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Full-Text Articles in Physical Sciences and Mathematics
Advanced Oxidation Processes For The Remediation Of Problematic Organophosphorus Compounds And Perfluoroalkyl Substances, A M Abdullah
Advanced Oxidation Processes For The Remediation Of Problematic Organophosphorus Compounds And Perfluoroalkyl Substances, A M Abdullah
FIU Electronic Theses and Dissertations
The presence of persistent organic pollutants, including organophosphorus esters (OPEs) and perfluoroalkyl substances (PFASs) in drinking water sources, is a serious threat to the environment and human health. Advanced oxidation processes (AOPs), specifically TiO2 photocatalysis and sonolysis, were evaluated to degrade these pollutants in water.
The UV/TiO2 photocatalysis can effectively degrade tris (2-chloroethyl) phosphate (TCEP) to innocuous materials. The degradation follows pseudo-first-order kinetics and consistent with the Langmuir-Hinshelwood model. Intermediate products identified by 31P-NMR show sequential oxidation of alkyl chains, ultimately leading to phosphate. Scavenger studies indicate hydroxyl radical (•OH) is the primary species responsible for the …
The Investigation Of Photocatalytic And Adsorptive Properties Of Humic Acid Grafted Magnetite Nanoparticles For The Remediation Of Arsenic, Selenium And Phosphorous From Water, Mohammad Mamunur Rashid
The Investigation Of Photocatalytic And Adsorptive Properties Of Humic Acid Grafted Magnetite Nanoparticles For The Remediation Of Arsenic, Selenium And Phosphorous From Water, Mohammad Mamunur Rashid
FIU Electronic Theses and Dissertations
The crisis of freshwater has been a big concern worldwide. Water contamination that occurs through the discharge of toxic pollutants from different natural and anthropogenic sources have worsened the situation. Adsorption has emerged as a simple and economical water treatment procedure although the challenge is to find the right adsorbent that can efficiently remove the target contaminant followed by their easy recovery from the reaction vessel. In this dissertation, I have focused on the synthesis, characterizations and applications of environmentally compatible and magnetic humic acid coated magnetite nanoparticles (HA-MNP) as a potential adsorbent for water purification.
Phosphate is an essential …