Sekiguchi Kazuhiko, Kudo Takahisa, Sankoda Kenshi
Graduate School of Science and Engineering, Saitama University, 255 Shimo-Okubo, Sakura, Saitama 338-8570, Japan.
Graduate School of Science and Engineering, Saitama University, 255 Shimo-Okubo, Sakura, Saitama 338-8570, Japan.
Ultrason Sonochem. 2017 Nov;39:87-92. doi: 10.1016/j.ultsonch.2017.04.002. Epub 2017 Apr 4.
Perfluorochemicals (PFCs), which are common in the aquatic environment, are toxic substances that have high chemical and heat resistance because of their strong C-F bonds. We investigated the effect of ultrasonication and short-wavelength UV irradiation on the degradation of perfluorooctane, perfluoropropionic acid, and perfluorooctanoic acid, which are examples of hydrophobic, hydrophilic, and intermediate PFCs, respectively. The results confirmed that ultrasonication was more effective for decomposing hydrophobic PFCs and UV irradiation was more effective for decomposing hydrophilic PFCs. Therefore, defluorination of the degradation intermediates was improved by a combination of ultrasonication and UV irradiation. Our results can be applied to the decomposition treatment of PFCs that have various levels of water solubility in the aquatic environment.
全氟化合物（PFCs）在水生环境中很常见，由于其强大的碳氟键，它们是具有高化学稳定性和耐热性的有毒物质。我们研究了超声处理和短波长紫外线照射对全氟辛烷、全氟丙酸和全氟辛酸降解的影响，它们分别是疏水性、亲水性和中间型全氟化合物的示例。结果证实，超声处理对分解疏水性全氟化合物更有效，紫外线照射对分解亲水性全氟化合物更有效。因此，超声处理和紫外线照射相结合可提高降解中间体的脱氟效果。我们的结果可应用于对水生环境中具有不同水溶性水平的全氟化合物的分解处理。
