National Institute of Advanced Industrial Science and Technology (AIST), 16-1, Onogawa, Tsukuba, Ibaraki 305-8569, Japan.
Chemosphere. 2009 Nov;77(8):1157-60. doi: 10.1016/j.chemosphere.2009.07.062. Epub 2009 Sep 24.
Free-radicals are generated by collapsing microbubbles in aqueous solutions; however, the concentration is too low to be of practical use. In this study, copper was found to enhance the generation of hydroxyl radicals from collapsing oxygen microbubbles under acidic conditions through electron-spin-resonance spectroscopy analysis. Moreover, the degradation of polyvinyl alcohol, which is not decomposed even by ozone, was also observed during the collapse of the air microbubbles. These findings greatly increase the potential of the microbubble-collapse technique for use in the field of wastewater treatment.
自由基是由水溶液中微泡的坍塌产生的；然而，其浓度太低，无法实际应用。在这项研究中，通过电子自旋共振光谱分析发现，在酸性条件下，铜能够增强氧气微泡坍塌产生羟基自由基。此外，即使在臭氧存在下也不会分解的聚乙烯醇在空气微泡坍塌过程中也被观察到降解。这些发现极大地增加了微泡坍塌技术在废水处理领域的应用潜力。
