Concept

Dioxyde de chlore

Publications associées (73)

Impact of virus aggregation on inactivation by peracetic acid and implications for other disinfectants

Tamar Kohn, Paolo Perona, Benoît Crouzy, Krista Rule Wigginton, Michael Jon Mattle, Moritz Brennecke

Viruses in wastewater and natural environments are often present as aggregates. The disinfectant dose required for their inactivation, however, is typically determined with dispersed viruses. This study investigates how aggregation affects virus inactivati ...

2011

Synthesis of new oxathiazinane dioxides and their in vitro cancer cell growth inhibitory activity

Pierre Vogel, Claudia Bello, Françoise Borcard, Matthias Baud

New oxathiazinane dioxides have been derived from D- and L-serine and tested for their in vitro cell growth inhibitory activity toward SKBR3 breast cancer cells. (5R)-5-(4-(4'-Bromomethyl)phenyl)benzyloxymethyl-[1,3,4]-oxathiazinane- 3,3-dioxide showed a c ...

2010

Gas assisted focused electron beam induced etching of alumina

Patrik Willi Hoffmann, Tristan Bret, Bamdad Afra

This study investigates focused electron beam induced etching for the removal of alumina particles on patterned extreme ultra violet (EUV) mask using nitrosyl chloride (NOCl) as assist gas. As potential contaminant, particles of aluminum oxide (alumina, Al ...

2009

Trihalomethane formation during water disinfection in four water supplies in the Somes river basin in Romania

Urs von Gunten

Background, aim and scope After the discovery of chloroform in drinking water, an extensive amount of work has been dedicated to the factors influencing the formation of halogenated disinfections by-products (DBPs). The disinfection practice can vary signi ...

2009

Oxidative elimination of cyanotoxins: Comparison of ozone, chlorine, chlorine dioxide and permanganate

Urs von Gunten, Eva Maria Rodriguez Franco

As the World Health Organization (WHO) progresses with provisional Drinking Water Guidelines of 1 mu g/L for microcystin-LR and a proposed Guideline of 1 mu g/L for cylindrospermopsin, efficient treatment strategies are needed to prevent cyanotoxins such a ...

2007

Oxidation of N-nitrosodimethylamine (NDMA) precursors with ozone and chlorine dioxide: Kinetics and effect on NDMA formation potential

Urs von Gunten

The oxidation of N-nitrosodimethylamine (NDMA) precursors during water treatment was investigated using ozone and chlorine dioxide (ClO2). Second-order rate constants for the reactions of model NDMA precursors (dimethylamine (DMA) and 7 tertiary amines) wi ...

2007

Understanding medicinal taste and odour formation in drinking waters

Urs von Gunten

The formation of bromophenols during chlorination of phenol- and bromide-containing waters can be critical for taste and odour problems in drinking waters. The work performed has confirmed that flavour threshold concentrations of some bromophenols are in t ...

2007

Kinetics and mechanistic aspects of As(III) oxidation by aqueous chlorine, chloramines, and ozone: Relevance to drinking water treatment

Urs von Gunten

Kinetics and mechanisms of As(III) oxidation by free available chlorine (FAC-the sum of HOCl and OCl-), ozone (O-3), and monochloramine (NH2Cl) were investigated in buffered reagent solutions. Each reaction was found to be first order in oxidant and in As( ...

2006

Differences in the chlorine reactivity of four microcystin analogues

Urs von Gunten

The presence of microcystin toxins in drinking water is highly undesirable as they have the potential to adversely affect human health. Consequently, effective removal of these toxins from water is a major goal for water authorities. In this study, four mi ...

2006

Indoor air purification and ventilation systems sanitation with essential oils

Claude-Alain Roulet

Ventilation systems often host bacteria and fungi that may be dangerous for the health of exposed people. Essential oils are one means among others to prevent microbial development. Used as a basis for many traditional therapies, these odorant plant extrac ...

2006

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