Reaction pathways and kinetic parameters of sonolytically induced oxidation of dimethyl methylphosphonate in air saturated aqueous solutions |
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| Authors: | Kevin E. O’Shea Ailette Aguila K. Vinodgopal Prashant V. Kamat |
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| Affiliation: | (1) Department of Chemistry, Florida International University, 33199 Miami, Florida;(2) Department of Chemistry, Indiana University Northwest, 46408 Gary, Indiana;(3) Radiation Laboratory, University of Notre Dame, 46556-8068 Notre Dame, Indiana |
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| Abstract: | The oxidation of dimethyl methylphosphonate (DMMP) was examined under ultrasonic conditions (640 kHz) in oxygen saturated aqueous solutions. Acetic acid, formic acid, methylphosphonic acid, phosphate, and oxalic acid have been identified as the major products produced during the sonolytic irradiation of DMMP. The initial rates of oxidation were determined as a function of initial DMMP concentration. The kinetic behavior of the system is consistent with the Langmuir-Hinshelwood model implying oxidative processes occur at or near the gas-liquid interface during cavitation. Mechanistic implications and conclusions are discussed based on the product distributions and kinetic parameters. |
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