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001-es BibID:	BIBFORM090106
035-os BibID:	(cikkazonosító)104029
Első szerző:	Heltai György
Cím:	Application of flexible multi-elemental ICP-OES detection in fractionation of potentially toxic element content of solid environmental samples by a sequential extraction procedure / Heltai György, Győri Zoltán, Fekete Ilona, Halász Gábor, Kovács Katalin, Takács Anita, Lamlile Khumalo, Horváth Márk
Dátum:	2019
ISSN:	0026-265X
Megjegyzések:	Remediation of areas contaminated by potentially toxic elements (PTE) requires the appropriate assessment of the environmental mobility of contaminants. The fractionation techniques developed for agrochemical and environmental purposes model the pathways of environmental mobilization mainly by sequential extraction procedures. In Europe mostly the simplified extraction scheme proposed by Community Bureau of Reference (BCR) in 1993 is widely used, why only to this certified sediment sample (BCR 701) is available, certified for fractionation of six elements (Cu, Cd, Cr, Ni, Pb, Zn). In the BCR extracts the reagent- solvents applied in leaching steps cause strong matrix interferences when for determination the PTE-contents of these solutions the multielemental capacity of inductively coupled plasma optical emission spectrometry (ICP-OES) should be utilized. Due to the different source of contamination the flexible multi-elemental ICP-OES method should be applied for analysis of the different BCR-extractant-solvent media which makes possible the reliable detection of all occurring PTE in the area. For this purpose as the most adequate solution the application of ICP-OES spectrometer with charge-coupled device (CCD)-detection was selected which is able to record the entire spectral range between 120 and 800?nm. On the basis of detailed study of BCR-solvent-matrix- and expected-analite-line interferences it was established that the sensitivities of the prominent lines of pollutant elements strongly depend on the type of extractants. For improving the accuracy of analytical results obtained for soils and environmental sediments, matrix matched calibration, internal standardization and robust plasma conditions were recommended and optimized. The successful application of this methodology is presented for a PTE-contaminated lake sediment sample and for selected typical Hungarian soil samples stored in sample bank of Hungarian Soil Protection Information and Monitoring System.
Tárgyszavak:	Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk
Megjelenés:	Microchemical Journal. - 149 (2019), p. 1-26. -
További szerzők:	Győri Zoltán (1948-) (vegyész) Fekete Ilona Halász Gábor (biokémikus) Kovács Katalin (1978-) (agrokémia) Takács Anita Khumalo, Lamlile Horváth Márk
Pályázati támogatás:	OTKA-108558 Egyéb OTKA-118101 Egyéb 1783-3/2018/FEKUTSTRAT Egyéb
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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001-es BibID:	BIBFORM067413
Első szerző:	Heltai György
Cím:	Estimation of Environmental Mobility of Potentially Toxic Elements in the Soil/Water/Sediment System Using Spectrochemical Element Detection / György Heltai, Zoltán Győri, Ilona Fekete, Gábor Halász, Katalin Kovács, Anita Takács, Norbert Boros, Márk Horváth
Dátum:	2016
ISBN:	978-963-9970-65-6
Tárgyszavak:	Műszaki tudományok Bio-, környezet- és vegyészmérnöki tudományok előadáskivonat
Megjelenés:	European Symposium on Atomic Spectrometry: ESAS 2016 & 59th Hungarian Spectrochemical Conference : book of abstracts. / ed. Mihucz, V. G. - p. 85. -
További szerzők:	Győri Zoltán (1948-) (vegyész) Fekete Ilona Halász Gábor (biokémikus) Kovács Katalin (1978-) (agrokémia) Takács Anita Boros Norbert (1977-) (agrármérnök) Horváth Márk
Internet cím:	Intézményi repozitóriumban (DEA) tárolt változat
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001-es BibID:	BIBFORM079997
Első szerző:	Kovács Katalin (agrokémia)
Cím:	Study of ultrasound-assisted sequential extraction procedure for potentially toxic element content of soils and sediments / Katalin Kovács, Gábor Halász, Anita Takács, György Heltai, Éva Széles, Zoltán Győri, Márk Horváth
Dátum:	2018
ISSN:	0026-265X
Megjegyzések:	For risk assessment of potentially toxic element (PTE) pollution of sediments and soils the fractionation by sequential extraction procedures are applied which require longtime leaching-shaking periods to achieve the dissolution equilibria. In this work an attempt is described for reduction the duration these leaching-shaking periods of the sequential extraction procedure proposed by Community Bureau of Reference (BCR) in 1993 by application of ultrasonic treatment. The fractionation of PTE content of BCR 701 certified reference sample was performed in three experiments: "A" experiment was the control, all extraction steps were performed with 16 hours shaking according to the BCR prescription; "B" experiment: in each extraction step was applied 1 hour preliminary ultrasonic treatment and after this 1 hour shaking; "C" experiment: only 1 hour ultrasonic treatment and no shaking was applied. It was experienced that by ultrasonic treatment can be efficiently increased the rate of dissolution when constant temperature of assisting medium was kept. 77% and 63% of element content extractable with the control "A" experiment can be extracted in "B" and "C" experiments, respectively. To achieve the 100% efficiency further experiments are in process.
Tárgyszavak:	Természettudományok Környezettudományok idegen nyelvű folyóiratközlemény külföldi lapban
Megjelenés:	Microchemical Journal. - 136 (2018), p. 80-84. -
További szerzők:	Halász Gábor (biokémikus) Takács Anita Heltai György Széles Éva (1979-) (vegyész) Győri Zoltán (1948-) (vegyész) Horváth Márk
Internet cím:	Intézményi repozitóriumban (DEA) tárolt változat DOI
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