期刊
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
卷 8, 期 5, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jece.2020.104147
关键词
Radioactive iodine; Adsorption; Bio-adsorbent; Anthocyanin; Aqueous
资金
- Japan Advanced Institute of Science and Technology (JAIST), Japan
- Sirindhorn International Institute of Technology (SIIT), Thailand
- National Science and Technology Development Agency (NSTDA), Thailand
To provide an alternative solution for radioactive iodine remediation, mangosteen pericarps, red onion peels, red dragon fruit peels, and passion fruit rinds (anthocyanin-based adsorbents) were successfully employed for iodide (I-) removal from aqueous solution with minimal processing. The adsorption results revealed that 0.5 g/L of mangosteen pericarps and red onion peels removed up to 90 % of 10 mg/L I- within 30 min. For both adsorbents, the experimental and the predicted Langmuir isotherms adsorption capacity (q(max)) were over 70 mg/g. Anthocyanin quantification revealed that the quantity of vacuole pigments coincided with I- adsorption capacity across different adsorbents. O as part of the flavylium cation in anthocyanin, attracted I- via electrostatic force, and the adsorption was controlled by ion-exchange. The computational radial distance was predicted to be similar to 3.28 A. Further characterization by UV-vis spectrometry, FTIR, EDX, XPS, and XAS supported the claim of flavylium cation in anthocyanin as the main I- adsorbing functional group. Thus, the anthocyaninbased materials from agriculture waste can be used sustainably to remove radioactive I- from nuclear power facilities, water treatment plants and for environmental remediation.
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