NDLI: Impact of contaminants bound to suspended particulate matter in the context of flood events

Content Provider	Springer Nature Link
Author	Wölz, Jan Fleig, Michael Schulze, Tobias Maletz, Sibylle Lübcke von Varel, Urte Reifferscheid, Georg Kühlers, Dirk Braunbeck, Thomas Brack, Werner Hollert, Henner
Copyright Year	2010
Abstract	The presented study investigated on contamination of suspended particulate matter (SPM) in rivers that was sampled long-term and with higher frequency during a flood event at the river Rhine. It was conducted to determine in vitro biological effects as well as to identify and quantify compound classes and effective contaminants. Research was part of investigation on hazards of contaminants bound to SPM to inundated sites and retention areas that are inundated during flood events.SPM was sampled in 2006 and more frequently in a flood event (August, 2007) at the river Rhine barrage of Iffezheim, Germany. SPM was GC-MS analyzed for hexachlorobenzene (HCB), several polychlorinated biphenyls (PCBs) as well as for polycyclic aromatic hydrocarbons (PAHs). Flood samples were fractionated applying a recently developed automated fractionation method to receive further insight into contaminant loads in flood SPM. Impacts on biological scale were assessed using in vitro biotests for xenometabolic 7-ethoxyresorufin-o-deethylase (EROD) assay as well as for mutagenic activity (Ames fluctuation assay). EROD induction was calculated as biological equivalent concentrations (bio-TEQs) and mutagenic potentials were shown as NOECs and maximum induction factors.Chemical analysis gave low concentrations of PCBs (2006 and 2007) and HCB (2006). HCB concentrations increased during the flood in 2007 (maximum, 110 µg/kg SPM). Concentrations of PCBs were only initially elevated in the flood (maximum, 67 µg/kg SPM). EROD induction bio-TEQs ranged from 1,160 to 6,640 pg/g SPM in 2006 and showed maximum bio-TEQ at the peak discharge in 2007. There was no mutagenic activity with SPM of both years. Fractionation indicated highest EROD induction in PAH fractions with prioritized (EPA-) PAHs contributing to less than 1% to the fractions total bio-TEQ but also fractions containing more polar-to-polar substances were shown to contribute minor. Furthermore, more polar fractions were mutagenic active with SPM sampled after the peak of discharge (IF$_{max}$ = 14.7).Contaminants bound to flood SPM can be hazardous to inundated retention areas. Concentrations can be assumed to be increasing correlated with discharge and, thus, with more extreme flood events. Furthermore, biological effects are elevated or first place appearing with SPM from floods. Hazards have to be expected not only from persistent and non-polar substances but alike from less persistent and more polar ones that, furthermore, are more relevant evaluating hazards to drinking water resources from public well fields.
Starting Page	1174
Ending Page	1185
Page Count	12
File Format	PDF
ISSN	14390108
Journal	Journal of Soils and Sediments
Volume Number	10
Issue Number	6
e-ISSN	16147480
Language	English
Publisher	Springer-Verlag
Publisher Date	2010-06-25
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Ames fluctuation assay Dioxin-like EROD assay Flood Effect-directed analysis Suspended particulate matter Environmental Physics Environment Soil Science & Conservation
Content Type	Text
Resource Type	Article
Subject	Stratigraphy Earth-Surface Processes

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