Catalytic ozonation of azo dye active brilliant red X-3B in water with natural mineral brucite

Dong, Yuming; He, Kun; Zhao, Bo; Yin, Ying; Liu, Yin; Zhang, Aimin

doi:10.1016/j.catcom.2007.01.016

Cited by 78 publications

(37 citation statements)

References 30 publications

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“…Natural brucite is a kind of inexpensive and environment friendly alkali mineral. Recently, we have used natural brucite as ozonation catalyst for the degradation of organic dye [27]. Herein, the calcined product of natural brucite, magnesia has been successfully used for the catalytic ozonation of nitrobenzene and aniline.…”

Section: Introductionmentioning

confidence: 99%

Catalytic Degradation of Nitrobenzene and Aniline in Presence of Ozone by Magnesia from Natural Mineral

Dong

Liu

et al. 2007

Catal Lett

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In this work, magnesia from natural brucite mineral has been used firstly for catalytic degradation of nitrobenzene and aniline in presence of ozone. Compared with single ozonation, the catalytic ozonation accelerated markedly the degradation of nitrobenzene and aniline. The influences of hydroxyl radical scavengers, pH values, and reaction temperatures on degradation were investigated. It was found that the essential of catalysis was the homogeneous catalysis of hydroxyl ions in water, which accelerated the generation of hydroxyl radicals. As a catalyst, magnesia from natural brucite has supplied an economical and feasible choice for catalytic ozonation of nitrobenzene and aniline in industrial wastewater.

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Section: Introductionmentioning

confidence: 99%

Catalytic Degradation of Nitrobenzene and Aniline in Presence of Ozone by Magnesia from Natural Mineral

Dong

Liu

et al. 2007

Catal Lett

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“…According to some authors [5][6][7][8] ozonation process can be significantly improved by use of different catalysts. It has been emphasized that catalytic ozonation comparing with single ozonation allow the oxidation of recalcitrant compounds and lead to a considerable chemical oxygen demand (COD) and total organic carbon (TOC) reduction.…”

Section: Introductionmentioning

confidence: 99%

Catalytic Ozonation of Acid Red 88 from Aqueous Solutions

et al. 2008

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“…About 10%-15% of the dye is lost during the dyeing process, which causes threat to environment [1]. Dyeing wastewater is known to contain strong color, high pH, temperature and COD, and to have low biodegradability [2].…”

Section: Introductionmentioning

confidence: 99%

Role of schorl’s electrostatic field in discoloration of methyl orange wastewater using schorl as catalyst in the presence of H2O2

Prasad

et al. 2010

Sci. China Technol. Sci.

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Dyeing wastewater containing methyl orange (MO) could be effectively discolored by schorl-catalyzed Fenton-like system. Experimental results indicated that the MO discoloration ratios could be increased by increasing schorl dosage, temperature, initial H 2 O 2 concentration, and by decreasing solution pH. When the raw schorl and the schorl samples sintered at 750°C, 850°C, 950°C and 1050°C were used as catalyst in Fenton-like system, the MO discoloration ratios obtained were 82%, 31%, 30%, 31% and 7%, respectively. XRD results showed that samples sintered at 750°C, 850°C and 950°C had no change in structure and still held the crystal structure of schorl and quartz, but, the content of schorl crystal decreased. Whereas, schorl crystal completely disappeared in the sample sintered at 1050°C and two new crystal phases of hematite and spinel were formed, which resulted in disappearance of the spontaneous 'electrostatic poles'. Hence, it was inferred that the electrostatic field of schorl crystal could enhance the MO discoloration by schorl-catalyzed Fenton-like reaction. schorl, methyl orange, discoloration, Fenton-like system, polarization Citation: Xu H Y, Prasad M, Qi S Y, et al. Role of schorl's electrostatic field in discoloration of methyl orange wastewater using schorl as catalyst in the presence of H 2 O 2 .

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Catalytic ozonation of azo dye active brilliant red X-3B in water with natural mineral brucite

Cited by 78 publications

References 30 publications

Catalytic Degradation of Nitrobenzene and Aniline in Presence of Ozone by Magnesia from Natural Mineral

Catalytic Degradation of Nitrobenzene and Aniline in Presence of Ozone by Magnesia from Natural Mineral

Catalytic Ozonation of Acid Red 88 from Aqueous Solutions

Role of schorl’s electrostatic field in discoloration of methyl orange wastewater using schorl as catalyst in the presence of H2O2

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