Advanced Water Management Centre

AWMC Seminar Program: Lena Mutzner EAWAG

Passive sampling: An efficient way to monitor micropollutants in sewer overflows?

Abstract: In case of rain events, untreated wastewater can be discharged via sewer overflows to creeks and lakes. High spatio-temporal variability characterizes micropollutants (urban used pollutants such as pesticides and pharmaceuticals) discharged from these sewer overflows. Hence, reliable monitoring of micropollutants in sewer overflows is challenging. We propose passive samplers (Chemcatcher® for polar, organic substances) as an alternative to active water sampling. Our results indicate sufficient sensitivity of passive samplers for short exposures so that typical rain event durations (<30 h) can be sampled integratively. Although time-weighted average concentrations estimated via passive sampling are higher than in composite water samples – on average by a factor 2.7 – we conclude that passive sampling is a cost-effective approach to identify locations with critical concentration ranges.

Event Details
Date & Time: 
Friday, 15 December 2017
9am - 10am
Venue: AIBN Building 75, Level 1 Seminar Room

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