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Statements

Subject Item
n2:RIV%2F61388980%3A_____%2F14%3A00429128%21RIV15-AV0-61388980
rdf:type
n13:Vysledek skos:Concept
dcterms:description
TG-DTA, MS detections and XRD were used to characterize thermal behaviour of iron precipitates from acid mine drainage prepared by precipitation with urea and natural iron precipitates sampled from sludge bed (settling pit Sedem A3/4ien and old abandoned adit Hodrua, mining area Banska tiavnica, Slovakia). The high-resolution transmission electron microscopy and scanning electron microscopy (SEM) techniques were used to characterize the surface microstructure and shape of the synthesized and sampled iron precipitates. The SEM micrographs of the iron precipitates (natural and precipitated with urea) show that the samples had formed into agglomerates, probably due to attractive forces of quite large surface area. During heating of the all samples up to 200 A degrees C, physically adsorbed water was removed. On further heating in the range from 250 to 350 A degrees C in natural iron precipitates, the less stable forms (goethite, ferrihydrite, and schwertmannite) transform to more stable forms like hematite. In case of synthetic samples, the transformation runs in two steps: first in the range from 250 to 350 A degrees C, and second in the range from 600 to 750 A degrees C. TG-DTA, MS detections and XRD were used to characterize thermal behaviour of iron precipitates from acid mine drainage prepared by precipitation with urea and natural iron precipitates sampled from sludge bed (settling pit Sedem A3/4ien and old abandoned adit Hodrua, mining area Banska tiavnica, Slovakia). The high-resolution transmission electron microscopy and scanning electron microscopy (SEM) techniques were used to characterize the surface microstructure and shape of the synthesized and sampled iron precipitates. The SEM micrographs of the iron precipitates (natural and precipitated with urea) show that the samples had formed into agglomerates, probably due to attractive forces of quite large surface area. During heating of the all samples up to 200 A degrees C, physically adsorbed water was removed. On further heating in the range from 250 to 350 A degrees C in natural iron precipitates, the less stable forms (goethite, ferrihydrite, and schwertmannite) transform to more stable forms like hematite. In case of synthetic samples, the transformation runs in two steps: first in the range from 250 to 350 A degrees C, and second in the range from 600 to 750 A degrees C.
dcterms:title
Thermal behaviour of natural and synthetic iron precipitates from mine drainage Thermal behaviour of natural and synthetic iron precipitates from mine drainage
skos:prefLabel
Thermal behaviour of natural and synthetic iron precipitates from mine drainage Thermal behaviour of natural and synthetic iron precipitates from mine drainage
skos:notation
RIV/61388980:_____/14:00429128!RIV15-AV0-61388980
n4:aktivita
n16:I n16:P
n4:aktivity
I, P(7AMB12SK155)
n4:cisloPeriodika
2
n4:dodaniDat
n9:2015
n4:domaciTvurceVysledku
n7:2204606 n7:1246364 n7:4549287 n7:1698508 n7:7933665 n7:2382954
n4:druhVysledku
n18:J
n4:duvernostUdaju
n5:S
n4:entitaPredkladatele
n10:predkladatel
n4:idSjednocenehoVysledku
50303
n4:idVysledku
RIV/61388980:_____/14:00429128
n4:jazykVysledku
n15:eng
n4:klicovaSlova
Thermogravimetry; Differential thermal analysis; X-ray diffraction analysis; Acid mine drainage; Iron precipitates; Precipitation with urea
n4:klicoveSlovo
n6:Differential%20thermal%20analysis n6:Thermogravimetry n6:Precipitation%20with%20urea n6:Acid%20mine%20drainage n6:Iron%20precipitates n6:X-ray%20diffraction%20analysis
n4:kodStatuVydavatele
HU - Maďarsko
n4:kontrolniKodProRIV
[0B01974728E9]
n4:nazevZdroje
Journal of Thermal Analysis and Calorimetry
n4:obor
n17:CA
n4:pocetDomacichTvurcuVysledku
6
n4:pocetTvurcuVysledku
8
n4:projekt
n12:7AMB12SK155
n4:rokUplatneniVysledku
n9:2014
n4:svazekPeriodika
116
n4:tvurceVysledku
Murafa, Nataliya Bezdička, Petr Maříková, Monika Pulišová, Petra Večerníková, Eva Šubrt, Jan Máša, B. Michalková, E.
n4:wos
000334688900012
s:issn
1388-6150
s:numberOfPages
8
n14:doi
10.1007/s10973-014-3759-6