Electrochemical degradation of geosmin using electrode of Ti/IrO2-Pt

Electrochemical degradation of geosmin was assessed at a typical anode Ti/IrO2-Pt, as a treatment method in musty odor compounds. The influences of dosage of NaCl, current density, initial geosmin concentration and initial solution pH on electrochemical geosmin degradation were investigated. HOCl formed during electrolysis would play an important role on the oxidation of geosmin. For the Ti/IrO2-Pt anode, geosmin concentration decreased from around 600 to 8 ng/L after 60 min of electrolysis with 3.0 g/L NaCl as supporting electrolyte at the current density of 40 rnA/cm(2). Moreover, efficient degradation of geosmin solution with different initial pH was found and the electrochemical oxidation ability of Ti/IrO2-Pt anode will not drop after serviced for long hours under the present experimental condition. These results suggested that electrochemical degradation would be a promising treatment for effective and rapid removal of musty odor compounds. (C) 2010 Elsevier B.V. All rights reserved.