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Statements

Subject Item
n2:RIV%2F61388980%3A_____%2F03%3A50033020%21RIV%2F2004%2FAV0%2FA50004%2FN
rdf:type
skos:Concept n15:Vysledek
dcterms:description
Dissolution of aluminosilicates and Fe-oxyhydroxide minerals from granitic eluvium using bacteria of Bacillus genus was monitored with solution chemistry, granulometric and X-ray analyses as well as microscopic techniques to determine the effects of these bacteria on crystal surface and releasing mechanism of K, Si, Fe, and Al from minerals. Feldspars, quartz and micas are dominant minerals in granitic eluvium (GE). Oxyhydroxides of Fe are found in the intergranular spaces of minerals, contaminating and making most feldspar raw materials unsuitable for commercial applications. Bacteria of Bacillus spp. decrease pH of leaching medium by production of organic acids. These organic acids are directed by glycocalyx of adherent bacteria to specific sites on mineral surface (e.g. to crystal defects). The impregnated iron minerals are released by bacterial destruction of intergranular and cleavage spaces of silicate grains. This bacterial activity results in the release of Fe, Si, and K from feldspar and Fe o Dissolution of aluminosilicates and Fe-oxyhydroxide minerals from granitic eluvium using bacteria of Bacillus genus was monitored with solution chemistry, granulometric and X-ray analyses as well as microscopic techniques to determine the effects of these bacteria on crystal surface and releasing mechanism of K, Si, Fe, and Al from minerals. Feldspars, quartz and micas are dominant minerals in granitic eluvium (GE). Oxyhydroxides of Fe are found in the intergranular spaces of minerals, contaminating and making most feldspar raw materials unsuitable for commercial applications. Bacteria of Bacillus spp. decrease pH of leaching medium by production of organic acids. These organic acids are directed by glycocalyx of adherent bacteria to specific sites on mineral surface (e.g. to crystal defects). The impregnated iron minerals are released by bacterial destruction of intergranular and cleavage spaces of silicate grains. This bacterial activity results in the release of Fe, Si, and K from feldspar and Fe o
dcterms:title
The release of iron-bearing minerals and dissolution of feldspars by heterotrophic bacteria of Bacillus species. The release of iron-bearing minerals and dissolution of feldspars by heterotrophic bacteria of Bacillus species.
skos:prefLabel
The release of iron-bearing minerals and dissolution of feldspars by heterotrophic bacteria of Bacillus species. The release of iron-bearing minerals and dissolution of feldspars by heterotrophic bacteria of Bacillus species.
skos:notation
RIV/61388980:_____/03:50033020!RIV/2004/AV0/A50004/N
n3:strany
20;26
n3:aktivita
n13:Z
n3:aktivity
Z(AV0Z4032918)
n3:cisloPeriodika
1
n3:dodaniDat
n12:2004
n3:domaciTvurceVysledku
n8:7933665 n8:5758491
n3:druhVysledku
n14:J
n3:duvernostUdaju
n10:S
n3:entitaPredkladatele
n17:predkladatel
n3:idSjednocenehoVysledku
625199
n3:idVysledku
RIV/61388980:_____/03:50033020
n3:jazykVysledku
n16:eng
n3:klicovaSlova
bioleaching; feldspars; Bacillus
n3:klicoveSlovo
n9:bioleaching n9:feldspars n9:Bacillus
n3:kodStatuVydavatele
CZ - Česká republika
n3:kontrolniKodProRIV
[F1848018B366]
n3:nazevZdroje
Ceramics-Silikáty
n3:obor
n11:CA
n3:pocetDomacichTvurcuVysledku
2
n3:pocetTvurcuVysledku
5
n3:pocetUcastnikuAkce
0
n3:pocetZahranicnichUcastnikuAkce
0
n3:rokUplatneniVysledku
n12:2003
n3:svazekPeriodika
47
n3:tvurceVysledku
Štyriak, I. Hradil, David Galko, I. Bezdička, Petr Štyriaková, I.
n3:zamer
n5:AV0Z4032918
s:issn
0862-5468
s:numberOfPages
7