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Papers by Ulrich Förstner

Journal of Soils and Sediments, Nov 6, 2010

Journal of Soils and Sediments, 2007

Page 1. State of the Art in the USA Sediment Remediation 351 © 2007 ecomed publishers (Verlagsgru... more Page 1. State of the Art in the USA Sediment Remediation 351 © 2007 ecomed publishers (Verlagsgruppe Hüthig Jehle Rehm GmbH), D-86899 Landsberg and Tokyo Mumbai Seoul Melbourne Paris J Soils Sediments 7 (6) 351 358 (2007) State of the Art in the USA ...

Environmental Sciences Europe, 2015

Thanking PD Dr. Wolfgang Ahlf on the occasion of his retirement for his outstanding experimental ... more Thanking PD Dr. Wolfgang Ahlf on the occasion of his retirement for his outstanding experimental and conceptual merits in the field of sediment ecotoxicology and his personal 65th anniversary this article will present a laudation. This Editorial furthermore introduces a series of papers on 'Progress in sediment research and decision making' which is dedicated to Wolfgang Ahlf, one of the longstanding and leading experts in the field of sediment research. We cordially invite all colleagues who feel they can contribute to the topic to submit a manuscript to ESEU with reference to this series.

Environmental Sciences Europe, 2016

A critical review of the last 25 years of dioxin policy in the Elbe river catchment is presented ... more A critical review of the last 25 years of dioxin policy in the Elbe river catchment is presented along seven main theses of the River Basin Community (RBC)-Elbe background document "Pollutants" for the Management Plan 2016-2021. In this period, polychlorinated dibenzodioxins/-furans (PCDD/Fs) and dioxin-like polychlorinated biphenyls (dl-PCBs) will play a major role: (i) as new priority substances for which environmental quality standards (EQSs) need to be derived (Directive 2013/39/EC); (ii) in the search for innovative solutions in sediment remediation (i.e., respecting the influence of mechanical processes; Flood Risk Directive 2007/60/EC); and (iii) as indicators at the land-sea interface (Marine Strategy Framework Directive 2008/56/EC). In the Elbe river catchment, aspects of policy and science are closely connected, which became particularly obvious in a classic example of dioxin hot spot contamination, the case of the Spittelwasser creek. Here, the "source-first principle" of the first cycle of the European Water Framework Directive (WFD) had to be confirmed in a controversy on the dioxin hot spots with Saxony-Anhalt's Agency for Contaminated Sites (LAF). At the Spittelwasser site, the move from "inside the creek" to "along the river banks" goes parallel to a general paradigm shift in retrospective risk assessment frameworks and remediation techniques for organic chemicals (Ortega-Calvo et al. 2015). With respect to dioxin, large-scale stabilization applying activated carbon additions is particularly promising. Another important aspect is the assessment of the ecotoxicology of dioxins and dl-PCBs in context of sediment mobility and flood risk assessment, which has been studied in the project framework FloodSearch. Currently, the quality goals of the WFD to reach a "good chemical status" are not met in many catchment areas because substances such as mercury do and others probably will (PCDD/Fs and dl-PCB) exceed biota-EQS values catchment area-wide. So far, relating biota-EQS values to sediment-EQSs is not possible. To overcome these limitations, the DioRAMA project was initiated, which has led to improved approaches for the assessment of dioxincontaminated sediment using in vitro bioassays and to a robust dataset on the interrelation between dioxins and dioxin-like compounds in sediments and biota.

Journal of Soils and Sediments, Jan 1, 2007

Fundamental and Applied Limnology / Archiv für Hydrobiologie

Acta Hydrochimica et Hydrobiologica

Three geochemical concepts demonstrate the advantage of a long-term strategy compared to the trad... more Three geochemical concepts demonstrate the advantage of a long-term strategy compared to the traditional approaches in waste management: (i) the mobility concept, (ii) the concept of capacity controlling properties, and (iii) the concept of final storage quality, the first being relevant for process studies, the second for effect evaluations and the third for problem solutions. "Final storage quality" indicates the ultimate goal of geochemical engineering and can be reached either by incineration and post-treatment (municipal solid waste) or be incorporation into low-temperature mineral formations which remain stable over geological times.

Marine and Freshwater Research

The effective long-term remediation of contaminated sediments presents a particular challenge, si... more The effective long-term remediation of contaminated sediments presents a particular challenge, since the large volume and the often diverse range of contaminants in these materials makes many of the traditional remediation techniques uneconomic. Future risk assessments of contaminated sediments should focus on assessing possible chemical changes in the stored sediment (e.g. redox changes and acid production) that could lead in the long term to contaminant remobilization. New biological criteria of contaminated sediments are also needed. These risk assessments must be undertaken with the potential remediation methods in mind. Priority needs to be given to the application of new geochemical engineering techniques, including chemical stabilization by additives and storage under permanent anoxic conditions, that optimize the long-term chemical stability of contaminated sediments.

Zeitschrift der Deutschen Gesellschaft für Geowissenschaften