Results 231 to 240 of about 3,377 (277)

Catalytic ozonation of reverse osmosis membrane concentrates by catalytic ozonation: Properties and mechanisms

Water Environment Research
AbstractNi‐Mn@KL ozone catalyst was prepared for the efficient treatment of reverse osmosis membrane concentrates. The working conditions and reaction mechanism of the ozone‐catalyzed oxidation by Ni‐Mn@KL were systematically studied. Then, a comprehensive CRITIC weighting–coupling coordination evaluation model was established.
Wenquan Sun, Yueqian Cheng, Zhiqiang Xiao, Jun Zhou, Kinjal J. Shah, Yongjun Sun   +5 more
openaire   +2 more sources

Catalytic decomposition of ozone in air

Journal of Environmental Science and Health . Part A: Environmental Science and Engineering and Toxicology, 1997
Abstract The catalytic decomposition of ozone was investigated by using a tubular fixed‐bed reactor. The performance tests and reaction kinetic studies were conducted for two catalysts, i.e., MnO2 and Pt/γ ‐Al2O3 (symbolized as Dash‐220). The experiments were carried out at various constant reaction temperatures (288–338 K) and space velocities (24,000
C.Y. Chang, W.T. Tsai, L. Cheng, C.Y. Chiu, W.H. Huang, Y.H. Yu, H.T. Liou, Y. Ku, J.N. Chen   +8 more
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The investigation of catalytic ozonation and integrated catalytic ozonation/biological processes for the removal of phenol from saline wastewaters

Journal of Hazardous Materials, 2009
The effectiveness of the catalytic ozonation process (COP) with a GAC catalyst was assessed based on the degradation and COD removal of phenol from the saline wastewater, as compared with the single ozonation process (SOP). The COP attained a much higher level of phenol degradation compared to the SOP.
Gholamreza, Moussavi, Ali, Khavanin, Rahimeh, Alizadeh   +2 more
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Non-catalytic and catalytic ozonation of simple halohydrins in water

Journal of Environmental Chemical Engineering, 2019
Abstract This study compares degradation of two hazardous halohydrins, namely 2,3-dibromopropan-1-ol (2,3-DBP) and 1,3-dichloro-2-propanol (1,3-DCP) by non-catalytic ozonation in acidic, neutral and basic water and catalytic ozonation with Co loaded on Fe prepared by (i) co-precipitation (Co-ppt) and (ii) a simple physical mixing (Mixed) method.
Asogan N. Gounden, Sooboo Singh, Sreekantha B. Jonnalagadda   +2 more
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Study on Catalyst for Catalytic Ozonation to Leachate and Catalytic Process

Advanced Materials Research, 2014
Five kinds of catalyst were prepared with Chromium, cadmium, cobalt, copper, nickel loading on the γ–Al2O3. Catalyst loading rate, effects to the ozone suction rates and water quality change situation of catalytic ozonation to leachate were studied. It can be found that when the mO3/mCOD equaled 0.11, 0.15 and 0.26 separately, and mCatalyst/mCOD fixed ...
Bao Jun Jiang, Zhu Jun Tian, Jin Ming Jiang   +2 more
openaire   +1 more source

Degradation of Malathion and Parathion by Ozonation, Photolytic Ozonation, and Heterogeneous Catalytic Ozonation Processes

CLEAN – Soil, Air, Water, 2011
AbstractThe oxidation of organophosphorus pesticides (OPPs), such as malathion and parathion, in aqueous solution was studied using conventional ozonation (O3), photolytic ozonation (O3/UV, O3/UV/H2O2), and heterogeneous catalytic ozonation (O3/TiO2/UV) processes.
Beduk, Fatma, Aydin, Mehmet Emin, Ozcan, Senar   +2 more
openaire   +1 more source

MINERALIZATION OF SALICYLIC ACID IN WATER BY CATALYTIC OZONATION

Environmental Engineering and Management Journal, 2016
The influence of key process parameters of homogenous catalytic ozonation using ferrous or manganese catalysts on the mineralization rate of salicylic acid (SA), model pharmaceutical pollutant, in water was investigated. In order to assess the combined influence and interactions of studied process parameters as well, the empirical/statistical approach ...
Koričić, Kresimir, Kušić, Hrvoje, Koprivanac, Natalija, Papić, Sanja   +3 more
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Study on Treatment of Polyvinyl Alcohol in Water by Ozone Catalytic Ozonation

Advanced Materials Research, 2013
The paper has studied the degradation effect of the polyvinyl alcohol in the Ozone catalytic oxidation oxygenated water, include three kind of catalyst of Fe2+, Mn2+, Cu2+. The results as below, the degradation effect of the polyvinyl alcohol by Ozone catalytic oxidation is higher than ozone alone obviously, and it is related with the concentration of ...
Wan Chun Tan, Xue Bing Lin, Mi Zhou, Chen Xue Yu, Yun Bo Wang   +4 more
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Catalytic ozonation—Effect of carbon contaminants on the process of ozone decomposition

Applied Catalysis B: Environmental, 2013
Abstract Decomposition of ozone into hydroxyl radicals is one of the most frequently discussed hypotheses of the heterogeneous catalytic ozonation mechanism. Estimation of catalytic activity of solid catalysts in the reaction requires the reference system (without the catalyst) with the same pH in which spontaneous ozone decomposition will occur ...
Jacek Nawrocki, Lilla Fijołek
openaire   +1 more source

Study of the Catalytic Ozonation of Humic Substances in Water and Their Ozonation Byproducts

Ozone: Science & Engineering, 1996
Abstract It is shown that using transition metals, especially Mn(II) and Ag(I), during ozonation of humic substances in water allows important reductions in the content of organic matter. Characterization of the organic compounds resulting from ozonation was made by concentrating the sample through liquid-liquid extraction or derivation with PFBOA.HCl,
R. Gracia, J.L. Aragües, J.L. Ovelleiro
openaire   +1 more source