The degradation and mineralization of catechol using ozonation catalyzed with MgO/GAC composite in a fluidized bed reactor

Moussavi, Gholamreza; Aghapour, Ali Ahmad; Yaghmaeian, Kamyar

doi:10.1016/j.cej.2014.03.059

Cited by 84 publications

(43 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Feeble peak at 1099 cm -1 is attributed by C-O and C-O-C stretching. Fe-O bending was shown at 576 cm -1 on the spectra (Gupta et al 2011a, b;Moussavi et al 2014). Comparing the FTIR spectra between new catalyst and used catalyst, an increase intensity of -OH band can be observed, which suggested the generation of hydroxyl radical during the ozonation reaction.…”

Section: Characterization Of Catalystmentioning

confidence: 94%

Fe3O4/multi-walled carbon nanotubes as an efficient catalyst for catalytic ozonation of p-hydroxybenzoic acid

Bai

Yang

Wang

2015

Int. J. Environ. Sci. Technol.

View full text Add to dashboard Cite

Fe 3 O 4 /multi-walled carbon nanotubes were prepared, characterized and used as a nanocatalyst for ozonation of p-hydroxybenzoic acid. The stability and reusability of the catalyst was evaluated. Characterization techniques including X-ray diffraction, Fourier transform infrared absorption spectroscopy, scanning electron microscope, high-resolution transmission electron microscopy and physical property measurement were used to analyze the reason for the decrease in catalyst activity. The addition of t-butanol and bicarbonate were used to explore the different process between hydroxyl radicals and ozone. The experimental results showed that the catalytic ozonation could significantly increase the degradation and mineralization of p-hydroxybenzoic acid. The initial pH value was a crucial factor influencing ozone decomposition and the surface property of catalyst or organic pollutant. The degradation of p-hydroxybenzoic acid increased by 32 % in catalyzed ozonation compared to single ozonation after 5 min reaction with unadjusted pH (about 5.4). In batch experiments, the removal efficiency of p-hydroxybenzoic acid and total organic carbon decreased 36.1 and 6.8 % after six run times. Bicarbonate significantly inhibited the mineralization of p-HBA, but it had almost no influence on the catalytic degradation of p-hydroxybenzoic acid. A possible pathway for p-hydroxybenzoic acid degradation was tentatively proposed.

show abstract

Section: Characterization Of Catalystmentioning

confidence: 94%

Fe3O4/multi-walled carbon nanotubes as an efficient catalyst for catalytic ozonation of p-hydroxybenzoic acid

Bai

Yang

Wang

2015

Int. J. Environ. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…Mg/Al 2 O 3 exhibited a strong absorption centered at 200 nm and a wider low-intensity absorption profile at 220-380 nm. The large initial absorption peak is associated with micro-aggregates from highly dispersed Mg 2+ on the Al 2 O 3 surface and the lower broad profile due to the Al 2 O 3 substrate [12]. Ce/Al 2 O 3 had a broad 200-380 nm absorption profile with a peak at 260 nm, which can be associated with overlapping transitional charge transfers that occur between O 2− → Ce 4+ [39].…”

Section: Introductionmentioning

confidence: 99%

Comparison of Efficiencies and Mechanisms of Catalytic Ozonation of Recalcitrant Petroleum Refinery Wastewater by Ce, Mg, and Ce-Mg Oxides Loaded Al2O3

Chen

Yoza

et al. 2017

Catalysts

View full text Add to dashboard Cite

Abstract:The use of catalytic ozonation processes (COPs) for the advanced treatment of recalcitrant petroleum refinery wastewater (RPRW) is rapidly expanding. In this study, magnesium (Mg), cerium (Ce), and Mg-Ce oxide-loaded alumina (Al 2 O 3 ) were developed as cost efficient catalysts for ozonation treatment of RPRW, having performance metrics that meet new discharge standards. Interactions between the metal oxides and the Al 2 O 3 support influence the catalytic properties, as well as the efficiency and mechanism. Mg-Ce/Al 2 O 3 (Mg-Ce/Al 2 O 3 -COP) reduced the chemical oxygen demand by 4.7%, 4.1%, 6.0%, and 17.5% relative to Mg/Al 2 O 3 -COP, Ce/Al 2 O 3 -COP, Al 2 O 3 -COP, and single ozonation, respectively. The loaded composite metal oxides significantly increased the hydroxyl radical-mediated oxidation. Surface hydroxyl groups (-OHs) are the dominant catalytic active sites on Al 2 O 3 . These active surface -OHs along with the deposited metal oxides (Mg 2+ and/or Ce 4+ ) increased the catalytic activity. The Mg-Ce/Al 2 O 3 catalyst can be economically produced, has high efficiency, and is stable under acidic and alkaline conditions.

show abstract

“…For these reasons, several technologies have been investigated for the removal of catechol from wastewater and aqueous solutions, including biological methods [11,12], adsorption [13,14], ozonation process [15,16], advanced photo-oxidation process [17] and Fenton and photo-Fenton [9,18].…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Electrochemical treatment of aqueous solutions of catechol by various electrochemical advanced oxidation processes: Effect of the process and of operating parameters

Ltaïef

D’Angelo

Ammar

et al. 2017

Journal of Electroanalytical Chemistry

View full text Add to dashboard Cite

The degradation and mineralization of catechol using ozonation catalyzed with MgO/GAC composite in a fluidized bed reactor

Cited by 84 publications

References 29 publications

Fe3O4/multi-walled carbon nanotubes as an efficient catalyst for catalytic ozonation of p-hydroxybenzoic acid

Fe3O4/multi-walled carbon nanotubes as an efficient catalyst for catalytic ozonation of p-hydroxybenzoic acid

Comparison of Efficiencies and Mechanisms of Catalytic Ozonation of Recalcitrant Petroleum Refinery Wastewater by Ce, Mg, and Ce-Mg Oxides Loaded Al2O3

Electrochemical treatment of aqueous solutions of catechol by various electrochemical advanced oxidation processes: Effect of the process and of operating parameters

Contact Info

Product

Resources

About