Performance of various catalysts on treatment of refractory pollutants in industrial wastewater by catalytic wet air oxidation: A review

Sushma, .; Kumari, Manjari; Saroha, Anil K.

doi:10.1016/j.jenvman.2018.09.003

Cited by 136 publications

(38 citation statements)

References 227 publications

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“…In the absence of ozone, 1,4-dioxane would be removed by adsorption onto the solid surface, because the formation of free radicals at room temperature is negligible [53]. In fact, CuO is an effective catalyst for the degradation of organic compounds by wet catalytic oxidation via a radical reaction mechanism [54], but these reactions only occur at high temperature (200 -325 o C) and pressure (5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15) in the presence of oxygen/air [55].…”

Section: Catalyzed Ozonation Of 14-dioxane With Cuomentioning

confidence: 99%

Treatment of aqueous solutions of 1,4-dioxane by ozonation and catalytic ozonation with copper oxide (CuO)

Scaratti

Basso

Landers

et al. 2018

Environmental Technology

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In this study, treatment for the removal of 1,4-dioxane by ozone and by catalytic ozonation using CuO as the catalyst was investigated. While the removal of 1,4-dioxane was small (20%) and mineralization negligible after 6 h of ozonation treatment, the removals of 1,4-dioxane and total organic carbon increased by factors of 10.35 and 81.25, respectively, after catalytic ozonation in the presence of CuO. The mineralization during catalytic ozonation was favored at pH 10 (94.91 min -1 ), although it proceeded even at pH 3 (54.41 min -1 ). The CuO catalyst decreased the equilibrium concentration of soluble ozone and favored its decomposition to reactive oxidative species. Radical scavenging experiments demonstrated that superoxide radicals were the main species responsible for the degradation of 1,4-dioxane. Further scavenging experiments with phosphate confirmed the presence of Lewis active sites on the surface of CuO, which were responsible for the adsorption and decomposition of ozone. The reaction mechanism proceeded through the formation of ethylene glycol diformate, which quickly hydrolyzed to ethylene glycol and formic acid as intermediate products. The stability of CuO indicated weak copper leaching and high catalytic activity for five recycling cycles. The toxicity of the water, assessed by Vibrio fischeri bioluminescence assays, remained the same (low toxicity) after catalytic ozonation while it increased after treatment with ozonation alone.

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Section: Catalyzed Ozonation Of 14-dioxane With Cuomentioning

confidence: 99%

Treatment of aqueous solutions of 1,4-dioxane by ozonation and catalytic ozonation with copper oxide (CuO)

Scaratti

Basso

Landers

et al. 2018

Environmental Technology

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“…Chemical oxidation using an oxidizing agent (ozone or hydrogen peroxide) was also demonstrated to decompose cresol effectively, but this requires strong, constant input of hazardous additives [3,4,7]. Liquid-phase oxidation with oxygen gas over catalysts (generally denoted as "catalytic wet-air oxidation") is an effective method for cresol removal employing a simple, sustainable, and environmentally friendly technique [4,15]. According to a previous study, complete p-cresol removal was realized with an Ag/Al 2 O 3 -ZrO 2 catalyst at a temperature of 160°C and under 1.6 MPa pressure [16].…”

Section: Introductionmentioning

confidence: 99%

Effective p-cresol removal through catalytic liquid-phase oxidation under moderate conditions using Pt/CeO₂-ZrO₂-SnO₂/SBA-16 as a catalyst

Supandi

Nunotani

Imanaka

2020

Journal of Asian Ceramic Societies

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“…Organic dyes (e.g., rhodamine B (RhB)) are majorly included in the industrial effluent, which impose a potential threat to our health and survival due to their high water solubility, chemical stability, non-biodegradability and carcinogenicity. In recent years, semiconductor-based photocatalysis has gained increasing interest in water remediation [1][2][3][4]. This technology stands out due to its capability of utilizing solar radiation to decompose the harmful organic dyes.…”

Section: Introductionmentioning

confidence: 99%

Construction of 2D/0D/2D face-to-face contact g-C3N4@Au@Bi4Ti3O12 heterojunction photocatalysts for promising dye degradation

Gao

Zhao

Zhang

et al. 2020

Preprint

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Herein a new type of 2D/0D/2D face-to-face contact g-C 3 N 4 @Au@Bi 4 Ti 3 O 12 heterojunction photocatalysts have been developed. The ternary composite photocatalysts are constructed by coupling Bi 4 Ti 3 O 12 nanosheets with g-C 3 N 4 nanosheets face-to-face and sandwiching Au nanoparticles between Bi 4 Ti 3 O 12 and g-C 3 N 4 nanosheets. The as-prepared g-C 3 N 4 @Au@Bi 4 Ti 3 O 12 composite photocatalysts were systematically investigated by various characterization techniques including XRD, UV–vis DRS, FTIR, SEM, TEM and XPS. The degradation experiments were carried out by removing rhodamine B (RhB) from water under simulated sunlight. It is found that the g-C 3 N 4 @Au@Bi 4 Ti 3 O 12 composite photocatalysts exhibit much enhanced photodegradation performance when compared with bare Bi 4 Ti 3 O 12 and g-C 3 N 4 nanosheets, and moreover they exhibit excellent photocatalytic stability in recycling dye degradation. The underlying photodegradation mechanism of the g-C 3 N 4 @Au@Bi 4 Ti 3 O 12 composite photocatalysts was systematically investigated and discussed.

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Performance of various catalysts on treatment of refractory pollutants in industrial wastewater by catalytic wet air oxidation: A review

Cited by 136 publications

References 227 publications

Treatment of aqueous solutions of 1,4-dioxane by ozonation and catalytic ozonation with copper oxide (CuO)

Treatment of aqueous solutions of 1,4-dioxane by ozonation and catalytic ozonation with copper oxide (CuO)

Effective p-cresol removal through catalytic liquid-phase oxidation under moderate conditions using Pt/CeO₂-ZrO₂-SnO₂/SBA-16 as a catalyst

Construction of 2D/0D/2D face-to-face contact g-C3N4@Au@Bi4Ti3O12 heterojunction photocatalysts for promising dye degradation

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Performance of various catalysts on treatment of refractory pollutants in industrial wastewater by catalytic wet air oxidation: A review

Cited by 136 publications

References 227 publications

Treatment of aqueous solutions of 1,4-dioxane by ozonation and catalytic ozonation with copper oxide (CuO)

Treatment of aqueous solutions of 1,4-dioxane by ozonation and catalytic ozonation with copper oxide (CuO)

Effective p-cresol removal through catalytic liquid-phase oxidation under moderate conditions using Pt/CeO2-ZrO2-SnO2/SBA-16 as a catalyst

Construction of 2D/0D/2D face-to-face contact g-C3N4@Au@Bi4Ti3O12 heterojunction photocatalysts for promising dye degradation

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Effective p-cresol removal through catalytic liquid-phase oxidation under moderate conditions using Pt/CeO₂-ZrO₂-SnO₂/SBA-16 as a catalyst