https://scholars.lib.ntu.edu.tw/handle/123456789/463332
Title: | Photochemical decomposition of perfluorooctanoic acids in aqueous carbonate solution with UV irradiation | Authors: | Phan Thi, L.-A. Do, H.-T. Lee, Y.-C. Lo, S.-L. SHANG-LIEN LO |
Keywords: | Carbonate radical anion; Perfluorooctane acid; PFOA; Photocatalysis; Photochemical decomposition | Issue Date: | 2013 | Journal Volume: | 221 | Start page/Pages: | 258-263 | Source: | Chemical Engineering Journal | Abstract: | Perfluorooctanoic acid (PFOA) is a persisted organic pollutant and a common contaminant in wastewater because of its widespread occurrence in the environment and its ability to bioaccumulate. Recent studies indicate that PFOA is toxic and carcinogenic to animals such as rats, fishes, monkeys, and even humans. In this study, PFOA was decomposed in water using carbonate radical anions (CO3-) under 254nm UV irradiation at 400W. CO3- is a strong oxidizing and selective radical, however it works efficiently in decomposing PFOA solution. In this study, the results showed that PFOA was decomposed 100% after 12h by using a combination of UV irradiation and CO3-, while under only UV irradiation, 52.1% of PFOA was decomposed. In addition, the decomposition of PFOA with CO3- under UV irradiation was more favorable in a slightly alkaline (pH=8.8) solution and sodium hydrogen carbonate (NaHCO3) 40mM. Moreover, the intermediates included the shorter-chain perfluorinated carboxylic acids and fluorine ions. ? 2013 Elsevier B.V. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/463332 | DOI: | 10.1016/j.cej.2013.01.084 | SDG/Keyword: | Carbonate radical anion; Carbonate solutions; Fluorine ions; Hydrogen carbonates; Perfluorinated carboxylic acids; Perfluorooctanoic acid; PFOA; Photochemical decompositions; UV irradiation; Alkalinity; Carboxylic acids; Decomposition; Health hazards; Negative ions; Photocatalysis; Carbonation |
Appears in Collections: | 環境工程學研究所 |
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