Interaction between nitrogen and phosphorus cycles in mining-affected aquatic systems—experiences from field and laboratory measurements
In: Environmental science and pollution research: ESPR, Band 20, Heft 8, S. 5722-5736
ISSN: 1614-7499
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In: Environmental science and pollution research: ESPR, Band 20, Heft 8, S. 5722-5736
ISSN: 1614-7499
In: Environmental science and pollution research: ESPR, Band 28, Heft 35, S. 48728-48741
ISSN: 1614-7499
AbstractWaste rocks (WRs) from a lignite-producing coalfield and fly ash (FA) produced from the same lignite have been investigated in this study with a primary objective to determine the potential for co-disposal of WRs and FA to reduce the environmental contamination. Mixing WRs with FA and covering WRs with FA have been investigated. Particle size effect caused ≤2 mm particles to produce low pH (~2) and metal-laden leachates, indicating higher sulphide minerals' reactivity compared to larger particles (≤10 mm, pH ~ 4). Co-disposal of FA as mixture showed an instantaneous effect, resulting in higher pH (~3–6) and better leachate quality. However, acidity produced by secondary mineralisation caused stabilisation of pH at around 4.5–5. In contrast, the pH of the leachates from the cover method gradually increased from strongly acidic (pH ~ 2) to mildly acidic (pH ~ 4–5) and circumneutral (pH ~ 7) along with a decrease in EC and elemental leaching. Gradually increasing pH can be attributed to the cover effect, which reduces the oxygen diffusion, thus sulphide oxidation. FA cover achieved the pH necessary for secondary mineralisation during the leaching experiment. The co-disposal of FA as cover and/or mixture possesses the potential for neutralisation and/or slowing down AMD and improving leachate quality.
In: Environmental science and pollution research: ESPR, Band 26, Heft 4, S. 4104-4115
ISSN: 1614-7499
In: Environmental science and pollution research: ESPR, Band 23, Heft 1, S. 648-660
ISSN: 1614-7499
In: Environmental science and pollution research: ESPR, Band 23, Heft 17, S. 17083-17094
ISSN: 1614-7499
In: Environmental science and pollution research: ESPR, Band 24, Heft 25, S. 20372-20389
ISSN: 1614-7499
In: Environmental science and pollution research: ESPR, Band 22, Heft 13, S. 10047-10057
ISSN: 1614-7499
In: Environmental science and pollution research: ESPR, Band 21, Heft 11, S. 6836-6844
ISSN: 1614-7499
The mining environment, medical geology and urban geochemistry form a group of related scientific disciplines that have developed strongly during recent years in the Nordic countries. Modern legislation controls the environmental issues. Close co-operation of researchers and legislators has improved the quality and safety of life in the societies of the Nordic countries. In mining environmental studies, methods that are suitable in Arctic conditions have been developed; in medical geology, the input from the Nordic countries has made it an appreciated scientific discipline throughout the world, and in the case of the urban environment, methods developed by our geochemists have especially improved the health conditions, particularly of children. ; Validerad; 2008; 20080825 (ysko)
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