Two-step in situ decontamination of mine water enriched with arsenic and iron

2008 ◽  
pp. 547-554
Author(s):  
B Doušová ◽  
T Brůha ◽  
A Martaus ◽  
D Koloušek ◽  
R Pažout ◽  
...  
Keyword(s):  
Mine Water

Adhesion Studies of Microorganisms on Natural Ore Material

2017 ◽  
Vol 262 ◽  
pp. 398-402
Author(s):  
Nadja Eisen ◽  
Felix Straube ◽  
Simone Schopf ◽  
Michael Schlömann
Keyword(s):  
Mine Water ◽  
Preferential Attachment ◽  
Ore Deposits ◽  
Community Members ◽  
Iron Oxidizing Bacteria ◽  
In Situ Conditions ◽  
Different Temperatures ◽  
Acidic Mine Water ◽  
External Conditions

In the course of the decline of high-grade ore deposits, new effective and eco-friendly bioleaching techniques are of interest. In-situ leaching is an auspicious method, but composition of leaching community should be adapted to the respective external conditions and the ore material. In this study several sulfidic minerals were inoculated into acidic mine water of a mine in eastern Germany, housing members of well-known iron oxidizing bacteria like Acidithiobacillus, Leptospirillum and Ferrovum. The attachment tests were performed in batch and in a continuous way at different temperatures. The analysis of the extracted DNA from adhered cells showed an enrichment of Ferrovum spp. on chalcopyrite surface under in-situ conditions at 11°C. For laboratory batch conditions an accumulation of Leptospirillum spp. was detected for adhered cells probably due to the changes of the physicochemical parameter of the mine water. In more detailed analyses we aim to elucidate possible preferential attachment of the mine water community members to certain minerals.

In-Lake Bioreactors for the Treatment of Acid Mine Water in Pit Lakes

2007 ◽  
Vol 20-21 ◽  
pp. 271-274 ◽  
Author(s):  
Volker Preuss ◽  
Martin Horn ◽  
Matthias Koschorreck ◽  
Günter Luther ◽  
Katrin Wendt-Potthoff ◽  
...  
Keyword(s):  
Mine Water ◽  
Treatment Process ◽  
Mining District ◽  
Pit Lake ◽  
Acid Mine Water ◽  
Acid Mine ◽  
Results Of Treatment ◽  
Sufficient Energy ◽  
Mode Of Operation

For the treatment of acid mine water an in-situ pilot plant with a self-sufficient energy supply and remote data transmission was tested in acidic pit lake 111, a small lake in the Lusatian mining district in Germany. In this paper the design of the enclosure-bioreactor in-lake system, the mode of operation of a three-stage treatment process by the use of anaerobic fixed film reactors and the results of treatment are shown.

Zero-valent iron nanoparticles in treatment of acid mine water from in situ uranium leaching

Chemosphere ◽  
2011 ◽  
Vol 82 (8) ◽  
pp. 1178-1184 ◽  
Author(s):  
Stepanka Klimkova ◽  
Miroslav Cernik ◽  
Lenka Lacinova ◽  
Jan Filip ◽  
Dalibor Jancik ◽  
...  
Keyword(s):  
Mine Water ◽  
Iron Nanoparticles ◽  
Zero Valent Iron ◽  
Acid Mine Water ◽  
Uranium Leaching ◽  
Acid Mine ◽  
Zero Valent Iron Nanoparticles

scholarly journals Potential Effect of Porosity Evolution of Cemented Paste Backfill on Selective Solidification of Heavy Metal Ions

2020 ◽  
Vol 17 (3) ◽  
pp. 814 ◽  
Author(s):  
Yixuan Yang ◽  
Tongqian Zhao ◽  
Huazhe Jiao ◽  
Yunfei Wang ◽  
Haiyan Li
Keyword(s):  
Mine Water ◽  
Pollution Assessment ◽  
Potential Effect ◽  
Water Tank ◽  
Cemented Paste Backfill ◽  
Porosity Evolution ◽  
Mining Depth ◽  
Paste Backfill

Cemented paste backfill (CPB) is a common environmentally friendly mining approach. However, it remains undetermined whether CPB pollutes underground mine water. Tank leaching analysis of a CPB mass in distilled water was performed for 120 d, and water quality was tested in situ for a long-term pollution assessment. Computerized tomography was also used to determine the CPB micro-pore structure and ion-leaching mechanism. The dissolved Zn2+, Pb2+ and As5+ concentrations in the leachate peaked at 0.56, 0.11 and 0.066 mg/L, respectively, whereas the Co2+ and Cd2+ concentrations were lower than the detection limit. The CPB porosity decreased from 46.07% to 40.88% by soaking, and 80% of the pore diameters were less than 13.81 μm. The permeability decreased from 0.8 to 0.5 cm/s, and the quantity, length, and diameter of the permeate channels decreased with soaking. An in-situ survey showed novel selective solidification. The Zn2+ concentration in the mine water was 10–20 times that of the background water, and the Pb2+ concentration was 2–4 times the regulated value. Although the Pb2+ content decreased significantly with mining depth, there remains a serious environmental risk. Mine water pollution can be reduced by adding a solidifying agent for Pb2+ and Zn2+, during CPB preparation.

In-situ Treatment of Radioactive Mine Water using Reactive Materials - Results of Laboratory and Field Experiments in Uranium Ore Mines in Germany

2001 ◽  
Vol 29 (2-3) ◽  
pp. 129-138 ◽  
Author(s):  
Petra Schneider ◽  
Peter L. Neitzel ◽  
Karsten Osenbrück ◽  
Chigua Noubacteb ◽  
Broder Merkel ◽  
...  
Keyword(s):  
Mine Water ◽  
Field Experiments ◽  
Uranium Ore ◽  
Reactive Materials

In Situ Mine Water Treatment: Field Experiment at the Flooded Königstein Uranium Mine (Germany)

2013 ◽  
Vol 33 (1) ◽  
pp. 39-47 ◽  
Author(s):  
Ulf Jenk ◽  
Udo Zimmermann ◽  
Uli Uhlig ◽  
Ralph Schöpke ◽  
Michael Paul
Keyword(s):  
Water Treatment ◽  
Field Experiment ◽  
Mine Water ◽  
Uranium Mine ◽  
Mine Water Treatment

A study of mine water inrushes by measurements of in situ stress and rock failures

2015 ◽  
Vol 79 (3) ◽  
pp. 1961-1979 ◽  
Author(s):  
Shangxian Yin ◽  
Jincai Zhang ◽  
Demin Liu
Keyword(s):  
Mine Water ◽  
In Situ Stress

Rendez vous with Saturn's rings

1984 ◽  
Vol 75 ◽  
pp. 743-759 ◽  
Author(s):  
Kerry T. Nock
Keyword(s):  
Solar Energy ◽  
Electric Propulsion ◽  
Power Source ◽  
Propulsion System ◽  
Low Thrust ◽  
Ring Plane ◽  
The Earth ◽  
Total Impulse ◽  
Saturn's Rings

ABSTRACTA mission to rendezvous with the rings of Saturn is studied with regard to science rationale and instrumentation and engineering feasibility and design. Future detailedin situexploration of the rings of Saturn will require spacecraft systems with enormous propulsive capability. NASA is currently studying the critical technologies for just such a system, called Nuclear Electric Propulsion (NEP). Electric propulsion is the only technology which can effectively provide the required total impulse for this demanding mission. Furthermore, the power source must be nuclear because the solar energy reaching Saturn is only 1% of that at the Earth. An important aspect of this mission is the ability of the low thrust propulsion system to continuously boost the spacecraft above the ring plane as it spirals in toward Saturn, thus enabling scientific measurements of ring particles from only a few kilometers.

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