Sökning: "Christian Maurice"

Visar resultat 6 - 10 av 13 avhandlingar innehållade orden Christian Maurice.

1. 6. Recycling of green liquor dregs in cover application on acid generating mine waste

   Författare :Susanne Nigéus; Jan Laue; Christian Maurice; Jenny Lindblom; Helge Hellevang; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Geoteknik; Soil Mechanics;

   Sammanfattning : The mining industry generates massive amounts of waste that without treatment and in contact with atmospheric oxygen can cause the formation of acid rock drainage (ARD). In Sweden, the most common reclamation measure for mine waste is to apply a multi-layer cover on top of the waste deposit. LÄS MER

3. 7. Preventing Acid Rock Drainage Formation from Sulfidic Waste Rock Using Secondary Raw Materials

   Författare :Elsa Nyström; Lena Alakangas; Andrzej Cwirzen; Christian Maurice; Jose Miguel Nieto; Luleå tekniska universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Applied Geochemistry; Tillämpad geokemi;

   Sammanfattning : One of the central and most challenging environmental problems related to mining is acid rock drainage (ARD) formation. The drainage is characterized by low pH and elevated concentrations of sulfate, metals, and metalloids formed when sulfide-bearing minerals are subjected to oxygen and water. LÄS MER

4. 8. Suitability of industrial residues for preventing acid rock drainage generation from waste rock

   Författare :Elsa Nyström; Lena Alakangas; Hanna Kaasalainen; Christian Maurice; Päivi M. Kauppila; Luleå tekniska universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Applied Geochemistry; Tillämpad geokemi;

   Sammanfattning : One of the main and most challenging environmental problems related to mining is the generation of acid rock drainage (ARD), a leachate characterized by low pH and elevated concentrations of sulfate, metals, and metalloids formed when sulfide-bearing minerals are subjected to oxygen and water. During the operation of a mine, waste rock is often deposited in heaps and usually left under ambient conditions, enabling sulfides to oxidize. LÄS MER

5. 9. Co-disposal of waste rock and lignite fly ash to mitigate the environmental impact of coal mining

   Författare :Asif Qureshi; Björn Öhlander; Christian Maurice; Thomas Pabst; Luleå tekniska universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Acid mine drainage AMD ; coal mine waste rocks; coal fly ash; co-disposal; mixing blending; dry-cover; prevention neutralisation; Tillämpad geokemi; Applied Geochemistry;

   Sammanfattning : Waste rocks (WRs) from coal mining and fly ash (FA) from coal combustion were studied to determine the potential of the WRs to generate AMD, FAs to neutralise it and estimate their impacts on environment. The ultimate goal was to develop a methodology based on co-disposal to mitigate the environmental problems associated to both wastes. LÄS MER

7. 10. Mechanical properties of excavated sulfur rich soil stabilized with cement - A laboratory and field experiment

   Författare :Alaleh Ziagharib; Christian Maurice; Josef Macsik; Qi Jia; Jan Laue; Bo Vesterberg; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Sulfur-rich soil; Mixing; Sampling; Unconfined compressive strength; stabilization; Porosity; Water content; Consistency limits; Geoteknik; Soil Mechanics;

   Sammanfattning : Sulfide soils are silty soils, often found in saturated conditions, under the groundwater level. Characteristics of these soils, including particle size distribution and consistency limits along with chemical composition and environmental properties, cause excavation to be necessary for construction purposes. LÄS MER