title: Selective capture of iodide from solutions by microrosette-like δ-Bi₂O₃.
abstract: 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 δ-Bi2O3 (MR-δ-Bi2O3). The MR-δ-Bi2O3 adsorbent showed a very high uptake capacity of 1.44 mmol g(-1) by forming insoluble Bi4I2O5 phase. The MR-δ-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(-) anions in the presence of large concentrations of competitive anions such as Cl(-) and CO3(2-), and could work in a wide pH range of 4-11. This study led to a new and highly efficient Bi-based adsorbent for iodide capture from solutions.
authors.affiliation: Collaborative Innovation Center for Marine Biomass Fibers, Materials and Textiles of Shandong Province, College of Chemistry, Chemical and Environmental Engineering, and ‡Library of Qingdao University, Qingdao University , Qingdao 266071, China.
authors.forename: Long
authors.initials: L
authors.lastname: Liu
authors.forename: Wei
authors.initials: W
authors.lastname: Liu
authors.forename: Xiaoliang
authors.initials: X
authors.lastname: Zhao
authors.forename: Daimei
authors.initials: D
authors.lastname: Chen
authors.forename: Rongsheng
authors.initials: R
authors.lastname: Cai
authors.forename: Weiyou
authors.initials: W
authors.lastname: Yang
authors.forename: Sridhar
authors.initials: S
authors.lastname: Komarneni
authors.forename: Dongjiang
authors.initials: D
authors.lastname: Yang
keywords: Bi4I2O5; adsorbent; iodide uptake; radioactive waste; selectivity; δ-Bi2O3