Burke, Victoria and Schneider, Laura and Greskowiak, Janek and Zerball-van Baar, Patricia and Sperlich, Alexander and Dünnbier, Uwe and Massmann, Gudrun
(2018)
Trace organic removal during river bank filtration for two types of sediment.
Water, 10 (12).
p. 1736.
ISSN 2073-4441
Abstract
The process of bank filtration acts as a barrier against many anthropogenic micropollutants,
such as pharmaceuticals and industrial products, leading to a substantial improvement of
groundwater quality. The performance of this barrier is, however, affected by seasonal influences
and subject to significant temporal changes, which have already been described in the literature.
Much less is known about spatial differences when considering one field site. In order to investigate
this issue, two undisturbed cores from a well-investigated bank filtration field site were sampled and
operated in the course of a column study. The ultimate aim was the identification and quantification of
heterogeneities with regard to the biodegradation of 14 wastewater derived micropollutants, amongst
others acesulfame, gabapentin, metoprolol, oxypurinol, candesartan, and olmesartan. While six of the
compounds entirely persisted, eight compounds were prone to degradation. For those compounds
that were subject to degradation, degradation rate constants ranged between 0.2 day-1 (gabapentin)
and 31 day-1 (valsartan acid). Further, the rate constants consistently diverged between the distinct
cores. In case of the gabapentin metabolite gabapentin-lactam, observed removal rate constants
differed by a factor of six between the cores. Experimental data were compared to values calculated
according to two structure based prediction models.
Actions (login required)
 |
View Item |
