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Statements

Subject Item
n2:RIV%2F44555601%3A13520%2F09%3A00005141%21RIV10-MSM-13520___
rdf:type
skos:Concept n18:Vysledek
dcterms:description
Two kinds of the commercially available sorbents containing humic acids as active constituents were used for Cr(VI) reduction and removal, namely oxihumolite (naturally occurring weathered young brown coal) and iron humate (IH) (waste material produced during industrial manufacturing of humic substances). The mechanisms of the chromium removal involve the reduction of Cr(VI) (by humic substances or by Fe(II) ions) and subsequent binding of Cr(III) to a humic acid matrix. Other metal-binding mechanisms possibly effective in the process of Cr(VI) removal, e.g., coprecipitation or surface precipitation of Fe(III)/Cr(III) hydroxides, are also discussed. Oxihumolite was able to remove Cr(VI) from strongly acidic solutions with pH below ca. 2. IH, on the other hand, exhibited a maximum sorption capability in slightly acidic solutions with pH above ca. 3. Over the whole examined range (pH 1?5), however, IH was able to reduce Cr(VI) almost completely to its less toxic trivalent state. A sufficiently high sorp Two kinds of the commercially available sorbents containing humic acids as active constituents were used for Cr(VI) reduction and removal, namely oxihumolite (naturally occurring weathered young brown coal) and iron humate (IH) (waste material produced during industrial manufacturing of humic substances). The mechanisms of the chromium removal involve the reduction of Cr(VI) (by humic substances or by Fe(II) ions) and subsequent binding of Cr(III) to a humic acid matrix. Other metal-binding mechanisms possibly effective in the process of Cr(VI) removal, e.g., coprecipitation or surface precipitation of Fe(III)/Cr(III) hydroxides, are also discussed. Oxihumolite was able to remove Cr(VI) from strongly acidic solutions with pH below ca. 2. IH, on the other hand, exhibited a maximum sorption capability in slightly acidic solutions with pH above ca. 3. Over the whole examined range (pH 1?5), however, IH was able to reduce Cr(VI) almost completely to its less toxic trivalent state. A sufficiently high sorp
dcterms:title
Reduction and immobilization of hexavalent chromium with coal- and humate-based sorbents Reduction and immobilization of hexavalent chromium with coal- and humate-based sorbents
skos:prefLabel
Reduction and immobilization of hexavalent chromium with coal- and humate-based sorbents Reduction and immobilization of hexavalent chromium with coal- and humate-based sorbents
skos:notation
RIV/44555601:13520/09:00005141!RIV10-MSM-13520___
n3:aktivita
n11:P
n3:aktivity
P(1M0554)
n3:cisloPeriodika
6
n3:dodaniDat
n16:2010
n3:domaciTvurceVysledku
n4:5349710 n4:3521117
n3:druhVysledku
n13:J
n3:duvernostUdaju
n15:S
n3:entitaPredkladatele
n17:predkladatel
n3:idSjednocenehoVysledku
338445
n3:idVysledku
RIV/44555601:13520/09:00005141
n3:jazykVysledku
n9:eng
n3:klicovaSlova
Chromium(VI); Brown coal; Humic substances; Reduction; Immobilization
n3:klicoveSlovo
n10:Brown%20coal n10:Humic%20substances n10:Chromium%28VI%29 n10:Reduction n10:Immobilization
n3:kodStatuVydavatele
GB - Spojené království Velké Británie a Severního Irska
n3:kontrolniKodProRIV
[7F6AAED715FD]
n3:nazevZdroje
Chemosphere
n3:obor
n12:DJ
n3:pocetDomacichTvurcuVysledku
2
n3:pocetTvurcuVysledku
5
n3:projekt
n14:1M0554
n3:rokUplatneniVysledku
n16:2009
n3:svazekPeriodika
75
n3:tvurceVysledku
Hůla, Václav Janoš, Pavel Pilařová, Věra Bradnová, Petra Šedlbauer, Josef
n3:wos
000266145600006
s:issn
0045-6535
s:numberOfPages
7
n7:organizacniJednotka
13520