INFLUENCE MECHANISM OF ACTIVATED CARBON PARTICLE SIZE ON O<sub>3</sub>-AC TREATMENT OF ORGANIC WASTEWATER

DU Minghui; BI Yingying; DONG Li; WANG Yong; SUN Xiaoming

doi:10.13205/j.hjgc.202204004

Volume 40 Issue 4

Apr. 2022

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2022 > 40(4): 22-28

DU Minghui, BI Yingying, DONG Li, WANG Yong, SUN Xiaoming. INFLUENCE MECHANISM OF ACTIVATED CARBON PARTICLE SIZE ON O3-AC TREATMENT OF ORGANIC WASTEWATER[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(4): 22-28. doi: 10.13205/j.hjgc.202204004

Citation:

DU Minghui, BI Yingying, DONG Li, WANG Yong, SUN Xiaoming. INFLUENCE MECHANISM OF ACTIVATED CARBON PARTICLE SIZE ON O₃-AC TREATMENT OF ORGANIC WASTEWATER[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(4): 22-28. doi: 10.13205/j.hjgc.202204004

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INFLUENCE MECHANISM OF ACTIVATED CARBON PARTICLE SIZE ON O₃-AC TREATMENT OF ORGANIC WASTEWATER

doi: 10.13205/j.hjgc.202204004

1. Chinese Research Academy of Environmental Sciences State Environmental Protection Key Laboratory of Ecological Industry, Beijing 100012, China;
2. North China University of Architecture and Civil Engineering, Tangshan 063000, China

Received Date: 2021-05-08
Available Online: 2022-07-06

Abstract

Abstract

Ozone-activated carbon (O₃-AC) technology can remove pollutants from wastewater through the synergistic effect of adsorption and oxidation, with the size of the AC particle being the key influencing factor. Five different particle sizes in the range of 48~1700 μm were prepared and used for O₃-AC treatment of phenol wastewater. The mechanisms of AC particle size effects on pollutant adsorption, oxidation and O₃ mass transfer were investigated by adsorption and oxidation kinetics. Experimental results showed that when the particle size of AC was below 150 μm, the exposure of more microscopic pore channels on the surface of AC increased the adsorption and oxidation rates by 189% and 166%, respectively, compared to AC with particle size above 150 μm; the mass transfer and decomposition rates of AC with particle size between 48~150 μm in O₃ reached 0.57 min^-1 and 0.51 min^-1, respectively; after adding tert-butanol (TBA) to O₃-AC, the COD removal rate decreased by 20% within 40 min. The decomposition of O₃ was related to the catalytic oxidation reaction; after six consecutive O₃-AC experiments using 48~150 μm particle size AC, the COD removal rate was maintained at 95% above, showing a good stability.
- ozone,
- activated carbon,
- partical size,
- organic waste water,
- kinetics

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References(17)

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