This HTML5 document contains 57 embedded RDF statements represented using HTML+Microdata notation.

The embedded RDF content will be recognized by any processor of HTML5 Microdata.

Namespace Prefixes

PrefixIRI
dctermshttp://purl.org/dc/terms/
n14http://localhost/temp/predkladatel/
n10http://linked.opendata.cz/resource/domain/vavai/riv/tvurce/
n8http://linked.opendata.cz/resource/domain/vavai/projekt/
n13http://linked.opendata.cz/resource/domain/vavai/subjekt/
n12http://linked.opendata.cz/ontology/domain/vavai/
n21http://linked.opendata.cz/resource/domain/vavai/zamer/
shttp://schema.org/
skoshttp://www.w3.org/2004/02/skos/core#
n4http://linked.opendata.cz/ontology/domain/vavai/riv/
n17http://bibframe.org/vocab/
n2http://linked.opendata.cz/resource/domain/vavai/vysledek/
rdfhttp://www.w3.org/1999/02/22-rdf-syntax-ns#
n5http://linked.opendata.cz/ontology/domain/vavai/riv/klicoveSlovo/
n19http://linked.opendata.cz/ontology/domain/vavai/riv/duvernostUdaju/
xsdhhttp://www.w3.org/2001/XMLSchema#
n20http://linked.opendata.cz/resource/domain/vavai/vysledek/RIV%2F61989592%3A15310%2F11%3A33142761%21RIV13-MSM-15310___/
n11http://linked.opendata.cz/ontology/domain/vavai/riv/aktivita/
n7http://linked.opendata.cz/ontology/domain/vavai/riv/jazykVysledku/
n16http://linked.opendata.cz/ontology/domain/vavai/riv/druhVysledku/
n15http://linked.opendata.cz/ontology/domain/vavai/riv/obor/
n18http://reference.data.gov.uk/id/gregorian-year/

Statements

Subject Item
n2:RIV%2F61989592%3A15310%2F11%3A33142761%21RIV13-MSM-15310___
rdf:type
skos:Concept n12:Vysledek
dcterms:description
The reaction of potassium ferrate(VI), K2FeO4, with weak-acid dissociable cyanides-namely, K2[Zn(CN)4], K2[Cd(CN)4], K2[Ni(CN)4], and K3[Cu(CN)4]-results in the formation of iron(III) oxyhydroxide nanoparticles that differ in size, crystal structure, and surface area. During cyanide oxidation and the simultaneous reduction of iron(VI), zinc(II), copper(II), and cadmium(II), metallic ions are almost completely removed from solution due to their coprecipitation with the iron(III) oxyhydroxides including 2-line ferrihydrite, 7-line ferrihydrite, and/or goethite. Based on the results of XRD, Mçssbauer and IR spectroscopies, as well as TEM, X-ray photoelectron emission spectroscopy, and Brunauer-Emmett-Teller measurements, we suggest three scavenging mechanisms for the removal of metals including their incorporation into the ferrihydrite crystal structure, the formation of a separate phase, and their adsorption onto the precipitate surface. Zn and Cu are preferentially and almost completely incorporated into the crystal structure of the iron(III) oxyhydroxides; the formation of the Cd-bearing, X-ray amorphous phase, together with Cd carbonate is the principal mechanism of Cd removal. Interestingly, Ni remains predominantly in solution due to the key role of nickel(II) carbonate, which exhibits a solubility product constant several orders of magnitude higher than the carbonates of the other metals. Traces of Ni, identified in the iron(III) precipitate, are exclusively adsorbed onto the large surface area of nanoparticles. We discuss the relationship between the crystal structure of iron(III) oxyhydroxides and the mechanism of metal removal, as well as the linear relationship observed between the rate constant and the surface area of precipitates. The reaction of potassium ferrate(VI), K2FeO4, with weak-acid dissociable cyanides-namely, K2[Zn(CN)4], K2[Cd(CN)4], K2[Ni(CN)4], and K3[Cu(CN)4]-results in the formation of iron(III) oxyhydroxide nanoparticles that differ in size, crystal structure, and surface area. During cyanide oxidation and the simultaneous reduction of iron(VI), zinc(II), copper(II), and cadmium(II), metallic ions are almost completely removed from solution due to their coprecipitation with the iron(III) oxyhydroxides including 2-line ferrihydrite, 7-line ferrihydrite, and/or goethite. Based on the results of XRD, Mçssbauer and IR spectroscopies, as well as TEM, X-ray photoelectron emission spectroscopy, and Brunauer-Emmett-Teller measurements, we suggest three scavenging mechanisms for the removal of metals including their incorporation into the ferrihydrite crystal structure, the formation of a separate phase, and their adsorption onto the precipitate surface. Zn and Cu are preferentially and almost completely incorporated into the crystal structure of the iron(III) oxyhydroxides; the formation of the Cd-bearing, X-ray amorphous phase, together with Cd carbonate is the principal mechanism of Cd removal. Interestingly, Ni remains predominantly in solution due to the key role of nickel(II) carbonate, which exhibits a solubility product constant several orders of magnitude higher than the carbonates of the other metals. Traces of Ni, identified in the iron(III) precipitate, are exclusively adsorbed onto the large surface area of nanoparticles. We discuss the relationship between the crystal structure of iron(III) oxyhydroxides and the mechanism of metal removal, as well as the linear relationship observed between the rate constant and the surface area of precipitates.
dcterms:title
Mechanisms and Efficiency of the Simultaneous Removal of Metals and Cyanides by Using Ferrate(VI): Crucial Roles of Nanocrystalline Iron(III) Oxyhydroxides and Metal Carbonates Mechanisms and Efficiency of the Simultaneous Removal of Metals and Cyanides by Using Ferrate(VI): Crucial Roles of Nanocrystalline Iron(III) Oxyhydroxides and Metal Carbonates
skos:prefLabel
Mechanisms and Efficiency of the Simultaneous Removal of Metals and Cyanides by Using Ferrate(VI): Crucial Roles of Nanocrystalline Iron(III) Oxyhydroxides and Metal Carbonates Mechanisms and Efficiency of the Simultaneous Removal of Metals and Cyanides by Using Ferrate(VI): Crucial Roles of Nanocrystalline Iron(III) Oxyhydroxides and Metal Carbonates
skos:notation
RIV/61989592:15310/11:33142761!RIV13-MSM-15310___
n12:predkladatel
n13:orjk%3A15310
n4:aktivita
n11:I n11:P n11:Z
n4:aktivity
I, P(1M0512), P(ED2.1.00/03.0058), P(KAN115600801), Z(MSM0021620855)
n4:cisloPeriodika
36
n4:dodaniDat
n18:2013
n4:domaciTvurceVysledku
n10:5207193 n10:6536328 n10:7125100 n10:9251189
n4:druhVysledku
n16:J
n4:duvernostUdaju
n19:S
n4:entitaPredkladatele
n20:predkladatel
n4:idSjednocenehoVysledku
211292
n4:idVysledku
RIV/61989592:15310/11:33142761
n4:jazykVysledku
n7:eng
n4:klicovaSlova
cyanides, iron, nanoparticles, nickel, reaction mechanisms
n4:klicoveSlovo
n5:cyanides n5:reaction%20mechanisms n5:iron n5:nickel n5:nanoparticles
n4:kodStatuVydavatele
DE - Spolková republika Německo
n4:kontrolniKodProRIV
[D2244474AFEC]
n4:nazevZdroje
Chemistry: A European Journal
n4:obor
n15:CF
n4:pocetDomacichTvurcuVysledku
4
n4:pocetTvurcuVysledku
8
n4:projekt
n8:KAN115600801 n8:ED2.1.00%2F03.0058 n8:1M0512
n4:rokUplatneniVysledku
n18:2011
n4:svazekPeriodika
17
n4:tvurceVysledku
Marušák, Zdeněk Sajdl, Petr Filip, Jan Zbořil, Radek Yngard, Ria A. Ettler, Vojtěch Sharma, Virender K. Machalová Šišková, Karolína
n4:wos
000295357800031
n4:zamer
n21:MSM0021620855
s:issn
0947-6539
s:numberOfPages
9
n17:doi
10.1002/chem.201100711
n14:organizacniJednotka
15310