Electrochemical advanced oxidative degradation of amino tri(methylene phosphonic acid)
The degradation efficiency of the electrochemical advanced oxidation process on ATMP was explored using a plate and frame electrochemical advanced oxidation device to investigate the effects of key parameters such as solution flow rate,temperature,pH,current density,and Na2SO4 concentration value;The degradation mechanism of ATMP was explored using electron paramagnetic resonance testing,free radical quenching experiments,and ATMP degradation kinetics.The results showed that when the solution flow rate was 450mL/min,temperature was 30℃,pH was 9,current density was 300A/m2,and concentration of electrolyte Na2SO4 was 0.1mol/L,the degradation rate of ATMP was the highest,reaching 99.7％within 80minutes,the Electrochemical Advanced Oxidation Process(EAOPs)was found to effectively degrade ATMP;In operating conditions,it was observed that changes in current density,solution flow rate,and temperature could affect the ATMP degradation rate,however,a change in temperature required high energy consumption,while the solution flow rate had little impact on the degradation rate,only a change in current density offered the advantage of low energy consumption and a significant impact on the ATMP degradation rate,therefore,this system was deemed suitable for using current density as the core control parameter of the reaction;The·OH(hydroxyl radical)and SO4-·(sulfate radical)generated by the EAOPs system used in this study are both involved in the degradation of ATMP,with reaction rate constants of k·OH,ATMP=(7.50±0.05)× 108L/(mol·s)and kSO4-·,ATMP=(5.63±1.20)× 107L/(mol·s),respectively,the·OH(hydroxyl radical)was found to play a major role in the degradation of ATMP.
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