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Statements

Subject Item
n2:RIV%2F00027006%3A_____%2F04%3A676%21RIV08-MZE-00027006
rdf:type
skos:Concept n17:Vysledek
dcterms:description
The complexation and mobilization potential of Pb and Zn by humic acids (HA) from soil and brown coal was tested in soils from long-term contaminated and non-contaminated sites close to a lead smelter. The molecular weight distribution of HA was evaluated by HPLC-SEC. HA from Leonardite showed a lower apparent molecular weight (MW) in comparison to HA extracted from arable and grassland soils. The capacity of heavy metal complexation by HA fractions of different molecular weights was evaluated by means of coupled ICP-AES-SEC. HA originating from brown coal complexed Zn better than the autoctonous HA. Molecular weights fractions relevant for metal-complexing were found in the range of 2.5-5.0 kDa where HA of brown coal exhibited their major binding capacity. HA of grassland soil moderately complexed Zn, whereas HA of the arable contaminated soil showed only a small ability to complex Zn. HA strongly complexed Pb, particularly the HA of grassland soil whose complexing ability exceeded even that of bro Potenciál komplexace a mobilizece Pb a Zn huminovými kyselinami (HA) pocházejícími z půdy a hnědého uhlí (oxyhumolity) byl testován na nekontaminovaných a dlouhodobě kontaminovaných půdách z blízkosti kovohutě zpracovávající olovo. Distribuce molekulových hmotností HA byla stanovena HPLC-SEC. HA z oxyhumolitů měla evidentně nižší molekulové hmotnosti (MW) ve srovnání s HA extrahovanou z trvale zatravněných a orných půd. Schopnost komplexace kovů huminovými kyselinami o různých molekulových hmotnostech byla stanovena sdruženou metodou ICP-AES-SEC. HA pocházející z oxyhumolitu komplexovaly Zn lépe než původní HA nacházející se v půdách. Molekulové frakce, které nejvíce komplexovaly kovy se pohybovaly v rozsahu 2.5-5.0 kDa. Ha pocházející ze zatravněných půd komplexovaly Zn ve střední míře, zatímco HA z orných půd měly pouze malou schopnost komplexovat Zn. Huminové kyseliny významně komplexovaly Pb, zvláště Ha pocházející ze zatravněných půd, které přesáhly i komplexační schopnosti z hnědého uhlí. Pro z The complexation and mobilization potential of Pb and Zn by humic acids (HA) from soil and brown coal was tested in soils from long-term contaminated and non-contaminated sites close to a lead smelter. The molecular weight distribution of HA was evaluated by HPLC-SEC. HA from Leonardite showed a lower apparent molecular weight (MW) in comparison to HA extracted from arable and grassland soils. The capacity of heavy metal complexation by HA fractions of different molecular weights was evaluated by means of coupled ICP-AES-SEC. HA originating from brown coal complexed Zn better than the autoctonous HA. Molecular weights fractions relevant for metal-complexing were found in the range of 2.5-5.0 kDa where HA of brown coal exhibited their major binding capacity. HA of grassland soil moderately complexed Zn, whereas HA of the arable contaminated soil showed only a small ability to complex Zn. HA strongly complexed Pb, particularly the HA of grassland soil whose complexing ability exceeded even that of bro
dcterms:title
Coupled ICP-AES-SEC study of Pb and Zn complexation in long-term contaminated soil Coupled ICP-AES-SEC study of Pb and Zn complexation in long-term contaminated soil Sdružená ICP-AES-SEC studie komplexace Pb a Zn v dlouhodobě kontaminovaných půdách
skos:prefLabel
Coupled ICP-AES-SEC study of Pb and Zn complexation in long-term contaminated soil Sdružená ICP-AES-SEC studie komplexace Pb a Zn v dlouhodobě kontaminovaných půdách Coupled ICP-AES-SEC study of Pb and Zn complexation in long-term contaminated soil
skos:notation
RIV/00027006:_____/04:676!RIV08-MZE-00027006
n3:strany
0;0
n3:aktivita
n13:P
n3:aktivity
P(QD1256)
n3:dodaniDat
n4:2008
n3:domaciTvurceVysledku
n12:6235255
n3:druhVysledku
n19:D
n3:duvernostUdaju
n8:S
n3:entitaPredkladatele
n11:predkladatel
n3:idSjednocenehoVysledku
558928
n3:idVysledku
RIV/00027006:_____/04:676
n3:jazykVysledku
n18:eng
n3:klicovaSlova
heavy metals; microbial biomass; respiratory activity; humic acids; HPLC-SEC
n3:klicoveSlovo
n6:microbial%20biomass n6:HPLC-SEC n6:respiratory%20activity n6:humic%20acids n6:heavy%20metals
n3:kontrolniKodProRIV
[23747F57E065]
n3:mistoKonaniAkce
Freiburg, Germany
n3:mistoVydani
Freiburg, Germany
n3:nazevZdroje
EUROSOIL 2004
n3:obor
n16:DK
n3:pocetDomacichTvurcuVysledku
1
n3:pocetTvurcuVysledku
3
n3:projekt
n9:QD1256
n3:rokUplatneniVysledku
n4:2004
n3:tvurceVysledku
De Nobili, M. Contin, M. Mühlbachová, Gabriela
n3:typAkce
n15:WRD
n3:zahajeniAkce
2004-09-04+02:00
s:numberOfPages
1
n14:hasPublisher
Albert-Ludwigs-Universitat Freiburg, Germany