes that are produced in nuclear power plants and used in medical research institutes could be a serious threat to the health of many people if accidentally released to the environment because the thyroid gland can absorb and concentrate them from a liquid. For this reason, uptake of iodide anions was investigated on microrosette-like 未-Bi₂O₃ (MR-未-Bi₂O₃). The MR-未-Bi₂O₃ adsorbent showed a very high uptake capacity of 1.44 mmol g^鈥? by forming insoluble Bi₄I₂O₅ phase. The MR-未-Bi₂O₃ also displayed fast uptake kinetics and could be easily separated from a liquid after use because of its novel morphology. In addition, the adsorbent showed excellent selectivity for I鈥?/sup> anions in the presence of large concentrations of competitive anions such as Cl鈥?/sup> and CO₃2鈥?/sup>, and could work in a wide pH range of 4鈥?1. This study led to a new and highly efficient Bi-based adsorbent for iodide capture from solutions.

Keywords:

未-Bi₂O₃; adsorbent; iodide uptake; Bi₄I₂O₅; radioactive waste; selectivity