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The efficiency of color removal from aqueous Congo Red dye (CR) solution has been investigated in TiO2 suspensions irradiated with artificial UV light. Batch photocatalytic tests were carried out by varying the amount of TiO2 and the irradiation time using the same initial CR concentration. The experimental results indicated that the decolorization rate follows pseudo first-order kinetics with respect to CR concentration. The doses of TiO2 were 0.25, 0.5 and 1.0 g L−1 and the wavelength of incident ultraviolet light was predominantly 254 nm. CR adsorption on the surface of TiO2 is also investigated and described.

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, “ Influence of halide ions on the inhibitive effect of Congo red dye on the corrosion of mild steel in sulphuric acid solution ,” Mater. Chem. Phys , vol. 87 , p. 212 , 2004 . 10.1016/j.matchemphys.2004

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. Method of evaluation of the stabilizing efficiency Evaluation of the stabilizing efficiency of PVC in presence of the investigated thermal stabilizers was carried out by measuring the induction period ( T s ) using Congo-red dye paper for

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stained with 0.1% crystal violet observed for biofilm formation. Congo red agar method [ 18 ]: Congo red agar [37 gm of Brain heart infusion broth (HiMedia)+ 50 gm sucrose (HiMedia)+ 0.8 gm congo red dye +10 gm agar +1 liter water]. CoNS

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