The Experts below are selected from a list of 282 Experts worldwide ranked by ideXlab platform
Bai Cuiping - One of the best experts on this subject based on the ideXlab platform.
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removal of <B>RhodamineB> B By ozone Based advanced oxidation process
Desalination, 2011Co-Authors: Bai Cuiping, Xiong Xianfeng, Gong Wenqi, Feng Dexin, Xian Mo, Ge Zhongxue, Xu NianAbstract:The oxidation of <B>RhodamineB> B in aqueous solution By conventional ozone process and the advanced ozone-Based oxidation processes was investigated. The reaction conditions such as ozone dosage, initial concentration of the dye and pH in ozone process were optimized. The decolorization rate of <B>RhodamineB> B increased with the ozone dosage But decreased with the initial concentration of <B>RhodamineB> B. Three oxidative processes including UV/ozone, US/ozone and ozone systems were assessed to select the most appropriate oxidative process in terms of <B>RhodamineB> B aqueous solution treatment and special emphasis was laid on the effect of reaction pH in the three methods. It was found that in all the three methods, the acid condition can promote the oxidation process. The UV/ozone process was the Best ozone-Based oxidization process, with the decolorization efficiency of 99.78% and COD removal rate of 47.43% after 15 min treatment. The pseudo-first order kinetics was found to fit all the ozone-Based processes, with regard to the decoloration and degradation reactions. (C) 2011 Elsevier B.V. All rights reserved.
Dietmar Stephan - One of the best experts on this subject based on the ideXlab platform.
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photodegradation of <B>RhodamineB> B in aqueous solution via sio2 tio2 nano spheres
Journal of Photochemistry and Photobiology A-chemistry, 2007Co-Authors: Patrick Wilhelm, Dietmar StephanAbstract:ABstract Titania coated silica spheres (SiO 2 @TiO 2 ) prepared By heterocoagulation of silica and titania nano-particles were investigated as catalyst in the photodegradation of <B>RhodamineB> B (RB) in aqueous solution. The silica spheres were prepared By the well-known StoBer method and titania sol By a hydrolysis–condensation reaction in acidic media. The uncoated and coated particles were characterized By zeta potential measurements, acoustic attenuation spectroscopy and scanning electron microscopy. The degradation of the dye was induced By illuminating the coated spheres in aqueous solution with artificial solar light. The spectral distriBution of the applied light corresponds to the sunlight spectrum on the earth's surface. <B>RhodamineB> B was used as model dye and decomposed completely to colourless end products after illumination. The decrease in concentration of <B>RhodamineB> B was monitored By UV–vis spectroscopy and the total organic carBon (TOC) was determined in order to verify the degradation mechanism descriBed elsewhere.
Xikui Wang - One of the best experts on this subject based on the ideXlab platform.
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Degradation of <B>RhodamineB> B in aqueous solution By using swirling jet-induced cavitation comBined with H2O2.
Journal of Hazardous Materials, 2009Co-Authors: Xikui Wang, Jingang Wang, Chen WangAbstract:ABstract The degradation of <B>RhodamineB> B in aqueous solution By using swirling jet-induced cavitation comBined with H 2 O 2 was investigated. It was found that there is an oBvious synergetic effect Between hydrodynamic cavitation and H 2 O 2 for the degradation of <B>RhodamineB> B. The effects of various operating parameters such as H 2 O 2 dosage, medium pH, solution temperature, fluid pressure and the dye initial concentration on the degradation of <B>RhodamineB> B have Been studied. It was found that the removal of <B>RhodamineB> B in aqueous solution was increased with increasing the addition of H 2 O 2 and the fluid pressure, and the removal of <B>RhodamineB> B was decreased with increasing the medium pH and dye initial concentration. It was also found that the degradation of <B>RhodamineB> B is dependent on the solution temperature. The removal of <B>RhodamineB> B increased with increase of temperature from 30 to 50 °C, But less degradation ratio is oBserved at 60 °C. The degradation kinetics of <B>RhodamineB> B in aqueous solution using swirling jet-induced cavitation comBined with H 2 O 2 under various operational conditions was also investigated. It was found that the degradation of <B>RhodamineB> B follows a pseudo-first-order kinetics.
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Chemical effect of swirling jet-induced cavitation: degradation of <B>RhodamineB> B in aqueous solution.
Ultrasonics Sonochemistry, 2007Co-Authors: Xikui Wang, Jingang Wang, Guoliang LiAbstract:The chemical effect of swirling jet-induced cavitation was investigated with the decomposing reaction of <B>RhodamineB> B in aqueous solution. It was found that <B>RhodamineB> B in aqueous solution can Be degraded with swirling jet-induced cavitation and the degradation can Be descriBed By a pseudo-first-order kinetics. The effects of operating conditions such as pressure, temperature, initial concentration of <B>RhodamineB> B, pH of water on the degradation rate of <B>RhodamineB> B were discussed. It was found that the degradation rate of <B>RhodamineB> B increased with increasing pressure and decreased with increasing initial concentration. It was also found that the degradation of <B>RhodamineB> B was strongly dependent of temperature and pH of aqueous solution. The oxidation efficiency of swirling jet-induced cavitation for <B>RhodamineB> B degradation was discussed and compared with ultrasonic cavitation. The result indicated that the swirling jet-induced cavitation is more energy efficient as compared to sonochemical cavitation.
Xu Nian - One of the best experts on this subject based on the ideXlab platform.
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removal of <B>RhodamineB> B By ozone Based advanced oxidation process
Desalination, 2011Co-Authors: Bai Cuiping, Xiong Xianfeng, Gong Wenqi, Feng Dexin, Xian Mo, Ge Zhongxue, Xu NianAbstract:The oxidation of <B>RhodamineB> B in aqueous solution By conventional ozone process and the advanced ozone-Based oxidation processes was investigated. The reaction conditions such as ozone dosage, initial concentration of the dye and pH in ozone process were optimized. The decolorization rate of <B>RhodamineB> B increased with the ozone dosage But decreased with the initial concentration of <B>RhodamineB> B. Three oxidative processes including UV/ozone, US/ozone and ozone systems were assessed to select the most appropriate oxidative process in terms of <B>RhodamineB> B aqueous solution treatment and special emphasis was laid on the effect of reaction pH in the three methods. It was found that in all the three methods, the acid condition can promote the oxidation process. The UV/ozone process was the Best ozone-Based oxidization process, with the decolorization efficiency of 99.78% and COD removal rate of 47.43% after 15 min treatment. The pseudo-first order kinetics was found to fit all the ozone-Based processes, with regard to the decoloration and degradation reactions. (C) 2011 Elsevier B.V. All rights reserved.
Wu Jin-ming - One of the best experts on this subject based on the ideXlab platform.
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Hydrodynamic Cavitation Process for Degradation of <B>RhodamineB> B
China Water & Wastewater, 2004Co-Authors: Wu Jin-mingAbstract:The orifice plates with various thickness,hole numBers and hole sizes were used as hydrodynamic cavitation generator to study the degradation effect of hydrodynamic cavitation of <B>RhodamineB> B,and the relationship Between the geometry of orifice plate and the treatment effect of cavitation was oBtained.
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Experimental Study of the Decomposition of <B>RhodamineB> B By Hydrodynamic Cavitation
2004Co-Authors: Wu Jin-mingAbstract:Hydrodynamic cavitation is a new technique in wastewater treatment schemes. The decomposition of <B>RhodamineB> B has Been studied on a 220l hydrodynamic cavitation set-up in this paper. The experimental results showed that the <B>RhodamineB> B is decomposed By hydrodynamic cavitation .Some factors of effect i.e. cavitation numBer and inlet pressure are discussed and the decompositional regular is proposed.