MECHANISM OF PEROVSKITE LaBO<sub>3</sub> CATALYZED PEROXYACETIC ACID DEGRADATION OF BISPHENOL A IN WATER

ZHAO Ying; LIU Qingliang; WANG Shuo; SUN Zhiqiang; MA Jun

doi:10.13205/j.hjgc.202312001

Volume 41 Issue 12

Dec. 2023

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ZHAO Ying, LIU Qingliang, WANG Shuo, SUN Zhiqiang, MA Jun. MECHANISM OF PEROVSKITE LaBO3 CATALYZED PEROXYACETIC ACID DEGRADATION OF BISPHENOL A IN WATER[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(12): 1-10. doi: 10.13205/j.hjgc.202312001

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ZHAO Ying, LIU Qingliang, WANG Shuo, SUN Zhiqiang, MA Jun. MECHANISM OF PEROVSKITE LaBO₃ CATALYZED PEROXYACETIC ACID DEGRADATION OF BISPHENOL A IN WATER[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(12): 1-10. doi: 10.13205/j.hjgc.202312001

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MECHANISM OF PEROVSKITE LaBO₃ CATALYZED PEROXYACETIC ACID DEGRADATION OF BISPHENOL A IN WATER

doi: 10.13205/j.hjgc.202312001

1. State Key Laboratory of Urban Water Resources and Water Environment, Harbin Institute of Technology, Harbin 150090, China;
2. Ecological Environment Research Center of the Chinese Academy of Sciences, Beijing 100085, China

Received Date: 2023-09-28
Available Online: 2024-03-08

Abstract

Abstract

To remove endocrine disruptors in water efficiently, perovskite LaBO₃ (B=Fe, Cr, Co) catalyst was synthesized by sol-gel method to catalyze the degradation of bisphenol A (BPA) in water by peracetic acid (PAA). The morphology and microstructure of the catalyst were characterized using TG-DSC, SEM, TEM, XRD, etc. The effect of catalytic PAA removal of BPA under different conditions was studied, and the catalytic PAA reaction mechanism was proposed. The results indicated that LaBO₃ (B=Fe, Cr, Co) was an irregular sphere with varying sizes, smooth surfaces, and aggregation. The specific surface area of LaCoO₃ was 11.89 m²/g. BPA degradation could reach 85% in the LaCoO₃/PAA system, significantly higher than that of LaCrO₃/PAA (14%) and LaFeO₃/PAA (14%) systems. In addition, the LaCoO₃/PAA system also exhibited good degradation efficiency on other pollutants (orange I, sulfamethoxazole, 4-chlorophenol), and had strong anti-interference ability with common inorganic anions and humic acids in water, making LaCoO₃ an environmentally friendly catalyst with promising development prospects. The quenching experiment combined with electron spin resonance spectroscopy revealed that organic radicals were the main active species causing BPA degradation in the LaCoO₃/PAA system. The electron transfer pathway was the secondary oxidation pathway for the catalytic degradation of BPA in the LaCoO₃/PAA system. In addition, the oxidation-reduction reaction between ≡Co^Ⅲ/≡Co^Ⅱ and PAA ensured the continuous generation of radicals and high degradation efficiency. This work can provide new insight into the treatment of endocrine disruptors in water pollution.
- perovskite,
- peroxyacetic acid,
- bisphenol A,
- catalytic degradation,
- radical oxidation

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References(23)

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