钛酸钡压电臭氧化降解水中的硝基苯

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Abstract The single ozone process is difficult to degrade refractory pollutants. Although the electrolysis ozonation process has been proven to effectively degrade and mineralize refractory organic pollutants, it is limited by electrode materials and mass transfer. The piezoelectric ozonation (PE-O₃) process was proposed by combined the ozone (O₃) process with the piezoelectric (PE) process. The PE-O₃ process showed a significant synergistic effect (the synergy index=5.04) on the degradation of nitrobenzene (NB). Besides, the degradation ratio of NB was 85.37% in PE-O₃ process within 15min, and the reaction conformed to pseudo first order (k=0.1256min^-1). The TOC removal ratio was 74.06% in PE-O₃ process within 120min. As the rotation speed increased, the reaction rate increased. However, the reaction rate constant could reach 0.1446min^-1 when the rotation speed increased to 1500r/min. The reaction rate increased with the increase of BT and O₃ concentration in PE-O₃ process, but the increasing trend slowed down after a certain degree. Moreover, the degradation rate of NB increased with the increase of pH value. When the pH value is 9.0, the degradation rate of NB in the system reached 80% after 15min. Notably, the ^·OH produced during the reaction is the main active species to degrade NB.

Key words： barium titanate piezoelectric ozonation nitrobenzene piezoelectricity ozone

Received: 25 March 2021

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X52

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	ZHUANG Wei
	YANG Jing
	GONG Bing-rou
	ZHENG Ying
	ZHAO Chun

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ZHUANG Wei,YANG Jing,GONG Bing-rou等. Degradation of nitrobenzene from water by piezoelectric ozonation of barium titanate[J]. CHINA ENVIRONMENTAL SCIENCECE, 2021, 41(10): 4654-4661.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2021/V41/I10/4654

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