Destruction of phenol from wastewater by oxidation with sulfite-oxygen

Kulkarni, Umesh; Dixit, Swati

doi:10.1021/ie00056a037

Cited by 58 publications

(29 citation statements)

References 15 publications

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“…The efficiencies of processes designed to recover phenols from, or to mineralise phenols in aqueous media have been described (Kulkarni and Dixit, 1991;Garcia-Mendieta et al, 2003;Lazarova and Boyadzhieva, 2004). Activated carbon adsorption and solvent extraction processes have been used in processes of phenol recovery, while biological and chemical oxidation treatment methods have been conventionally preferred for the destruction of this type of organic compound.…”

Section: Introductionmentioning

confidence: 99%

A combined photolytic–electrolytic system for the simultaneous recovery of copper and degradation of phenol or 4-chlorophenol in mixed solutions

Chaudhary

Grimes

2008

Chemosphere

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The effects of the presence of copper on the photooxidation of phenol and 4-chlorophenol and of the presence of the phenols on the recovery of copper by electrodeposition are studied in three systems: a photolytic cell in the presence and absence of TiO 2 as a catalyst or H 2 O 2 as an oxidant; an electrolytic cell and a combined photolyticelectrolytic system. The optimum system for the simultaneous removal of copper and destruction of the phenols which overcomes the effects of copper-phenol reactions is a combined system with concentrator electrode technology incorporated into the electrolytic cell. This combined system achieves > 99% removal of copper and destruction of phenol or 4-chlorophenol in an 8 h period.

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Section: Introductionmentioning

confidence: 99%

A combined photolytic–electrolytic system for the simultaneous recovery of copper and degradation of phenol or 4-chlorophenol in mixed solutions

Chaudhary

Grimes

2008

Chemosphere

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“…Kulkarni weight), much higher oxygen partial pressure and the use of an auxiliary oxidant by the authors. The phenol to catalyst ratio (weight basis) in the present study was 0.20 as compared to 0.13 used by Kulkarni and Dixit [11]. The present work used air as an oxidant with a very small oxygen partial pressure (i. e., 0.021 MPa) in comparison to 0.25 MPa O2 partial pressure used in the previous study.…”

Section: Atmospheric Pressure Conditionsmentioning

confidence: 89%

“…The addition of CuSO4 in synthetic waste water containing phenol (100-500 mg/L) gave 100% phenol conversion within an hour at 1108C and 0.45 MPa oxygen partial pressure [11]. Higher removal efficiency was also due to the presence of sodium sulfite, an auxiliary oxidant.…”

Section: Introductionmentioning

confidence: 99%

“…It is evident from the literature that homogeneous and heterogeneous copper based catalysts (either alone or mixed with other transition metal compounds) are quite efficient in removing organic compounds [7,[11][12][13][14][15][16][17][18]. The addition of CuSO4 in synthetic waste water containing phenol (100-500 mg/L) gave 100% phenol conversion within an hour at 1108C and 0.45 MPa oxygen partial pressure [11].…”

Section: Introductionmentioning

confidence: 99%

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Oxidative Phenol Degradation Using Non‐Noble Metal Based Catalysts

Garg

Mishra

Chand

2010

CLEAN Soil Air Water

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Phenol laden waste streams are not considered suitable for conventional biological treatment if phenol is present in amounts higher than 70 mg/L. Catalytic wet air oxidation (CWAO) is one of the potential methods for treating waste streams containing such compounds. The present work investigated the degradation of synthetic wastewater contaminated with phenol (1 g/L) using a CWAO process in the presence of homogenous (CuSO 4 ) and heterogeneous (LaCoO 3 , CuX and CuO-ZnO/CeO 2 ) catalysts. The reaction was conducted at low temperature (908C) and atmospheric pressure, and at moderate operating conditions (T F 1608C and total pressure f0.8 MPa). Among all the tested catalysts, CuSO 4 , LaCoO 3 and CuX were used for WAO reactions performed at atmospheric pressure conditions, whereas the performance of CuO-ZnO/CeO 2 catalyst was tested in above atmospheric pressure studies. At atmospheric conditions, homogeneous CuSO 4 was found to be the best showing ca. 90% phenol degradation and ca. 83% chemical oxygen demand (COD) reduction after a 24 h reaction period. The above atmospheric studies with catalyst showed ca. 82% phenol reduction and 54% COD removal within 3 h reaction time. The effect of pH, catalyst concentration, pressure and temperature are also reported. Finally, the major results are summarized and the recommendations for future work are given.

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“…One of the most promising processes to realize the high efficiency under the mild conditions is a catalytic liquid-phase oxidation, generally denoted as catalytic wet air oxidation (CWAO). Homogeneous catalysts based on copper salts are reported to exhibit effective catalytic oxidation for treating wastewater (Imamura et al, 1982; Kulkarni and Dixit, 1991; Lin et al, 1996); however, the dissolved catalysts must be separated due to the toxicity of copper ions. Therefore, heterogeneous catalysts have received attention, because the additional separation process is not necessary.…”

Section: Introductionmentioning

confidence: 99%

Catalytic Liquid-Phase Oxidation of Phenolic Compounds Using Ceria-Zirconia Based Catalysts

et al. 2018

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Catalytic liquid-phase oxidation using a catalyst and oxygen gas (Catalytic wet air oxidation, CWAO) is one of the most promising technology to remove hazardous organic compounds in wastewater. Up to now, various heterogeneous catalysts have been reported for phenolic compounds decomposition. The CeO2-ZrO2 based catalysts have been recently studied, because CeO2-ZrO2 works as a promoter which supplies active oxygen species from inside the lattice to the active sites. Since it is difficult to dissolve oxygen gas into water, the use of the promoter is effective for realizing the high catalytic activity at moderate conditions. Also, CeO2-ZrO2 shows high resistance for the metal leaching during the catalytic reaction in the liquid-phase. This article reviews the studies of the catalytic liquid-phase oxidation of phenolic compounds using CeO2-ZrO2 based catalysts.

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Destruction of phenol from wastewater by oxidation with sulfite-oxygen

Cited by 58 publications

References 15 publications

A combined photolytic–electrolytic system for the simultaneous recovery of copper and degradation of phenol or 4-chlorophenol in mixed solutions

A combined photolytic–electrolytic system for the simultaneous recovery of copper and degradation of phenol or 4-chlorophenol in mixed solutions

Oxidative Phenol Degradation Using Non‐Noble Metal Based Catalysts

Catalytic Liquid-Phase Oxidation of Phenolic Compounds Using Ceria-Zirconia Based Catalysts

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