Publication
Impact of chlorination and ozonation of dissolved organic matter on its photo-induced production of long-lived photooxidants and excited triplet states
Related publications (40)
Photochemical oxidation of phenols and anilines mediated by phenoxyl radicals in aqueous solution
Urs von Gunten, Silvio Canonica, Stephanie Christa Remke
Reactive intermediates formed upon irradiation of chromophoric dissolved organic matter (CDOM) contribute to the degradation of various organic contaminants in surface waters. Besides well-studied "short-lived" photo oxidants, such as triplet state CDOM (3 ...
PERGAMON-ELSEVIER SCIENCE LTD2022Phototransformation of Organic Contaminants in Aquatic Systems: Characterization of Long-Lived Photooxidants Derived from Dissolved Organic Matter
The increasing interest in the fate of organic contaminants in the aquatic environment requires the elucidation of relevant abiotic transformation processes. These processes often involve the ubiquitous dissolved organic matter (DOM), a complex mixture of ...
EPFL2021Optical properties and photochemical production of hydroxyl radical and singlet oxygen after ozonation of dissolved organic matter
Urs von Gunten, Frank Jonathan Leresche
This study focuses on the effects of ozonation on the optical and photochemical properties of dissolved organic matter (DOM). Upon ozonation, a decrease in light absorption properties of DOM was observed concomitantly with a large increase in singlet oxyge ...
ROYAL SOC CHEMISTRY2021New and improved methods for integrated models of metabolism and gene expression
The beginning of the 21st century was marked by the advent of disruptive technologies, which ushered an era of groundbreaking advances in fundamental sciences, carried by the great pace at which computational capabilities spread and evolved. But the new ce ...
EPFL2021KAT Ligation for Rapid and Facile Covalent Attachment of Biomolecules to Surfaces
Nako Nakatsuka, Nicholas Spencer
The efficient and bioorthogonal chemical ligation reaction between potassium acyltrifluoroborates (KATs) and hydroxylamines (HAs) was used for the surface functionalization of a self-assembled monolayer (SAM) with biomolecules. An alkane thioether molecule ...
2021Shape Engineering of Metal-Organic Frameworks via MOF@Polymer Composite Fabrication
Metal-organic frameworks (MOFs) are a fascinating class of porous materials that have become the subject of research owing to their unique characteristics such as high surface areas, low densities, and structural tunability. Recently, the research has been ...
EPFL2020Building biosecurity for synthetic biology
Marie-Valentine Renée Agnès Florin
The fast-paced field of synthetic biology is fundamentally changing the global biosecurity framework. Current biosecurity regulations and strategies are based on previous governance paradigms for pathogen-oriented security, recombinantDNAresearch, and broa ...
2020Monitoring the energy of the metal ion-content plasma-assisted deposition and its implication for bacterial inactivation
Cu-polyester (Cu-PES) was sputtered by high power impulse magnetron sputtering (HIPIMS) and by low energy direct current magnetron sputtering (DCMS). The total amount and distribution of the Ar+, Cu+ and Cu2+ ions were determined as well as the bacterial i ...
ELSEVIER SCIENCE BV2019Laser flash photolysis study of the photoinduced oxidation of 4-(dimethylamino)benzonitrile (DMABN)
Urs von Gunten, Frank Jonathan Leresche, Silvio Canonica
Aromatic amines are aquatic contaminants for which phototransformation in surface waters can be induced by excited triplet states of dissolved organic matter ((DOM)-D-3*). The first reaction step is assumed to consist of a one-electron oxidation process of ...
ROYAL SOC CHEMISTRY2019Effects of Ozone on the Photochemical and Photophysical Properties of Dissolved Organic Matter
Urs von Gunten, Frank Jonathan Leresche, Silvio Canonica
This study focused on the effects of ozonation on the photochemical and photophysical properties of dissolved organic matter (DOM). Upon ozonation, a decrease in DOM absorbance was observed in parallel with an increase in singlet oxygen (O-1(2)) and fluore ...
AMER CHEMICAL SOC2019