Concept

Ozone

Publications associées (228)

Micro-fabricated Alkali Vapor Cells for Chip Scale Atomic Clocks Sealed at Low Temperature with Thin-Film Metallic Bonding

Nico de Rooij, Danick Briand, Yves Pétremand, Rahel Strässle

Micro-fabriced alkali vapor cells and applications in various fields as the heart of ultraprecise sensors, like chip scale atomic clocks, magnetometers or gyroscopes. Miniaturization asks for either new fabrication techniques or new physical concepts or bo ...

2013

Catalytic non-thermal plasma reactor for abatement of toluene

Albert Renken, Lioubov Kiwi

A non-thermal plasma rector with a catalytic electrode made of sintered metal fibres (SMFs) was tested for the oxidative decomposition of a model VOC toluene. The input energy was varied in the range 160-295 J/I by varying the applied voltage between 12.5 ...

Elsevier2012

Chemistry of Ozone in Water and Wastewater Treatment

Urs von Gunten

Even though ozone has been applied for a long time for disinfection and oxidation in water treatment, there is lack of critical information related to transformation of organic compounds. This has become more important in recent years, because there is con ...

IWA Publishing2012

Impacts of changes in land use and land cover on atmospheric chemistry and air quality over the 21st century

Songmei Wu, Jed Oliver Kaplan

The effects of future land use and land cover change on the chemical composition of the atmosphere and air quality are largely unknown. To investigate the potential effects associated with future changes in vegetation driven by atmospheric CO2 concentratio ...

2012

Development of surrogate correlation models to predict trace organic contaminant oxidation and microbial inactivation during ozonation

Urs von Gunten, Yun Ho Lee

The performance of ozonation in wastewater depends on water quality and the ability to form hydroxyl radicals ( OH) to meet disinfection or contaminant transformation objectives. Since there are no on-line methods to assess ozone and OH exposure in wastewa ...

Elsevier2012

Catalytic ozonation of oxalic acid using carbon nanofibres on macrostructured supports

Lioubov Kiwi, Tatiana Iouranova

Carbon nanofibres (CNFs) were grown on different macrostructured supports such as cordierite monoliths, carbon felts and sintered metal fibres. The resulting composites exhibited excellent resistance to attrition/corrosion and its porosity is mainly due to ...

2012

Trade-Offs in Disinfection Byproduct Formation Associated with Precursor Preoxidation for Control of N-Nitrosodimethylamine Formation

Urs von Gunten

Chloramines in drinking water may form N-nitrosodimethylamine (NDMA). Various primary disinfectants can deactivate NDMA precursors prior to chloramination. However, they promote the formation of other byproducts. This study compared the reduction in NDMA f ...

2012

CO2 and R410A: Two-phase flow visualizations and flow boiling measurements at medium (0.50) reduced pressure

John Richard Thome

The conversion to more environmentally friendly refrigerants is of prime importance for refrigeration and air-conditioning industries. A first option for the substitution of the fluids which use was banned could be natural refrigerants, such as CO2, or HFC ...

Pergamon-Elsevier Science Ltd2012

Enhanced Bromate Formation during Chlorination of Bromide-Containing Waters in the Presence of CuO: Catalytic Disproportionation of Hypobromous Acid

Urs von Gunten, Chao Liu

Bromate (BrO3–) in drinking water is traditionally seen as an ozonation byproduct from the oxidation of bromide (Br–), and its formation during chlorination is usually not significant. This study shows enhanced bromate formation during chlorination of brom ...

Amer Chemical Soc2012

Microfabricated All-Around-Electrode Ac Electroosmotic Pump With Simple Design And Increased Velocity Generation

Nico de Rooij, Luca Ribetto

AC electroosmosis is a convenient valveless method to pump liquids, whilst avoiding electrolysis and gas generation. Basic designs presented in the literature often have limited velocity or pressure capabilities. This paper reports a simple approach to the ...

IEEE2012

Graph Chatbot

Chattez avec Graph Search

Posez n’importe quelle question sur les cours, conférences, exercices, recherches, actualités, etc. de l’EPFL ou essayez les exemples de questions ci-dessous.

AVERTISSEMENT : Le chatbot Graph n'est pas programmé pour fournir des réponses explicites ou catégoriques à vos questions. Il transforme plutôt vos questions en demandes API qui sont distribuées aux différents services informatiques officiellement administrés par l'EPFL. Son but est uniquement de collecter et de recommander des références pertinentes à des contenus que vous pouvez explorer pour vous aider à répondre à vos questions.

Connectez-vous pour utiliser Chat avec Graph Search