RESEARCHING THE DECOMPOSITION KINETICS OF ACID 2,4-DICHLOROPHENOXYACETIC IN AN AQUEOUS ENVIRONMENT BY DC HIGH VOLTAGE ELECTRICAL TECHNOLOGY WITH THE PLASMA APPEARANCE ON THE IRON ELECTRODE
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https://doi.org/10.54939/1859-1043.j.mst.76.2021.82-88Keywords:
Cold plasma; High voltage direct current; OH• free radicals; 2,4-D treatment; Iron electrode.Abstract
The DC high voltage electrochemical plasma with the appearance of plasma on the electrodes generates active free radicals and oxidizing agents such as ·OH, H2O2. These agents cause the efficient decomposing of 2,4-dichlorophenoxyacetic (2,4-D) organic compounds in the aqueous environment. This paper studied some factors affecting the rate of 2,4-D degradation reaction and mineralization efficiency through chemical oxygen demand index (COD) and total organic carbon index (TOC) content in aqueous solution over time. The research results showed that the decomposition reaction rate of 2,4-D depended on the electrical conductivity and the value of pH. The COD value decreased from 106.0 mg/L to 2.2 mg/L. Similarly, the TOC value decreased from 6.1 mg/L to 2.1 mg/L after 120 minutes of discharge, the ability mineralization of 2,4-D to CO2 reached 65.6 percent.
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