The microbubble technique has drawn great attention for efficient utilization of ozone for advance oxidation processes. Therefore, in this study, microbubble ozonation was investigated to evaluate the removal efficiency and toxicity reduction of benzo[a]pyrene. Compared with conventional macrobubble ozonation, microbubble ozonation produced higher concentrations of hydroxyl radicals and ozone in aqueous solutions, resulting in more efficient and persistent degradation of benzo[a]pyrene. Moreover, microbubble ozonation completely removed the acute toxicity of benzo[a]pyrene to Daphnia magna, whereas the toxicity reduction by macrobubble ozonation was not consistent owing possibly to toxic degradation products. These findings suggest that microbubble ozonation is a promising technique in terms of both chemical degradation and toxicity reduction of organic pollutants.

中文翻译：

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微泡臭氧化增强苯并[a]芘降解和降低毒性

微泡技术因臭氧在高级氧化过程中的有效利用而备受关注。因此，在本研究中，研究了微泡臭氧化以评估苯并 [a] 芘的去除效率和毒性降低。与传统的大气泡臭氧化相比，微气泡臭氧化在水溶液中产生更高浓度的羟基自由基和臭氧，从而更有效和持久地降解苯并[a]芘。此外，微气泡臭氧化完全消除了苯并 [a] 芘对大溞的急性毒性，而由于可能存在有毒降解产物，大气泡臭氧化作用降低的毒性不一致。