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.
Efficient removal of Indigo Carmine dye by a separation process
Simona Caprarescu, Alexandra Raluca Miron, Violeta Purcar, Anita-Laura Radu, Andrei Sarbu, Daniela Ion-Ebrasu, Leonard-Ionuţ Atanase, Marius Ghiurea; Efficient removal of Indigo Carmine dye by a separation process. Water Sci Technol 18 November 2016; 74 (10): 2462–2473. doi: https://doi.org/10.2166/wst.2016.388
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