title: Efficient removal of Indigo Carmine dye by a separation process.
abstract: 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.
authors.affiliation: Faculty of Applied Chemistry and Materials Science, Inorganic Chemistry, Physical Chemistry and Electrochemistry Department, Politehnica University of Bucharest, 1-7 Polizu Street, P.O. 011061, Bucharest, Romania.
authors.forename: Simona
authors.initials: S
authors.lastname: Caprarescu
authors.affiliation: Faculty of Applied Chemistry and Materials Science, Analytical Chemistry and Environmental Engineering Department, Politehnica University of Bucharest, Calea Grivitei no. 132, P.O. 010737, Bucharest, Romania E-mail: andra3005@yahoo.com.
authors.forename: Alexandra Raluca
authors.initials: AR
authors.lastname: Miron
authors.affiliation: Polymer Department, National Research and Development Institute for Chemistry and Petrochemistry-ICECHIM, Splaiul Independentei, no. 202, P.O. 060021, Bucharest, Romania.
authors.forename: Violeta
authors.initials: V
authors.lastname: Purcar
authors.affiliation: Polymer Department, National Research and Development Institute for Chemistry and Petrochemistry-ICECHIM, Splaiul Independentei, no. 202, P.O. 060021, Bucharest, Romania.
authors.forename: Anita-Laura
authors.initials: AL
authors.lastname: Radu
authors.affiliation: Polymer Department, National Research and Development Institute for Chemistry and Petrochemistry-ICECHIM, Splaiul Independentei, no. 202, P.O. 060021, Bucharest, Romania.
authors.forename: Andrei
authors.initials: A
authors.lastname: Sarbu
authors.affiliation: National Research & Development Institute for Cryogenics and Isotopic Technologies-ICSI-Rm. Valcea, P.O. Box Raureni 7, Ramnicu Valcea 240050, Romania.
authors.forename: Daniela
authors.initials: D
authors.lastname: Ion-Ebrasu
authors.affiliation: University Apollonia, 'Acad. Ioan Haulica' Research Institute, Muzicii Street, no.2, P.O. 700399, Iasi, Romania.
authors.forename: Leonard-Ionuţ
authors.initials: LI
authors.lastname: Atanase
authors.affiliation: Polymer Department, National Research and Development Institute for Chemistry and Petrochemistry-ICECHIM, Splaiul Independentei, no. 202, P.O. 060021, Bucharest, Romania.
authors.forename: Marius
authors.initials: M
authors.lastname: Ghiurea
mesh_terms: D000327:Adsorption; D004396:Coloring Agents / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007203:Indigo Carmine / Q000737:chemistry*; D007474:Ion Exchange; D008567:Membranes, Artificial; D008855:Microscopy, Electron, Scanning; D012996:Solutions; D017550:Spectroscopy, Fourier Transform Infrared; D013818:Thermogravimetry; D014865:Waste Disposal, Fluid / Q000379:methods; D014874:Water Pollutants, Chemical / Q000737:chemistry*
chemical_list: D004396:Coloring Agents; D008567:Membranes, Artificial; D012996:Solutions; D014874:Water Pollutants, Chemical; D007203:Indigo Carmine