| Autor: |
El Hanafi N; Laboratoire des Matériaux et Développement Durable (MDD), Faculté des Sciences et des Sciences Appliquées, Université de Bouira, Bouira, Algeria., Zaabar A; Laboratoire des Matériaux et Développement Durable (MDD), Faculté des Sciences et des Sciences Appliquées, Université de Bouira, Bouira, Algeria.; Laboratoire d'Electrochimie, Corrosion et de Valorisation Energétique (LECVE), Faculté de Technologie, Université de Bejaia, Bejaia, Algeria., Aoudjit F; Laboratoire des Matériaux et Développement Durable (MDD), Faculté des Sciences et des Sciences Appliquées, Université de Bouira, Bouira, Algeria., Lounici H; Laboratoire des Matériaux et Développement Durable (MDD), Faculté des Sciences et des Sciences Appliquées, Université de Bouira, Bouira, Algeria. |
| Abstrakt: |
The present work deals with the optimization of basic fuchsin dye removal from an aqueous solution using the ultraviolet UV/H 2 O 2 process. Response Surface Modeling (RSM) based on Box-Behnken experimental design (BBD) was applied as a tool for the optimization of operating conditions such as initial dye concentration (10-50 ppm), hydrogen peroxide dosage (H 2 O 2 ) (10-20 mM/L) and irradiation time (60-180 min), at pH = 7.4 under ultra-violet irradiation (254 nm and 25 W intensity). Chemical oxygen demand (COD abatement) was used as a response variable. The Box-Behnken Design can be employed to develop a mathematical model for predicting UV/H 2 O 2 performance for COD abatement. COD abatement is sensitive to the concentration of hydrogen peroxide and irradiation time. Statistical analyses indicate a high correlation between observed and predicted values (R 2 > 0.98). In the BBD predictions, the optimal conditions in the UV/H 2 O 2 process for removing 99.3% of COD were found to be low levels of pollutant concentration (10 ppm), a high concentration of hydrogen peroxide dosage (20 mM/L), and an irradiation time of 80 min. |
