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001-es BibID:	BIBFORM094722
035-os BibID:	(Scopus)85048933744
Első szerző:	Takács Anita
Cím:	Improvement of the sequential extraction procedure based on supercritical CO2 and subcritical H2O solvents for the estimation of the environmentally mobile potentially toxic element fractions of sediments and soils / Anita Takács, Katalin Kovács, Gábor Halász, Zoltán Győri, Ilona Fekete, György Heltai, Márk Horváth
Dátum:	2018
ISSN:	0002-1873 1588-2713
Megjegyzések:	The estimation of environmental risk caused by pollution with potentially toxic elements (PTE) is usually carried out using the (3+1) step sequential extraction procedure suggested in 1993 by the Community Bureau of Reference (BCR). In the 1st step the water-soluble, exchangeable and carbonate-bound element content is extracted with acetic acid. In 2002 a fractionation procedure based on the application of supercritical CO2, subcritical H2O and of a mixture of subcritical H2O/CO2 was proposed, which allowed the water-soluble and carbonate-bound element contents to be extracted separately from sediment or soil samples weighed into the preparative column of a supercritical fluid extractor and diluted with quartz sand in a mass ratio of 1:20. The aim of the present study was to develop a new reduced-size column construction with which this dilution rate could be decreased to 1:2. A kinetic study was performed to determine the extraction time necessary for samples with different carbonate contents and the extracted element contents were compared to the results of the BCR sequential procedure on the same samples. It was established that fractionation using the reduced-size column may be a rapid way to obtain more reliable information on the easily mobilizable (water-soluble and carbonate-bound) PTE content of soils and sediments than was previously available to supplement BCR fractionation.
Tárgyszavak:	Természettudományok Környezettudományok idegen nyelvű folyóiratközlemény hazai lapban folyóiratcikk
Megjelenés:	Agrokémia és Talajtan. - 67 : 1 (2018), p. 35-48. -
További szerzők:	Kovács Katalin Halász Gábor (biokémikus) Győri Zoltán (1948-) (vegyész) Fekete Ilona Heltai György Horváth Márk
Pályázati támogatás:	OTKA 108558 OTKA
Internet cím:	DOI Intézményi repozitóriumban (DEA) tárolt változat
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