Journal of Environmental Science and Health Part A · 2012 · 42 citations · 33 references
Natural SciencesChemical EngineeringEnvironmental EngineeringCatalysisReaction EngineeringWastewater TreatmentCatalytic MaterialsPhotocatalysisPhotochemical KineticsPhotochemistryTextile FinishingWastewater ManagementDyeing ProcessesHeterogeneous PhotocatalysisLangmuir-hinshelwood MechanismLangmuir-hinshelwood ReactionsPhotocatalytic KineticsPhotocatalytic TreatmentPhotocatalytic Water TreatmentPolynomial Regression
Real textile wastewater collected from the cotton dyeing bath of a fabric dyeing and finishing plant was subjected to heterogeneous photocatalysis using Ag(+) doped TiO(2) under UV irradiation in a batch reactor. The photocatalysts were characterized by FESEM, XRD, EDS, FTIR, DRS and BET analyses. The kinetics of the reaction was also evaluated. Colour removal was more than 88%, 94% and 99%, respectively for undiluted, 2 times diluted and 5 times diluted wastewater with Ag(+) doped TiO(2) (2.5 g/L) after UV irradiation for 360 minutes. The COD removal for undiluted, 2 times diluted and 5 times diluted wastewater was 47%, 70% and 92%, respectively under similar conditions. The reaction followed Langmuir-Hinshelwood pseudo first order kinetic model and the data fitted well to polynomial regression analysis.
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