The performance of the electrocoagulation treatment of synthetic food dye waste industry was studied using iron anode. The influence of several parameters as electrolysis current, chloride concentration, electrolysis time and pH was investigated. In order to verify these factors and their impact on the discoloration efficiency, an experimental design model was established. The mathematical model was created using a rotatable, uniform and central composite design. This model described the color removal efficiency and the energy consumption according to the studied parameters. The graphical representation of the model according to the parameters allowed us to define optimal treatment conditions. The optimal values of electrolysis current, chloride concentration, electrolysis time and pH were respectively 14.4 mA/cm 2 , 5.76 g/L, 39 mn and 7. 94.52% of color removal efficiency is achieved with an energy consumption of 3.90 KWh/m 3 .
The discoloration of Carmoisine at an initial concentration of 1 g/L, by the Fenton process (Fe2+/ H2O2) has been studied. The efficiency of this process in the discoloration of Carmoisine, as well as the influence of the reaction parameters, was discussed. The effects of initial pH, Fe2+ and H2O2 concentrations, and treatment duration on the discoloration kinetic were evaluated. Our results showed that the best discoloration efficiency has reached 94 % and was achieved in 20 minutes of treatment with 3.57 mmol/L Fe2+, 194.1 mmol/L H2O2, at pH = 3. The discoloration kinetics of the carmoisine followed the BMG model.
The discoloration of Carmoisine at an initial concentration of 1 g/L, by the Fenton process (Fe2+/ H2O2) has been studied. The efficiency of this process in the discoloration of Carmoisine, as well as the influence of the reaction parameters, was discussed. The effects of initial pH, Fe2+ and H2O2 concentrations, and treatment duration on the discoloration kinetic were evaluated. Our results showed that the best discoloration efficiency has reached 94 % and was achieved in 20 minutes of treatment with 3.57 mmol/L Fe2+, 194.1 mmol/L H2O2, at pH = 3. The discoloration kinetics of the carmoisine followed the BMG model.
Clinical reasoning teaching is an approach educational method based on learning and contextualized and synthesis education. The aim of this study was to determine the value of clinical reasoning teaching sessions, from the perspective of third year medical students using a self-administered questionnaire. One group of ten students participated in this study. They had clinical case sessions during three weeks. An anonymous evaluation self-administered questionnaire was submitted to the students at the end of the period. The average scores given by students for the items “quality of education”, “atmosphere”, “interest in teaching sessions” and “acquisition of new clinical knowledge” were greater than 7/10. All students opted for clinical reasoning teaching as the preferred teaching method for optimal memorization and have found a real contribution of reasoning teaching in the management of relationship with the patient. Clinical reasoning teaching session appears to be widely desired by medical students.
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