Sökning: "mineral precipitation"
Visar resultat 1 - 5 av 61 avhandlingar innehållade orden mineral precipitation.
1. Environmental aspects of coal mine drainage: a regional study of Moatize in Mozambique
Sammanfattning : Mozambique is one of the largest coal producers in Africa. Extraction of the coal is carried out in the Moatize district of the Tete province in the center of the country. A surface mining technique is used to extract the coal below ground level. LÄS MER
2. Constraining the timing of veins, faults and fractures in crystalline rocks by in situ Rb-Sr geochronology
Sammanfattning : Precambrian cratons are continent cores archiving the oldest crustal histories on Earth. The crystalline basement of cratons is typically characterized by complex arrays of multiple fracture and fault generations hosting minerals formed by fluids flowing through fracture networks. LÄS MER
3. On the solubility of radium sulfate and carbonate
Sammanfattning : Radium is one of the most toxic elements and its concentration in different human activities and migration from man-made wastes provokes a strong interest in environmental science. To be able to model the migration process, reliable experimental thermodynamic data of radium compounds are needed. LÄS MER
4. Mineral dissolution from molecular to field scale
Sammanfattning : Mineral reactivity contributes to the global biogeochemical cycling of elements. CO2is consumed during the chemical weathering of many silicates and during formation of carbonates in the oceans. LÄS MER
5. Precipitation and fixation of uranium in reduced environment : simulation in a continuous culture of sulfate-reducing bacteria
Sammanfattning : The precipitation and fixation of the uranyl ion (U022+), in a reduced environment, has been investigated by means of continuous cultivation of sulphate-reducing bacteria. The continuous culture sustem made it possible to study the chemical reactions under physico-chemical conditions (e.g. LÄS MER