[Photo-chemical decomposition of perfluorooctanoic acids in aqueous periodate]
Cao, MH; Wang, BB; Zhu, HD; Tan, ZJ; Zeng, YS; Wang, LL; Yuan, SH; Chen, J
| HERO ID | 1582020 |
|---|---|
| In Press | No |
| Year | 2011 |
| Title | [Photo-chemical decomposition of perfluorooctanoic acids in aqueous periodate] |
| Authors | Cao, MH; Wang, BB; Zhu, HD; Tan, ZJ; Zeng, YS; Wang, LL; Yuan, SH; Chen, J |
| Journal | Huanjing Kexue / Chinese Journal of Environmental Science |
| Volume | 32 |
| Issue | 1 |
| Page Numbers | 130-134 |
| Abstract | The influence of reaction atmosphere and TiO2 on photochemical decomposition of perfluorooctanoic acid (PFOA) in aqueous periodate was investigated using a type of low-pressure mercury lamps emitted at 254 nm. PFOA photolysis was slight with 254 nm light irradiation under nitrogen, whereas significant decomposition PFOA obtained with the addition of IO4-. In addition, oxygen restrained photochemical decomposition of PFOA. In UV/TiO2/IO4- system, PFOA degradation ratio was 54%, 15% lower than that for UV/IO4- system. *OH radicals generated from UV/TiO2 system exhausted a lot of IO4-, resulting in lower degree of IO3* production. IO3* was high reactive radical which great excitated PFOA decomposition. The accumulation of short-chain perfluorocarbonxylic acids (PFCAs) as products were identified with HPLC/MS. PFCAs bearing shorter perfluoroalkyl groups were formed in a stepwise way from PFCAs that bear longer perfluoroalkyl groups. |
| Pmid | 21404676 |
| Is Certified Translation | No |
| Dupe Override | No |
| Is Public | Yes |
| Language Text | Chinese |