2013 Fiscal Year Final Research Report
The Novel Cutting-edge Technologies to Eliminate Refractory Perfluorinated Compounds in Water Environment
| Project/Area Number |
23310057
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Environmental technology/Environmental materials
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| Research Institution | Osaka Sangyo University |
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Principal Investigator |
OZAKI HIROAKI 大阪産業大学, 工学部, 教授 (40135520)
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| Co-Investigator(Kenkyū-buntansha) |
FUJIKAWA Yoko 京都大学, 原子炉実験所, 准教授 (90178145)
SHIRAKAWA Taku 神戸大学, 大学院保健学研究科, 准教授 (30171044)
HAMASAKI Tatsuhide 大阪産業大学, 人間環境学部, 准教授 (50340617)
RABINDRA Giri 大阪産業大学, 新産業研究開発センター, 客員講師 (70568493)
TANIGUCHI Syogo 大阪産業大学, 工学部, 契約助手 (40425054)
TAKANAMI Ryohei 大阪産業大学, 工学部, 契約助手 (00440933)
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| Project Period (FY) |
2011-04-01 – 2014-03-31
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| Keywords | 環境保全技術 / 有機フッ素化合物 / PFOS / PFOA / 低圧逆浸透法 / 電気分解法 / 紫外線分解法 / 間接熱脱着法 |
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| Research Abstract |
This study aimed to develop novel technologies for degrading perfluorinated compounds (PFCs) in wastewater and sludge. Advanced analytical techniques were developed for quantitation of the compounds and their degradation products. Low pressure reverse osmosis membrane filtration was very effective to retain the compounds. Perfluorooctane sulfonate (PFOS), the most refractory compound among the PFCs, was degraded very effectively in wastewater and sludge by electrolysis and indirect thermal desorption method (over 400 oC) respectively. Various kinds of intermediates in water phase were observed during electrolytic degradation of PFOS while low molecular weight PFCs at very low concentrations were detected in gas phase. Photolytic degradation of perfluorooctanoic acid (PFOA) in dilute aqueous solution was greatly enhanced (almost one hundred percent PFOA removal and 70% defluorination ratio) in a novel photo-reactor that utilizes vacuum VUV (185 nm) emitted by low-pressure lamps.
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