Calcium Carbonate/Expanded Graphite As an Efficient Catalyst for Catalytic Ozonation of Ethylenediaminetetraacetic Acid

Jun, He; Song, Wenchao; Gao, Zuoyu; Huang, Xiaohan

doi:10.1089/ees.2019.0496

Cited by 6 publications

(2 citation statements)

References 41 publications

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“…In addition, magnesium and calcium oxides have a variety of advantages, including abundant surface basic sites, high insolubility, low toxicity, environmental friendliness and large specific surface area, which promote their application in heterogeneous catalytic ozonation. [56][57][58][59][60] First, MgO has been applied especially to the removal of COD and phenol from wastewater. The influence of certain factors on the efficiency of the catalytic ozonation also is evaluated, including MgO dosage, solution pH and the coexisting substance in the wastewater.…”

Section: Magnesium and Calcium Oxidesmentioning

confidence: 99%

Advanced Ozonation Processes for Water and Wastewater Treatment

2022

Chemistry in the Environment

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Section: Magnesium and Calcium Oxidesmentioning

confidence: 99%

Advanced Ozonation Processes for Water and Wastewater Treatment

2022

Chemistry in the Environment

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“…Correspondingly, the total amount of active sites that graphite can provide is relatively small [13,14], and the catalytic activity of graphite is usually not high if it is used as a catalyst directly during ozonation [11][12][13]. Therefore, some researchers have pretreated graphite (e.g., ball milling) to increase its specific surface area [13,15], or have directly used high surface area graphite [14], expanded graphite [16][17][18], graphite felt [19], graphene, and its oxides [19] with a larger specific surface area as catalysts or catalyst carriers to improve its catalytic activity.…”

Section: Introductionmentioning

confidence: 99%

Preparation of CeO2 Supported on Graphite Catalyst and Its Catalytic Performance for Diethyl Phthalate Degradation during Ozonation

Tao,

Cui,

Liu

2024

Water

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Catalysts for the efficient catalytic decomposition of ozone to generate reactive free radicals to oxidize pollutants are needed. The graphite-supported CeO2 catalyst was optimally prepared, and its activity in ozonation was evaluated using the degradation of diethyl phthalate (DEP) as an index. The stability of CeO2/graphite catalyst and the influence of operating conditions on its catalytic activity were investigated, and the mechanism of CeO2/graphite catalytic ozonation was analyzed. CeO2/graphite had the highest catalytic activity at a Ce load of 3.5% and a pyrolysis temperature of 400 °C with the DEP degradation efficiency of 75.0% and the total organic carbon (TOC) removal efficiency of 48.3%. No dissolution of active components was found during the repeated use of CeO2/graphite catalyst. The ozone dosage, catalyst dosage, initial pH, and reaction temperature have positive effects on the DEP degradation by CeO2/graphite catalytic ozonation. The presence of tert-butanol significantly inhibits the degradation of DEP at an initial pH of 3.0, 5.8, or 9.0, and the experimental results of the •OH probe compound pCBA indicate that the CeO2/graphite catalyst can efficiently convert ozone into •OH in solution. The DEP degradation in the CeO2/graphite catalytic ozonation mainly depends on the •OH in the bulk solution formed by ozone decomposition.

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