Institute For Wasser Und Boden Dr Uhlmann

Dresden, Germany

Institute For Wasser Und Boden Dr Uhlmann

Dresden, Germany

Time filter

Source Type

Totsche O.,Lausitzer und Mitteldeutsche Bergbau Verwaltungsgesellschaft mbH | Benthaus F.-C.,Lausitzer und Mitteldeutsche Bergbau Verwaltungsgesellschaft mbH | Uhlmann W.,Institute For Wasser Und Boden Dr Uhlmann | Theiss S.,Institute For Wasser Und Boden Dr Uhlmann
FOG - Freiberg Online Geoscience | Year: 2015

In the post mining landscape two areas are affected by iron ochre: The southern Spree area upstream the Spremberg reservoir and the northern Spree area, which includes the southern tributaries to the Spreewald (see Part 1). LMBV developed concepts for both areas and took first measures. The main aim of these measures is the protection of the Spremberg reservoir in the southern Spree area and the biosphere reserve Spreewald in the northern Spree area. In the medium-term the iron load of all first order and second order streams should be reduced. At hot spots in the southern Spree area mobile container based water treatment plants will be built for the short-term. In the medium-term the iron rich groundwater will be collected by drains and filtering wells before it enters the rivers. The effect of a sealing wall is investigated as long-term solution. At the northern Spree area an old mine water treatment plant was recommissioned as treatment plant for stream water. Additionally a new stream water treatment plant was build. In the medium-term these measures will be complemented by other iron reducing measurements in the catchment area. © 2015, Technical University Freiberg. All rights reserved.


Uhlmann W.,Institute For Wasser Und Boden Dr Uhlmann | Theiss S.,Institute For Wasser Und Boden Dr Uhlmann | Totsche O.,Lausitzer und Mitteldeutsche Bergbau Verwaltungsgesellschaft mbH | Benthaus F.-C.,Lausitzer und Mitteldeutsche Bergbau Verwaltungsgesellschaft mbH
FOG - Freiberg Online Geoscience | Year: 2015

The groundwater lowering in the Lusatian lignite mining district caused the aeration of Tertiary, Pleistocene and Holocene sediments in the cone of depression for decades. Thereby the pyrite was oxidized. This formed acidic, sulphate and iron rich ground waters. The ground water rising brings the weathering products iron and sulfate into the watercourses as diffuse sources. Especially, the rivers Spree and Kleine Spree south of the town Spremberg as well as the southerly tributaries to the Spreewald are affected. The main sources of the iron contamination are Pleistocene aquifers and Holocene low-level moors. In small watercourses the iron concentration can be more than 100 mg/L. In the river Spree south of Spremberg the iron concentration is between 3 and 8 mg/L depending on the flow rate. In the Lusatia more than 100 km of the main watercourses are affected by the sedimentation of iron hydroxides. © 2015, Technical University Freiberg. All rights reserved.


Nixdorf B.,TU Brandenburg | Uhlmann W.,Institute For Wasser Und Boden Dr Uhlmann | Lessmann D.,TU Brandenburg
Limnologica | Year: 2010

About one third of several hundred mining lakes in Eastern Germany are highly acidified, and there is a need to restore them to neutral conditions because they constitute an environmental hazard for water resources and downstream environments. The aim of this study is to evaluate the efficiency of three different acid pit lake water remediation treatments: dilution with alkaline (river) water, limestone treatment and biological neutralization by organic carbon-driven alkalinity generation. The efficiency is evaluated for the acidic mining lake Grünewalder Lauch by adjusting input values into a geochemical model and making future projections. Current approaches, such as flooding with neutral surface water or extensive liming, are not suitable for many lakes because of a limited supply of alkaline water or high lime immobilizing potential of Fe- and Al-rich water in acidic lakes, respectively. Further treatment methods are, therefore, designed to combine water supply and biological measures with the management of water quality by the application of in-lake microbial processes. These processes are focused on the metabolic response of aquatic ecosystems to nutrient enrichment (enhancement of primary production and thereby organic carbon supply) and the microbial decomposition of organic matter and their effects on the gain or loss of alkalinity. The results and comparisons of different neutralization measures will be generalized by the application of hydrogeochemical models for alkalinity production showing. a)the long term efficiency of the measures, depending on carbon turnover at the sediment/water interface,b)the development of bicarbonate buffering capacity as a consequence of biological measures,c)the importance of pyrite formation instead of FeS. © 2010 Elsevier GmbH. All rights reserved.

Loading Institute For Wasser Und Boden Dr Uhlmann collaborators
Loading Institute For Wasser Und Boden Dr Uhlmann collaborators