Micropollutants in three tributaries of Lake Constance, Argen, Schussen and Seefelder Aach: a literature review

Abstract

Entsprechend Artikel 4 der EU-Wasserrahmenrichtlinie ist der "gute ökologische und chemische Zustand" der Oberfl ächengewässer ein Um weltziel, das bis 2015 erreicht werden soll [1]. Hierbei soll der Funktion der Gewässer als Lebens raum besondere Aufmerksamkeit gewidmet werden. Vor dem Hintergrund dieser Zielsetzung ist es notwendig, dass Daten zur Präsenz von Umweltschadstoff en und anderweitigen Belastungsfaktoren in Oberfl ächengewässern mit Informationen zu deren möglicher Wirkung auf die Lebewelt in den Abstract A literature review made evident that in three tributaries of Lake Constance, Argen, Schussen and Seefelder Aach 82 micropollutants (including 3 metabolites of pesticides) were detected in at least one of the streams. Quality standards according to the EU Water Frame Directive (which however comprises only 16 of the detected chemicals) are not exceeded in any of the streams. The comparison of maximal values with existing threshold values and eff ect concentrations obtained in ecotoxicological analyses and biomarker studies revealed 35 substances to be of relevance in at least one of the three waters. These were 5 chemicals in the Argen, 31 chemicals in the Schussen, and 17 chemicals in the Seefelder Aach, for which eff ects on mortality, development, health or reproduction in aquatic organisms cannot be excluded. Micropollutants in three tributaries

Diclofenac: New data on chronic toxicity and bioconcentration in fish

“…Diclofenac can be detected in effluents of wastewater treatment plants (low µg/L range) and the aquatic environment (ng/L to low µg/L range) in many countries 1–3. Although the removal efficiency varies, sewage treatment plants are generally not able to remove DCF to a high extent, as both the biodegradability and the elimination by adsorption of DCF to activated sludge is low (reviewed by Zhang et al 1 and Pal et al 4).…”

Fish embryo tests with Danio rerio as a tool to evaluate surface water and sediment quality in rivers influenced by wastewater treatment plants using different treatment technologies

“…Since sediment-bound pollutants can be remobilized by bioturbation (Power and Chapman 1992) or flood events (Hollert et al 2000;Oetken et al 2005;Gerbersdorf et al 2011), they can become available to and thus hazardous for aquatic biota (Bartzke et al 2010). The presence of pharmaceuticals in the aquatic environment and the effects of polluted sediments have already been demonstrated in the studies by Keiter et al (2006), Triebskorn and Hetzenauer (2012), and Vincze et al (2014).…”

Impact of a Wastewater Treatment Plant Upgrade on Amphipods and Other Macroinvertebrates: Individual and Community Responses

“…Sampling sites S 4 (N47 • 44 ′ 20.46 ′′ , E9 • 53 ′ 42.78 ′′ ) and S 5 (N47 • 36 ′ 09.71 ′′ , E9 • 34 ′ 01.91 ′′ ) were situated at the Argen river. This river served as a less polluted reference site (Triebskorn and Hetzenauer, 2012). Sampling of gammarids took place at S 0, S 3, and S 5, whereas the macrozoobenthic community was investigated at sites S 0, S 1, S 2, S 3, and S 4.…”

“…The study was conducted in the area of Lake Constance, Southern Germany, which serves as a major drinking water reservoir. The focus was on two major tributaries of Lake Constance: the river Schussen as a model stream located in a densely populated catchment area, and the river Argen representing a less anthropogenically influenced reference stream (Triebskorn and Hetzenauer, 2012). At the Schussen, the largest WWTP (Langwiese, AZV Mariatal) which treats about 50% of the wastewater of the catchment area has been upgraded with an additional powdered activated carbon stage in September 2013.…”