Enhanced free-radical generation by shrinking microbubbles using a copper catalyst

被引：153
作者：
Li, Pan [1 ]
Takahashi, Masayoshi [1 ]
Chiba, Kaneo [2 ]
机构：
[1] Natl Inst Adv Ind Sci & Technol, Tsukuba, Ibaraki 3058569, Japan
[2] REO Lab Co LTD, Higashi Matsushima, Miyagi 9810502, Japan
来源：
CHEMOSPHERE | 2009年 / 77卷 / 08期
关键词：
Copper catalyst; Free-radical; Microbubble; Shrinkage; Wastewater treatment; OXIDATION; PHENOL; OZONATION; WATER; OXIDE;
D O I：
10.1016/j.chemosphere.2009.07.062
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
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. (C) 2009 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1157 / 1160
页数：4
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