TY - JOUR
AU - Joo Kim, Hyung
AB - An electrochemical COD (chemical oxygen demand) sensor using an electrode-surface grinding unit was investigated. The electrolyzing (oxidizing) action of copper on an organic species was used as the basis of the COD measuring sensor. Using a simple three-electrode cell and a surface grinding unit, the organic species is activated by the catalytic action of copper and oxidized at a working electrode, poised at a positive potential. When synthetic wastewater was fed into the system, the measured Coulombic yields were found to be dependent on the COD of the synthetic wastewater. A linear correlation between the Coulombic yields and the COD of the synthetic wastewater was established (10–1000 mg L) when the electrode-surface grinding procedure was activated briefly at 8 h intervals. When various kinds of wastewater samples obtained from various sewage treatment plants were measured, linear correlations (≥ 0.92) between the measured EOD (electrochemical oxygen demand) value and COD of the samples were observed. At a practical wastewater treatment plant, the measurement system was successfully operated with high accuracy and good stability over 3 months. These experimental results show that the application of the measurement system would be a rapid and practical method for the determination of COD in water industries.
TI - Performance of an electrochemical COD (chemical oxygen demand) sensor with an electrode-surface grinding unit
JF - Journal of Environmental Monitoring
DO - 10.1039/b713393f
DA - 2007-12-01
UR - https://www.deepdyve.com/lp/royal-society-of-chemistry/performance-of-an-electrochemical-cod-chemical-oxygen-demand-sensor-mAMX0cD7ka
SP - 1352
EP - 1357
VL - 9
IS - 12
DP - DeepDyve
ER -