Themed collection Ultraviolet-based Advanced Oxidation Processes (UV AOPs)
The rapidly growing role of UV-AOPs in the production of safe drinking water
Guest editors Stuart Khan, Graham Gagnon, Michael Templeton and Dionysios (Dion) Dionysiou introduce the Ultraviolet-based advanced oxidation processes (UV-AOPs) themed issue of Environmental Science: Water Research & Technology.
Cyto- and geno-toxicity of 1,4-dioxane and its transformation products during ultraviolet-driven advanced oxidation processes
Ultraviolet-driven advanced oxidation processes (UV/AOPs) are integral steps in water reuse treatment trains.
Solar photocatalysis with modified TiO2 photocatalysts: effects on NOM and disinfection byproduct formation potential
The overall reactivity of natural organic matter from river water towards chlorine was increased by solar TiO2 treatment with TiO2 nanomaterials modified with nitrogen, boron, or silver to improve their solar light utilization.
Comparison of advanced oxidation processes in the decomposition of diuron and monuron – efficiency, intermediates, electrical energy per order and the effect of various matrices
The efficiency of UV-photolysis, ozonation, their combination and heterogeneous photocatalysis was investigated and compared in various matrices.
Efficient degradation of cytotoxic contaminants of emerging concern by UV/H2O2
The degradation kinetics and cytotoxicity of two commonly detected contaminants of emerging concern (CECs), diclofenac and triclosan, in UV/H2O2 system were investigated in this study.
Biofouling control by UV/H2O2 pretreatment for brackish water reverse osmosis process
UV applied with H2O2 is a well-known advanced oxidation process (AOP) for degradation of trace organic compounds. In this study, the UV/H2O2 process was applied as a pre-treatment step to control reverse osmosis biofouling.
Improving UV/H2O2 performance following tertiary treatment of municipal wastewater
The ability of UV/AOP to treat trace organic contaminants (TOrCs) in wastewater is inhibited by (1) UV light-absorbing species and (2) hydroxyl radical (˙OH) scavenging species.
Emerging investigators series: ultraviolet and free chlorine aqueous-phase advanced oxidation process: kinetic simulations and experimental validation
An elementary reaction based kinetic model was developed for the fate of acetone degradation in UV/free chlorine advanced oxidation process.
Temperature dependence of the absorbance of 185 nm photons by water and commonly occurring solutes and its influence on the VUV advanced oxidation process
185 nm absorption properties of water and common solutes within temperatures relevant to water treatment.
Photo-oxidation of 11-nor-9-carboxy-Δ9-tetrahydrocannabinol using medium-pressure UV and UV/H2O2 – a kinetic study
Direct UV photolysis is the primary contributor to the degradation of THC-COOH in an aqueous solution.
Reaction rates and product formation during advanced oxidation of ionic liquid cations by UV/peroxide, UV/persulfate, and UV/chlorine
Ionic liquid cations can be removed from contaminated source water by various UV-based advanced oxidation processes due to efficient reactions with hydroxyl and sulfate radicals.
Elimination of transforming activity and gene degradation during UV and UV/H2O2 treatment of plasmid-encoded antibiotic resistance genes
This study determined deactivation of transforming activity of an ARG and the ARG degradation during UV and UV/H2O2 treatment of plasmid pUC19 containing an ampicillin resistance gene.
The fate of dichloroacetonitrile in UV/Cl2 and UV/H2O2 processes: implications on potable water reuse
The findings have important implications for the control of preformed DBPs by subsequent UV-AOPs for potable water reuse.
Emerging investigators series: comparative study of naproxen degradation by the UV/chlorine and the UV/H2O2 advanced oxidation processes
The UV/chlorine and UV/H2O2 AOPs on the degradation of naproxen were compared. The efficiency of naproxen was much higher by UV/chlorine compared to UV/H2O2 under all the tested conditions. ClO˙ and CO3˙− played important roles in the degradation of naproxen.
Degradation of 1H-benzotriazole by UV/H2O2 and UV/TiO2: kinetics, mechanisms, products and toxicology
Benzotriazoles are emerging contaminants widespread in environmental waters.
Potential formation of mutagenicity by low pressure-UV/H2O2 during the treatment of nitrate-rich source waters
LP-UV/H2O2 treatment of NOM-containing synthetic waters led to nitrite, nitrophenol and measurable but not mutagenic Ames responses in the presence of nitrate, where the NOM type affected the response levels.
About this collection
Edited by ESWRT Associate Editors Graham Gagnon (Dalhousie University, Canada), Stuart Khan (University of New South Wales, Australia) and Mike Templeton (Imperial College London, UK) and Advisory Board member Dion Dionysiou (University of Cincinnati, USA) this collection showcases some of the latest research on the theme of Ultraviolet-based Advanced Oxidation Processes (UV AOPs). This includes by-products, kinetics, and toxicity of UV AOP treatment; LED and alternative UV sources; alternative UV AOP oxidants; the impact of pre-treatment steps on UV AOP performance; fluence measurement and performance monitoring; life cycle assessments and more.