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Statements

Subject Item
n2:RIV%2F61388980%3A_____%2F07%3A00094786%21RIV08-AV0-61388980
rdf:type
skos:Concept n15:Vysledek
dcterms:description
Silně kontaminované lesní a orné půdy a říční sedimenty z Příbramska byly extrahovány deionizovanou vodou, roztokem chloridu vápenatého, dusičnanu amonného, nebo DTPA. Výsledky byly diskutovány vzhledem k termodynamické stabilitě formě kovových iontů a jejich případné resorpce na zkoumanou půdu nebo sediment. Highly polluted forest/tilled soils and stream sediments from a mining and smelting area were subjected to single-extraction procedures to determine the extractable contents of Cd, Cu, Pb, and Zn. The results obtained from four widely used operationally defined single extraction tests were compared. The analytical data were coupled with measurement of the pH and Eh in extracts, mineralogical investigations and thermodynamic modelling using the PHREEQC-2 code. The changes in the pH of the equilibrated suspensions significantly influenced the metal extractabilities, with higher values in the lower pH regions. Although the DTPA procedure generally extracted the highest amounts of metals, it was found to be unsuitable for highly organic acidic forest soils, where anionic metal–DTPA complexes are assumed to be re-adsorbed on the positively charged surfaces of soil organic matter and oxides. Highly polluted forest/tilled soils and stream sediments from a mining and smelting area were subjected to single-extraction procedures to determine the extractable contents of Cd, Cu, Pb, and Zn. The results obtained from four widely used operationally defined single extraction tests were compared. The analytical data were coupled with measurement of the pH and Eh in extracts, mineralogical investigations and thermodynamic modelling using the PHREEQC-2 code. The changes in the pH of the equilibrated suspensions significantly influenced the metal extractabilities, with higher values in the lower pH regions. Although the DTPA procedure generally extracted the highest amounts of metals, it was found to be unsuitable for highly organic acidic forest soils, where anionic metal–DTPA complexes are assumed to be re-adsorbed on the positively charged surfaces of soil organic matter and oxides.
dcterms:title
Assessment of single extractions for the determination of mobile forms of metals in highly polluted soils and sediments—Analytical and thermodynamic approaches Assessment of single extractions for the determination of mobile forms of metals in highly polluted soils and sediments—Analytical and thermodynamic approaches Posouzení jednokrokových extrakcí ke stanovení mobilních forem kovů ve vysoce znečištěných půdách a sedimentech - analytický a termodynamický přístup
skos:prefLabel
Assessment of single extractions for the determination of mobile forms of metals in highly polluted soils and sediments—Analytical and thermodynamic approaches Assessment of single extractions for the determination of mobile forms of metals in highly polluted soils and sediments—Analytical and thermodynamic approaches Posouzení jednokrokových extrakcí ke stanovení mobilních forem kovů ve vysoce znečištěných půdách a sedimentech - analytický a termodynamický přístup
skos:notation
RIV/61388980:_____/07:00094786!RIV08-AV0-61388980
n3:strany
131;140
n3:aktivita
n13:P n13:Z
n3:aktivity
P(GA526/06/0418), Z(AV0Z40320502), Z(MSM0021620855)
n3:cisloPeriodika
1
n3:dodaniDat
n4:2008
n3:domaciTvurceVysledku
n5:4208994
n3:druhVysledku
n6:J
n3:duvernostUdaju
n18:S
n3:entitaPredkladatele
n17:predkladatel
n3:idSjednocenehoVysledku
410872
n3:idVysledku
RIV/61388980:_____/07:00094786
n3:jazykVysledku
n16:eng
n3:klicovaSlova
metal; stream sediment
n3:klicoveSlovo
n11:stream%20sediment n11:metal
n3:kodStatuVydavatele
NL - Nizozemsko
n3:kontrolniKodProRIV
[90C52E7E9FBB]
n3:nazevZdroje
Analytica Chimica Acta
n3:obor
n12:CA
n3:pocetDomacichTvurcuVysledku
1
n3:pocetTvurcuVysledku
4
n3:projekt
n10:GA526%2F06%2F0418
n3:rokUplatneniVysledku
n4:2007
n3:svazekPeriodika
602
n3:tvurceVysledku
Mihaljevič, M. Grygar, Tomáš Ettler, V. Šebek, O.
n3:zamer
n8:MSM0021620855 n8:AV0Z40320502
s:issn
0003-2670
s:numberOfPages
10