KINETIC MODELING TO PROBE THE ADVANCED OXIDATION PROCESSES IN A FE(II)-PAA-ABTS, A FE(VI)-PAA AND A FE(VI)-AMINE SYSTEMS
Author(s)
Sadhasivan, Manasa
Advisor(s)
Huang, Ching-Hua
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Abstract
Pharmaceuticals are one of the major groups of emerging environmental contaminants in recent years. Advanced oxidation processes (AOPs) are known to be more efficient than conventional treatment processes in the degradation of pharmaceutical micropollutants. Novel AOPs use several oxidants such as ferrate (Fe(VI)) and peracetic acid (PAA) in order to generate highly reactive species which further degrade micropollutants. Furthermore, suitable activators can be combined with the oxidants to produce enhanced efficient in AOPs. The overall objective of this study is to investigate qualitatively and quantitatively the reaction mechanisms of the iron intermediate species (Fe(V) and Fe(IV)) in three different AOP systems that exploit the oxidizing potential of Fe(VI) or activated Fe(II). The three systems investigated are the Fe(II)-PAA-ABTS (2,2′-azino-bis(3-ethyl-benzothiazoline-6-sulfonic acid), Fe(VI)-PAA and Fe(VI)-DMA systems. The experimental results are collected and examined in depth by constructing robust kinetic models for the respective oxidative systems to study the mechanisms involved. Sensitivity analysis and goodness-of-fit tests are further conducted to validate the kinetic models. Overall, this study presents a useful methodology and new modeling tools to quantitatively probe the advanced oxidation systems to gain new insights in the mechanism involved.
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Date
2021-05-11
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