Persistent, mobile (PM) substances are being recognized as serious threats to the safety of drinking water resources. The most notorious example of PM substances are per- and polyfluoroalkyl substances (PFAS), but there are numerous others. This worldwide problem has triggered new policy and monitoring actions and the European Green Deal contains a broad initiative for chemical and water regulations for PM substances. As part of this effort, a new, wide-reaching European Research project called ZeroPM (Zero Pollution of Persistent, Mobile substances) will start in October 2021. ZeroPM will interlink and synergize prevention, prioritization and removal strategies to protect the environment and human health from PM substances.
The successful post-doctoral candidate will identify PM substances with relevant bioactivity that emerge in the drinking water production process. Surface water, raw water, and water after different treatment technologies in full-scale water works will be collected and concentrated before it is tested in selected
in vitro bioassays. Bioassays will be performed on water extracts as such and on water extracts eluting from a liquid chromatography (LC) column in a high-resolution fraction collector. Extracts will also undergo non-target screening (NTS) using LC high resolution tandem mass spectrometry (LC-HR-MS/MS). Features with retention times corresponding to the bioactive fractions will be identified by comparison to target analyses performed by collaborating ZeroPM partners and by suspect screening against mass spectral libraries and other databases according to an in-house developed identification strategy. The identity of the putatively identified suspect compounds will be confirmed by LC-HR-MS/MS, their bioactivity in the bioassay, and their PM properties by their physico-chemical properties and by
in silico predictions performed by collaborating ZeroPM partners.
The postdoc will be employed at the Vrije Universiteit Amsterdam (VUA) - Department of
Environment and Health (The Netherlands). The department covers three disciplines, i.e. analytical chemistry, toxicology and epidemiology. Outstanding qualities in the mono-disciplinary cornerstones yield excellent opportunities for multi- and transdisciplinary research and education. Integration leads to greater insight and discoveries and is essential to cover the complete pathway from the source of the contaminants to adverse health outcomes. Within ZeroPM, international collaboration is foreseen in particular with the German Water Centre and Norwegian Geotechnical Institute. Come join our team and make a meaningful impact on healthy living.
Your duties
- Run in vitro bioassays on water extracts before and after high-resolution fractionation
- Perform non-target chemical screening on water extracts
- Collaborate with ZeroPM partners regarding sample collection, target analysis, and PM property assessment
- Give regular progress updates at ZeroPM project meetings and group meetings
- Supervise BSc and MSc students doing an internship or literature study within the ZeroPM project
- Write progress reports and scientific papers