RT Conference Proceedings
T1 Improving Cr (VI) Extraction through Electrodialysis
A1 García-Delgado, Rafael Antonio
A1 Nieto-Castilo, A
A1 Villén-Guzmán, María Dolores
A1 Cerrillo-González, María del Mar
A1 Gómez-Lahoz, César
A1 Vereda-Alonso, Carlos
A1 Paz-García, Juan Manuel
A1 Rodríguez-Maroto, José Miguel
K1 Electrodiálisis
AB A laboratory study has been carried out to determine the feasibility of in situ remediation of chromium (VI)contaminated soil using electrodialysis. In a classic setup, this technique implies the application of a low intensity directcurrent to the soil, which is separated from the electrode compartments by ion-exchange membranes. If the pollutantsare ionic compounds, they can be forced to migrate to the oppositely charged electrode by electro-migration.Membranes selectively impede the flow of ions in the electrode compartments back to the soil. If a metal species isnaturally present as an anion, mobilization from the soil at alkaline pH can be realized and, at the same time, themobilization of other metal cations that occur at low pH can be minimized.Experiments have been carried out with clayey soils (kaolinite clay and soil clay mixtures) that have beencharacterized and then contaminated by mixing with a potassium dichromate solution for several days. Initial Cr (VI)content ranges from 500 to 4000 mg/kg. Treatment tests were carried out in an acrylic laboratory cells consisting of acentral soil compartment and two electrode compartments located at both ends of the column. Dimensionally stabletitanium electrodes coated with mixed metal oxides were placed in the electrode compartments. 0.01M Na2SO4electrolytes were recirculated through them from two 1-liter deposits using a peristaltic pump. Two commercial ionexchange membranes separated the anolyte and catholyte compartments from the soil in the standard configuration. Aprogrammable DC: power supply was connected to the electrodes and a computer for data acquisition.
YR 2019
FD 2019-10-08
LK https://hdl.handle.net/10630/18535
UL https://hdl.handle.net/10630/18535
LA eng
NO Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech.The authors acknowledge the financial support from the "Plan Propio de Investigación de la Universidad de Málaga" with project numbers PPIT.UMA.D1; PPIT.UMA.B1.2017/20 and PPIT.UMA.B5.2018/17. This work has also received funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement No. 778045.
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 20 ene 2026