In situ catchment scale sampling of emerging contaminants using diffusive gradients in thin films (DGT) and traditional grab sampling: a case study of the River Thames, UK

Wang, Runmei ORCID: https://orcid.org/0000-0001-7067-8763; Biles, Emma; Li, Yanying; Juergens, Monika D. ORCID: https://orcid.org/0000-0002-6526-589X; Bowes, Michael J. ORCID: https://orcid.org/0000-0002-0673-1934; Jones, Kevin C. ORCID: https://orcid.org/0000-0001-7108-9776; Zhang, Hao ORCID: https://orcid.org/0000-0003-3641-1816. 2020 In situ catchment scale sampling of emerging contaminants using diffusive gradients in thin films (DGT) and traditional grab sampling: a case study of the River Thames, UK. Environmental Science & Technology, 54 (18). 11155-11164. 10.1021/acs.est.0c01584

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Abstract/Summary

The in situ passive sampling technique, diffusive gradients in thin films (DGT), confronts many of the challenges associated with current sampling methods used for emerging contaminants (ECs) in aquatic systems. This study compared DGT and grab sampling for their suitability to screen and monitor ECs at the catchment scale in the River Thames system (U.K.) and explored their sources and environmental fate. The ubiquitous presence of endocrine disrupting chemicals, parabens, and their metabolites is of concern. This study is the first to report organophosphate esters (OPEs) in the study area. TEP (summer 13–160 and winter 18–46, ng/L) and TCPP (summer 242–4282 and winter 215–854, ng/L) were the main OPEs. For chemicals which were relatively stable in the rivers, DGT and grab sampling were in good agreement. For chemicals which showed high variation in water bodies, DGT provided a better integral of loadings and exposure than grab sampling. DGT was not as sensitive as grab sampling under the procedures employed here, but there are several options to improve it to give comparable/better performance. DGT samples require shorter preparation time for analysis in the laboratory than grab samples. Overall, DGT can be a powerful tool to characterize ECs throughout a large dynamic water system.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	10.1021/acs.est.0c01584
UKCEH and CEH Sections/Science Areas:	Pollution (Science Area 2017-) Water Resources (Science Area 2017-)
ISSN:	0013-936X
Additional Keywords:	impurities, environmental pollution, organic compounds, pharmaceuticals, computer simulations
NORA Subject Terms:	Ecology and Environment
Date made live:	24 Aug 2020 15:35 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/528366

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