Optimal decolorization efficiency of Reactive Red 239 by UV/TiO2 photocatalytic process coupled with response surface methodology

Liu, Hsuan‐Liang; Chiou, Yun-Ru

doi:10.1016/j.cej.2005.07.012

Cited by 250 publications

(93 citation statements)

References 15 publications

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“…From these results, it can be concluded that the residuals appear to be a random scatter and the model obtained is adequate to descript the relationship between the degradation efficiency and the synthesis parameters for the preparation of MWCNTs-TiO 2 composites. Table 3 displays the analysis of variance of the quadratic model, which is also required to test the significance and adequacy of the model [25,26]. If the model is adequacy, F-value (the ratio between the mean square of the model and the residual error) should be greater than the tabulated value of F-distribution for a certain number of degrees of freedom in the model at a level of significance [20].…”

Section: Model Establishment and Analysismentioning

confidence: 99%

Optimization synthesis of carbon nanotubes-anatase TiO2 composite photocatalyst by response surface methodology for photocatalytic degradation of gaseous styrene

Chen

Huang

et al. 2012

Applied Catalysis B: Environmental

108

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Section: Model Establishment and Analysismentioning

confidence: 99%

Optimization synthesis of carbon nanotubes-anatase TiO2 composite photocatalyst by response surface methodology for photocatalytic degradation of gaseous styrene

Chen

Huang

et al. 2012

Applied Catalysis B: Environmental

108

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“…The radiation source consisted of two 15 W UV tubes (F15T8/GL), positioned on opposite sides of the cabinet interior nearer to top. The details of photochemical reactor are available elsewhere (Divya et al 2009;Liu and Chiou 2005).…”

Section: Irradiation Experimentsmentioning

confidence: 99%

Photocatalytic degradation of azo dye Orange II in aqueous solutions using copper-impregnated titania

Divya

Bansal

Jana

2013

Int. J. Environ. Sci. Technol.

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During dyeing process, industries consume large quantity of water and subsequently produce large volume of wastewater. This wastewater is rich in color and contains different dyes. Orange II is one of them. In this article, metal-impregnated TiO 2 P-25 catalyst was used to enhance the photocatalytic degradation of Orange II dye. Photodegradation percentage was followed spectrophotometrically by the measurements of absorbance at k max = 483 nm. The effect of copper-impregnated TiO 2 P-25 photocatalyst for the degradation of Orange II has been investigated in terms of percentage removal of color, chemical oxygen demand (COD) and total organic carbon (TOC). As such 98 % color removal efficiency, 97 % percentage removal of COD and 89 % percentage removal of TOC was achieved with TiO 2 P-25/Cu catalysts under typical conditions. Copper-impregnated TiO 2 P-25 photocatalyst showed comparatively higher activity than UV/ H 2 O 2 homogeneous photodegradation. The relative electrical energy consumption for photocatalytic degradation was considerably lower with TiO 2 P-25/Cu photocatalyst than that with homogeneous photodegradation. Transmission electron microscopic analysis was used for catalyst characterization.

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“…The regression results, t-values and p-values are given in Table V. Generally, factors having the larger t-value and smaller p-value were considered to be more signifi cant in comparison to the factors whose t-value and p-value were different [32,33]. These results showed that the values of KH 2 PO 4 , starch and soybean meal were highly signifi cant (p < 0.05).…”

Section: Medium Component Effects For Delta-endotoxin Production Usinmentioning

confidence: 51%

Experimental design and Bayesian networks for enhancement of delta-endotoxin production by Bacillus thuringiensis

Ennouri

Ayed

Hassen

et al. 2015

Acta Microbiologica et Immunologica Hungarica

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Bacillus thuringiensis (Bt) is a Gram-positive bacterium. The entomopathogenic activity of Bt is related to the existence of the crystal consisting of protoxins, also called delta-endotoxins. In order to optimize and explain the production of delta-endotoxins of Bacillus thuringiensis kurstaki, we studied seven medium components: soybean meal, starch, KH 2 PO 4 , K 2 HPO 4 , FeSO 4 , MnSO 4 , and MgSO 4 and their relationships with the concentration of delta-endotoxins using an experimental design (Plackett-Burman design) and Bayesian networks modelling. The effects of the ingredients of the culture medium on delta-endotoxins production were estimated. The developed model showed that different medium components are important for the Bacillus thuringiensis fermentation. The most important factors infl uenced the production of delta-endotoxins are FeSO 4 , K 2 HPO 4 , starch and soybean meal. Indeed, it was found that soybean meal, K 2 HPO 4 , KH 2 PO 4 and starch also showed positive effect on the delta-endotoxins production. However, FeSO 4 and MnSO 4 expressed opposite effect. The developed model, based on Bayesian techniques, can automatically learn emerging models in data to serve in the prediction of delta-endotoxins concentrations. The constructed model in the present study implies that experimental design (Plackett-Burman design) joined with Bayesian networks method could be used for identifi cation of effect variables on delta-endotoxins variation.

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Optimal decolorization efficiency of Reactive Red 239 by UV/TiO2 photocatalytic process coupled with response surface methodology

Cited by 250 publications

References 15 publications

Optimization synthesis of carbon nanotubes-anatase TiO2 composite photocatalyst by response surface methodology for photocatalytic degradation of gaseous styrene

Optimization synthesis of carbon nanotubes-anatase TiO2 composite photocatalyst by response surface methodology for photocatalytic degradation of gaseous styrene

Photocatalytic degradation of azo dye Orange II in aqueous solutions using copper-impregnated titania

Experimental design and Bayesian networks for enhancement of delta-endotoxin production by Bacillus thuringiensis

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