Catalytic ozonation of aqueous phenol over metal-loaded HZSM-5

Amin, Nor Aishah Saidina; Akhtar, Javaid; K., H.

doi:10.2166/wst.2011.313

Cited by 1 publication

(1 citation statement)

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“…In recent few years, metal-loaded zeolites were extensively implied as a catalyst in ozone-assisted processes and were found to be highly efficient [31,32]. Since each type of zeolite may have unique properties and shapes compared to others, it is indeed important to investigate the ozoneassisted processes in the presence of various types of zeolites.…”

Section: Introductionmentioning

confidence: 99%

Application of Attapulgite Clay-Based Fe-Zeolite 5A in UV-Assisted Catalytic Ozonation for the Removal of Ciprofloxacin

Ikhlaq

Javaid

Akram

et al. 2022

Journal of Chemistry

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For the first time, Fe-zeolite 5A (Fe-Z5A) efficacy in the UV-assisted ozonation process to remove ciprofloxacin (CF) in wastewater is investigated. FTIR, SEM, EDX, BET, and the mass transfer process for point of zero charge are used to characterize the catalyst. Furthermore, the synergic process (UV/O3/Fe-Z5A) is compared with O3, O3/UV, and Fe-Z5A/O3 processes. The influence of catalyst dose, hydroxyl radical scavenger, and off-gas ozone released is discussed. The removal efficiency of CF in wastewater (for the synergic process) is compared with a single ozonation process. The results indicate that the synergic process was more efficient than others, with about 73% CF being removed (in 60 minutes) in the synergic process. The results also show that synergic processes produce less off-gas ozone than other processes, suggesting more ozone consumption in the synergic process, and confirmed by the radical scavenger effect and hydrogen peroxide decomposition studies. The Fe-Z5A was found to operate through a hydroxyl mechanism in which Fe worked as an active site that promotes the formation of hydroxyl radicals. Finally, the synergic process was more efficient than the ozonation process in the wastewater matrix. Hence, Fe-Z5A/O3/UV pathway is highly efficient for the degradation of pharmaceuticals in wastewater.

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Section: Introductionmentioning

confidence: 99%