Synergistic bromothymol blue dye degradation with hydrodynamic cavitation and hydrogen peroxide (HC-H2O2)
Abstract This study assessed the degradation of bromothymol blue in a Venturi device based on a hybrid process that combines hydrodynamic cavitation (HC) and hydrogen peroxide (H2O2). A Rotatable Central Composite Design (RCCD) was used to optimize the following variables: pressure, reaction time and molar ratio of hydrogen peroxide. Degradation efficiencies were evaluated based on Chemical Oxygen Demand (COD) and color removals before and after Venturi treatment. Maximum COD (93.42%) and color (93.28%) removals were observed at 4.0 bar inlet pressure, at a treatment time of 25 minutes and at H2O2/effluent (dye) molar ratio of 30:1. The hydrodynamic cavitation/hydrogen peroxide system has great potential to remove normally recalcitrant organic pollutants.
Main Authors: | Machado,Polyane Ribeiro, Soeira,Thiago Vinícius Ribeiro, Pagan,Fausto de Souza, Malpass,Geoffroy Roger Pointer, Gonçalves,Julio Cesar de Souza Inácio, Ferreira,Deusmaque Carneiro |
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Format: | Digital revista |
Language: | English |
Published: |
Instituto de Pesquisas Ambientais em Bacias Hidrográficas
2020
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Online Access: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1980-993X2020000300316 |
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