Concept

Photodégradation

Publications associées (51)

A Mechanochemical Switch to Control Radical Intermediates

Ursula Röthlisberger, Elizabeth Claire Brunk

B-12-dependent enzymes employ radical species with exceptional prowess to catalyze some of the most chemically challenging, thermodynamically unfavorable reactions. However, dealing with highly reactive intermediates is an extremely demanding task, requiri ...

2014

Development of mutagenicity during degradation of N-nitrosamines by advanced oxidation processes

Urs von Gunten, Kristin Schirmer, Silvio Canonica

Development of mutagenicity of five N-nitrosamines (N-nitrosodimethylamine (NDMA), N-nitrosodiethylamine (NDEA), N-nitrosodi-n-propylamine (NDPA), N-nitrosopyrrolidine (NPYR) and N-nitrosodiphenylamine (NDPhA)) was investigated during oxidative processes i ...

Elsevier2014

Spatio-Temporal Presence of Micropollutants and their Metabolites in Lake Geneva and Susceptibility to Direct and Indirect Photodegradation Processes

Florence Bonvin

Invisible to the human eye, yet ubiquitous... The occurrence and the potential adverse effects of micropollutants in the environment are uncontested. Due to incomplete removal by conventional wastewater treatment technologies, the aquatic environment is co ...

EPFL2013

Photocatalytic Nanolithography of Self-Assembled Monolayers and Proteins

Esther Amstad

Self-assembled monolayers of alkylthiolates on gold and alkylsilanes on silicon dioxide have been patterned photocatalytically on sub-100 nm length-scales using both apertured near-field and apertureless methods. Apertured lithography was carried out by me ...

American Chemical Society2013

Enhancement of micropollutant degradation at the outlet of small wastewater treatment plants

David Andrew Barry, Luca Rossi, Alessandro Brovelli, Jonas Margot, Pierre Claude Jean Queloz

The aim of this work was to evaluate low-cost and easy-to-operate engineering solutions that can be added as a polishing step to small wastewater treatment plants to reduce the micropollutant load to water bodies. The proposed design combines a sand filter ...

Public Library of Science2013

Methode pour la preparation des copolymeres blocs pour systemes auto-assembles multifonctionnels

Jeffrey Alan Hubbell, Nicola Tirelli

The invention provides methods for the preparation of multiblock copolymers, dispersions of multiblock copolymers, vesicles and micelles containing multiblock copolymers, and oxidative degradation products of multiblock copolymers. ...

2012

Progressive activation of degradation processes in solid oxide fuel cells stacks: Part I: Lifetime extension by optimisation of the operating conditions

Daniel Favrat, Jan Van Herle, Arata Nakajo

The degradation of solid oxide fuel cells (SOFC) depends on stack and system design and operation. A methodology to evaluate synergistically these aspects to achieve the lowest production cost of electricity has not yet been developed. A repeating unit mod ...

Elsevier2012

Spin filtering neutrons with a proton target dynamically polarized using photo-excited triplet states

Tim Rolf Eichhorn

In a test of principle a neutron spin filter has been built, which is based on dynamic nuclear polarization (DNP) using photo-excited triplet states. This DNP method has advantages over classical concepts as the requirements for cryogenic equipment and mag ...

2012

Significant decrease of THMs generated during chlorination of river water by previous photo-Fenton treatment at near neutral pH

César Pulgarin

An important issue in chlorine drinking water disinfection is the generation from natural organic matter (NOM) of disinfection by-products (DBPs), especially trihalomethanes (THMs). The THMs generation can be limited by reducing the levels of NOM prior to ...

2012

Anaerobic degradation of vinyl chloride in aquifer microcosms

Christof Holliger

The anaerobic degradation potential at a chloroethene-contaminated site was investigated by operating two anoxic column aquifer microcosms enriched in iron(III). One column was fed with vinyl chloride (VC) only (column A) and one with acetate in addition ( ...

American Society of Agronomy2011

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