Destruction of EDTA using Ce(IV) mediated electrochemical oxidation: a simple modeling study and experimental verification.
Mediated electrochemical oxidation (MEO) is a recent development in the environmental research field for the complete destruction of organic pollutants. This study presents the destruction of EDTA by cerium(IV) MEO process in nitric acid medium. The destruction reaction was carried out in a continuous stirred tank reactor under various conditions. A simple kinetic model was developed to analyze and simulate the organic destruction in the MEO process. The model was based on the calculation of the total mass balance, the component mass balance, and the energy balance in the reactor and also in the heating jacket. The sensitivity to key operating conditions such as the initial EDTA concentration (50-200 mM), EDTA feeding time (30-180 min), reaction temperature (323-363 K), and the rate laws corresponding to zero-, first-, second-, and third-order reaction were analyzed. It was found that the model simulated agreed well with the experimental data for EDTA oxidation. The results obtained showed the suitability of the MEO process for the effective mineralization of high concentrations of EDTA.
Lee
Jae-Wook
JW
Department of Environmental and Chemical Engineering, Seonam University, Namwon 590-711, Republic of Korea.
Chung
Sang-Joon
SJ
Balaji
Subramanian
S
Kokovkin
Vasily V
VV
Moon
Il-Shik
IS
D002563:Cerium / Q000737:chemistry*; D004492:Edetic Acid / Q000737:chemistry*; D004563:Electrochemistry; D007700:Kinetics; D008956:Models, Chemical; D017942:Nitric Acid / Q000737:chemistry*; D010084:Oxidation-Reduction; D013696:Temperature
D002563:Cerium; D017942:Nitric Acid; D004492:Edetic Acid