Publication

Bromide Sources and Loads in Swiss Surface Waters and Their Relevance for Bromate Formation during Wastewater Ozonation

Related publications (93)

Use of light-supported oxidation processes towards microbiological and chemical contaminants elimination in hospital wastewaters

Hospital wastewaters have been long identified as carriers of chemical and microbiological pollutants. Their amounts and risk levels have initiated numerous works on changing the existing practices of co-treatment with municipal wastewaters and safe dispos ...

EPFL2016

Inactivation efficiency of Escherichia coli and autochthonous bacteria during ozonation of municipal wastewater effluents quantified with flow cytometry and adenosine tri-phosphate analyses

Urs von Gunten, Yun Ho Lee, Nadine Czekalski

Inactivation kinetics of autochthonous bacteria during ozonation of wastewater effluents were investigated using cultivation-independent flow cytometry (FCM) with total cell count (TCC) and intact cell count (ICC) and intracellular adenosine triphosphate ( ...

Elsevier2016

The Role of Bromide in Oxidative Water Treatment

Michèle Bernadette Heeb

Bromide (Br-) levels in fresh waters range from a few ¿gL-1 to several mgL-1. In seawater its concentration is about 67 mgL-1. The goal of this thesis is to assess the fate of bromide during oxidative water treatment and to explore its influence on these t ...

EPFL2016

Inactivation of Antibiotic Resistant Bacteria and Resistance Genes by Ozone: From Laboratory Experiments to Full-Scale Wastewater Treatment

Urs von Gunten, Nadine Czekalski, Helmut Bürgmann

Ozone, a strong oxidant and disinfectant, seems ideal to cope with future challenges of water treatment, such as micropollutants, multiresistant bacteria (MRB) and even intracellular antibiotic resistance genes (ARG), but information on the latter is scarc ...

American Chemical Society2016

Inactivation of enteric viruses by ozone

Urs von Gunten, Tamar Kohn, Camille Wolf

In Switzerland, newly introduced regulation mandates the upgrade of major wastewater treatment plants (WWTP) with an advanced treatment step such as ozonation. This offers a unique opportunity to study the inactivation of enteric virus during ozonation of ...

2016

Oxidation of cetirizine, fexofenadine and hydrochlorothiazide during ozonation: Kinetics and formation of transformation products

Urs von Gunten, Juliane Hollender

The efficiency of wastewater ozonation for the abatement of three nitrogen-containing pharmaceuticals, two antihistamine drugs, cetirizine (CTR) and fexofenadine (FXF), and the diuretic drug, hydrochlorothiazide (HCTZ), was investigated. Species-specific s ...

Elsevier2016

Effect of Ozone Treatment on Nano-Sized Silver Sulfide in Wastewater Effluent

Urs von Gunten, Renata Behra

Silver nanoparticles used in consumer products are likely to be released into municipal wastewater. Transformation reactions, most importantly sulfidation, lead to the formation of nanoscale silver sulfide (nano-Ag2S) particles. In wastewater treatment pla ...

American Chemical Society2015

Combination of UV absorbance and electron donating capacity to assess degradation of micropollutants and formation of bromate during ozonation of wastewater effluents

Urs von Gunten

In this study, the changes in UV absorbance at 254 nm (UVA(254)) and electron donating capacity (EDC) were investigated as surrogate indicators for assessing removal of micropollutants and bromate formation during ozonation of wastewater effluents. To meas ...

Elsevier2015

Novel test procedure to evaluate the treatability of wastewater with ozone

Urs von Gunten, Kristin Schirmer

Organic micropollutants such as pharmaceuticals, estrogens or pesticides enter the environment continuously through the effluent of municipal wastewater treatment plants (WWTPs). Enhanced treatment of wastewater (WW) by ozone (O-3) is probably one of the s ...

Pergamon-Elsevier Science Ltd2015

Environmental considerations on solar disinfection of wastewater and the subsequent bacterial (re)growth

César Pulgarin, Stefanos Giannakis

In this work, solar disinfection of wastewater was studied, focusing on the effect of selected environmental variables, namely light intensity, continuous/intermittent light delivery, and post-irradiation storage as well as dilution in lake water. These va ...

Royal Society of Chemistry2015

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