Details

Autor(en) / Beteiligte

• Valenzuela, Alma L.
• Vasquez-Medrano, Ruben
• Ibanez, Jorge G.
• Frontana-Uribe, Bernardo A.
• Prato-Garcia, Dorian

Titel

Remediation of Diquat-Contaminated Water by Electrochemical Advanced Oxidation Processes Using Boron-Doped Diamond (BDD) Anodes

Ist Teil von

• Water, air, and soil pollution, 2017-02, Vol.228 (2), p.1, Article 67

Ort / Verlag

Cham: Springer International Publishing

Erscheinungsjahr

2017

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The electrochemical elimination of the herbicide diquat dibromide (DQ) in an undivided electrochemical cell (Condiacell®-type cell) and an H-type cell (a divided electrochemical cell) using boron-doped diamond (BDD) electrodes is reported for the first time. The degradation of essentially 100% of the DQ present was achieved in the undivided electrochemical cell and ca. 92% in the H-type cell. Nearly 80% of the total organic carbon ( TOC ) and of the chemical oxygen demand ( COD ) were removed after 5 h of treatment at different current densities (i.e., 0.5, 1.0, and 1.5 mA/cm 2 for the undivided cell, and 2.5, 5.0, and 7.5 mA/cm 2 for the H-type cell) with a maximum specific energy consumption of approximately 150 kWh kg −1 of COD degraded in the undivided cell, and 300 kWh kg −1 of COD in the H-type cell. Energy consumption of about 0.30 kWh g −1 of TOC occurred in the undivided electrochemical cell and 2.0 in the H-type cell. In spite of obtaining similar percentages of DQ degradation and of COD and TOC removal, a smaller energy usage was required in the undivided cell since smaller current densities were employed. Best results were obtained with the undivided cell, since it required a smaller current density to obtain virtually the same percentage of DQ degradation and removal of COD and TOC . The results obtained herein show that the use of electrochemical advanced oxidation processes may be a good alternative for DQ degradation in polluted water.