Mineralization and biodegradability enhancement of natural organic matter by ozone–VUV in comparison with ozone, VUV, ozone–UV, and UV: Effects of pH and ozone dose

The Study Into Potential Enhacement Of Metalworking Fluids Biodegradability By The Application Of O3/UV

“…Ozone and/or hydroxyl radicals (  OH) generated from the decomposition of ozone degrade recalcitrant organic compounds to smaller molecules, which are more hydrophilic and biodegradable. Bacteria in the biological filter utilize the oxidized organic compounds as the substrate (22). In combined chemical and biological wastewater treatment, it is very important to keep in mind how the characteristics of each individual treatment, such as the chemical oxidant to be used (photo-Fenton or Fenton reagent, O3/H2O2, O3/UV, H2O2/UV, TiO2/UV, etc.)…”

Degradation of Paracetamol and Norfloxacin in Aqueous Solution Using Vacuum Ultraviolet (VUV) Process

“…Obviously, the increase of VUV power increased the of degradation rate. This was because more hydroxyl radicals generation and photolysis reaction by 185 and 254 nm wavelength to break down the contaminant [4]. UV performed less effective than VUV.…”

“…Advanced oxidation processes (AOPs) are the promising technologies employing hydroxyl radicals (OH • ) to degrade the contaminants. Among AOPs, vacuum ultraviolet (VUV) process has gained a lot attention recently [4]- [6]. This because an advantage of VUV in that it generates OH • without addition of chemicals [7] addition, the contaminants can be degraded by direct photolysis.…”

Production of mono- and di-carboxylated polyethylene glycols as a factor obstacle to the successful ozonation-assisted biodegradation of ethoxylated compounds

“…Numerous studies have demonstrated the ability of ozone to convert recalcitrant organic matters into more biodegradable compounds (e.g., Ratpukdi et al, 2010). Targets for ozonation vary widely, from natural organic matter (Ratpukdi et al, 2010;Trequer et al, 2010) to compounds produced by human activities, such as recalcitrant organic matter found in cork processing wastewater Santos et al, 2013), in pulp-and-paper mill effluent (Bijan and Mohseni, 2004;Medeiros et al, 2008), and in landfill leachate (Cortez et al, 2010;Cui et al, 2014), dyes (Goekcen and Oezbelge, 2006;Meenatchisundaram et al, 2014), substituted phenols (Hsu et al, 2006;Garcia-Peña et al, 2012), and surfactants (e.g. Lechuga et al, 2014).…”