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Statements

Subject Item
n2:RIV%2F61989100%3A27350%2F14%3A86090089%21RIV15-MZE-27350___
rdf:type
n10:Vysledek skos:Concept
dcterms:description
The paper deals with a possible utilization of wood ash as a reagent in treating acid mine drainage (AMD) from opencast mining of brown coal. Wood ash samples were obtained having combusted deciduous and coniferous tree wood in a household furnace. The dominant mineral phases in wood ash are calcite, quartz, lime and periclase. The used AMD is characteristic of high contents of sulphates, iron, manganese, heavy metals and low pH. The AMD treatment process included dosing of wood ash to adjust pH values about 8.3 (a dose of 0.5 g.l-1) or calcium hydroxide (a dose of 0.2 g.l-1) for comparison. The reaction time was 20 minutes. Dosing of wood ash in AMD resulted in an increase of pH in solution from 3.5 to 8.3, which caused the removal of metal ions mainly by precipitation, co-precipitation and adsorption. Comparing the application of Ca(OH)2 in AMD treatment, at an almost identical pH value the concentrations fell in both cases for Fe, Mn, As, Co, Cu, Ni, Zn, Mg, Al and Mo. Applying wood ash the drop was even more distinct in Mn, Zn and Mg. The results of sedimentation tests in an Imhoff cone confirm that the settling capacities of sludge using wood ash are significantly better than when using calcium hydroxide in acid mine drainage treatment. The paper deals with a possible utilization of wood ash as a reagent in treating acid mine drainage (AMD) from opencast mining of brown coal. Wood ash samples were obtained having combusted deciduous and coniferous tree wood in a household furnace. The dominant mineral phases in wood ash are calcite, quartz, lime and periclase. The used AMD is characteristic of high contents of sulphates, iron, manganese, heavy metals and low pH. The AMD treatment process included dosing of wood ash to adjust pH values about 8.3 (a dose of 0.5 g.l-1) or calcium hydroxide (a dose of 0.2 g.l-1) for comparison. The reaction time was 20 minutes. Dosing of wood ash in AMD resulted in an increase of pH in solution from 3.5 to 8.3, which caused the removal of metal ions mainly by precipitation, co-precipitation and adsorption. Comparing the application of Ca(OH)2 in AMD treatment, at an almost identical pH value the concentrations fell in both cases for Fe, Mn, As, Co, Cu, Ni, Zn, Mg, Al and Mo. Applying wood ash the drop was even more distinct in Mn, Zn and Mg. The results of sedimentation tests in an Imhoff cone confirm that the settling capacities of sludge using wood ash are significantly better than when using calcium hydroxide in acid mine drainage treatment.
dcterms:title
The application of wood ash as a reagent in acid mine drainage treatment The application of wood ash as a reagent in acid mine drainage treatment
skos:prefLabel
The application of wood ash as a reagent in acid mine drainage treatment The application of wood ash as a reagent in acid mine drainage treatment
skos:notation
RIV/61989100:27350/14:86090089!RIV15-MZE-27350___
n3:aktivita
n16:P
n3:aktivity
P(QI112A132)
n3:cisloPeriodika
02/2014
n3:dodaniDat
n8:2015
n3:domaciTvurceVysledku
n17:4104897 n17:5454328
n3:druhVysledku
n18:J
n3:duvernostUdaju
n19:S
n3:entitaPredkladatele
n4:predkladatel
n3:idSjednocenehoVysledku
3870
n3:idVysledku
RIV/61989100:27350/14:86090089
n3:jazykVysledku
n11:eng
n3:klicovaSlova
Sedimentation test; pH Value, Removal; Acid Mine Drainage (AMD); Wood Ash (WA)
n3:klicoveSlovo
n6:Removal n6:Acid%20Mine%20Drainage%20%28AMD%29 n6:pH%20Value n6:Sedimentation%20test n6:Wood%20Ash%20%28WA%29
n3:kodStatuVydavatele
GB - Spojené království Velké Británie a Severního Irska
n3:kontrolniKodProRIV
[1D12C4D47D7A]
n3:nazevZdroje
Minerals Engineering. Volume 56
n3:obor
n5:DJ
n3:pocetDomacichTvurcuVysledku
2
n3:pocetTvurcuVysledku
3
n3:projekt
n9:QI112A132
n3:rokUplatneniVysledku
n8:2014
n3:svazekPeriodika
56
n3:tvurceVysledku
Heviánková, Silvie Bestová, Iva Kyncl, Miroslav
n3:wos
000331432300012
s:issn
0892-6875
s:numberOfPages
3
n7:doi
10.1016/j.mineng.2013.10.032
n14:organizacniJednotka
27350