This study is aimed at developing an innovative approach for Indigo Carmine dye removal from synthetic solutions by electrodialysis, carried out using ion exchange membranes. The batch electrodialysis system was operated at various current intensities: 0.05, 0.1 and 0.15 A. The pH and conductivity of solutions were measured before and after using electrodialysis process. The colour removal efficiency (CR %) was determined by spectrographic analysis and the energy consumption (EC) was calculated. The obtained results show that the pH of treated solution increases due to the increase in solution conductivity. Moreover, the values of CR % and EC increase when increasing current intensity. The optimal value was obtained at 0.15 A (CR > 97%). The membranes were characterized by Fourier transform infrared spectroscopy, thermogravimetric analysis and scanning electron microscopy.
In this work, a synthetic effluent containing Methylene blue dye has been treated by novel membrane enriched with commercial gooseberry buds extract using a mini-laboratory electrodialysis cell. The electrodialysis system was operated at various time and constant voltage applied at electrodes. Methylene blue removal percentage (CR %) and energy consumption (E.C.) were calculated. The obtained results showed that pH increase in solution and lead to an increase of deprotonated methylene groups, which may favor methylene dichloride complex formation. The values of CR % and E.C. increased with time. The high value of CR % was obtained at 60 min(CR> 89 %). The membranes were characterized by Fourier Transform Infrared Spectroscopy (FTIR) and Environmental Scanning Electron Microscopy (ESEM).
Innovative polymer membranes with and without natural fruit extract (rosehip) are characterized in terms of their ability of treating a solution containing Crystal violet by a three‐compartment laboratory scale electro‐dialysis cell. Electro‐dialysis is performed at different time intervals and using a constant voltage of 15 V. The dye removal percentage (%) and energy consumption are calculated. The highest value of dye removal is obtained for 90 min (>96%) for membranes doped with natural fruit extract. Water uptake is also determined for the prepared membranes. The physical and chemical properties of the final membranes are investigated by Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), and thermal gravimetric analysis‐differential scanning calorimetry (TGA‐DSC). FTIR spectra indicated no significant modifications of membrane structure due to the small amount of natural fruit extract. The surface morphology shows that the prepared membranes doped with natural fruit extract is more dense and compact. TGA results shows that the prepared membranes are stable up to 330 °C.
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