PhD position on Role of bromide during ozonation: Formation of bromine-containing oxidation by-products

Closing Date
WorkplaceDübendorf, Zurich region, Switzerland


Eawag, the Swiss Federal Institute of Aquatic Science and Technology, is an internationally networked aquatic research institute within the ETH Domain (Swiss Federal Institutes of Technology). Eawag conducts research, education and expert consulting to achieve the dual goals of meeting direct human needs for water and maintaining the function and integrity of aquatic ecosystems.

The Department of Water Resources & Drinking Water (W+T) at Eawag and the Laboratory for Water Quality and Treatment at the Swiss Federal Institute of Technology, Lausanne (EPFL) are offering a

PhD position on Role of bromide during ozonation: Formation of bromine-containing oxidation by-products

The application of ozone for disinfection or abatement of micropollutants during treatment of drinking water and wastewater is accompanied by ozone reactions with matrix components such as dissolved organic matter (DOM) and bromide. During ozonation of bromide-containing waters, various reactive bromine intermediates are formed, which may lead to an enhanced oxidation of DOM/micropollutants and/or the formation of brominated OBPs. The reactivity of bromine transient species such as Br.and BrO, which can be formed during ozonation and advanced oxidation processes, will be investigated during ozonation, and in g -radiolysis and a pulse radiolysis systems. This will lead to a better understanding of the role of direct ozone reactions and hydroxyl radical reactions. This information will be applied to further develop bromate minimization strategies for enhanced wastewater treatment.

The main objectives of this PhD thesis is
Elucidation of the kinetics and mechanisms of the reactions of bromide with ozone and/or hydroxyl radical with the formation of reactive bromine species and the potentially carcinogenic bromate.

These objectives will be addressed as follows
To better understand ozone and hydroxyl radical reactions with bromide and the formation of transient bromine species and bromate experiments with selective scavenging of intermediates, combination of ozone with various enhancers and g - and pulse radiolysis experiments will be performed. By this approach the reactivity of transient bromine species such as Br.and BrO.towards natural organic matter and ozone/hydroxyl radicals can be studied.

The ideal candidates will have a strong experimental background in either chemistry or environmental chemistry with a master’s degree.

The PhD candidates will workat the Drinking Water Chemistry Group at Eawag under the supervision of Prof. Dr. Urs von Gunten. The PhD candidates will be enrolled in the doctoral program of the School of Architecture, Environmental and Civil Engineering (ENAC) at EPFL. This position is fully funded through a four year period by the Swiss National Science Foundation. The preferred start is January 2019.

Eawag offers a unique research and working environment and is committed to promoting equal opportunities for women and men and to support the compatibility of family and work. For more information about Eawag and our work conditions please consult ?" target="_blank" rel="nofollow"> and ?" target="_blank" rel="nofollow"> . State-of-the-art experimental facilities and a highly interdisciplinary research environment is available for this PhD project at Eawag.

Deadline for applications is 15 December 2018.
The position will remain open until a suitable candidate is found. Your application should include a CV, academic transcripts (with undergraduate grades), a statement of research interests and motivation and names and contact information of 2-3 academic referees (please do not include letters with the application).

For further information, please visit the website of the Drinking Water Chemistry group at Eawag and/or of the group Laboratory for Water Quality and Treatment LTQE at EPFL.

We look forward to receive your application. Please send it through this webpage, any other way of application will not be considered. A click on the button below will take you directly to the application form.

In your application, please refer to
and reference  JobID 41643.

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