The use of nanovermiculite catalyst in the study of removal of the organic load and degradation of atrazine via ozone process in RPB reactor |
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| Authors: | Gabriel N de O Teixeira Arthur M S da Cruz Gisella R L Samanamud Alexandre B França Luzia L R Naves Diego Melo |
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| Institution: | 1. Chemical Engineering and Statistics Department (Research Group Waste Treatment and Management Processes), Federal University of Sao Jo?o Del Rei, S?o Jo?o Del Rei, Brazil;2. Chemical and Materials Engineering, University of Kentucky, Paducah, Kentucky, USA |
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| Abstract: | AbstractThe main objective of this study is the degradation of a synthetic solution of atrazine by a modified vermiculite catalyzed ozonation, in a rotating packed bed (RPB) reactor. A 0.5?L RPB reactor was used to perform the experiments, using a Central Composite Design (CCD) response surface to construct the quadratic model based on the factors: pH, catalyst concentration and reactor rotation frequency. The response variable was the removal of the organic load measured in terms of Chemical Oxygen Demand (COD). After the complete quadratic model was constructed through the response surface, the COD degradation process had an optimal removal of 41% under the following conditions: pH 8.0, rotation of 1150?rpm and catalyst concentration 0.66?g L?1. |
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| Keywords: | Pesticides atrazine optimization RSM modeling AOP ozonation hydroxyl radical heterogeneous catalysis rotating packed bed |
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