Environmental Evaluation of a Local Lake Chain Affected by Wastewater by Means of Spectrochemical Analytical Methods

Heltai, György; Fekete, Ilona; Percsich, K.; Flórián, K.; Tarr, Zs.

doi:10.1006/mchj.1998.1574

Cited by 11 publications

(7 citation statements)

References 3 publications

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“…A comparison of the fractionation results for the BCR CRM-701 and Gödöllő lake sediment samples, showed that both samples contained significant amounts of PTEs in all fractions and that the distribution of individual elements between the fractions gave a clear reflection of the origin of the contamination (HELTAI et al, 1998). It can be seen that the most easily mobilized 1st fraction contained PTE amounts of the same order of magnitude in both samples with the exception of copper.…”

Section: Comparison Of Fractionation Results Obtained Using the Bcr Amentioning

confidence: 93%

“…• A sediment sample from a fish pond chain constructed on the Rákos Creek between Gödöllő and Isaszeg (HELTAI et al, 1998).…”

Section: Methodsmentioning

confidence: 99%

“…Sequential extraction procedures proved to be useful for estimating the mobility and toxicity of PTEs and their temporal changes in various environmental matrices (FIEDLER et al, 1994). The (3+1) step sequential extraction procedure suggested by the Community Bureau of Reference (BCR) in 1993 (URE et al, 1993;LÓPEZ-SÁNCHEZ et al, 1998;RAURET et al, 1999;ONDOÑO et al, 2017) has been used by the authors for two decades (HELTAI et al, 1998). Simultaneously, however, a supplementary alternative method was developed by which the species can be preserved intact (PUEYO et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

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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

Takács

Kovács

Halasz

et al. 2018

Agrokem

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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 CO 2 , subcritical H 2 O and of a mixture of subcritical H 2 O/CO 2 was proposed, which allowed the water-soluble and carbonatebound 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 (watersoluble and carbonate-bound) PTE content of soils and sediments than was previously available to supplement BCR fractionation.

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Section: Comparison Of Fractionation Results Obtained Using the Bcr Amentioning

confidence: 93%

“…• A sediment sample from a fish pond chain constructed on the Rákos Creek between Gödöllő and Isaszeg (HELTAI et al, 1998).…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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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

Takács

Kovács

Halasz

et al. 2018

Agrokem

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“…A BCR szekvens extrakció alkalmazását már a 90-es évek közepén megkezdtük a Gödöllő-Isaszeg közötti tórendszer üledékének vizsgálatára. Az akkor rendelkezésre álló módszerek és szabványok szerint a minták teljesen feltárható elemtartalmát HNO3/H2O2 mikrohullámú feltárással határoztuk meg (MSZ 318/10-23:1985;MSZ 21470-50: 1998;HELTAI et al, 1998). Az eredmények összehasonlíthatósága végett a BCR extrakció során a reziduális és az összes oldható elemtartalmak meghatározására szintén ezt a feltárási módszert alkalmaztuk.…”

Section: Bevezetésunclassified

A BCR frakcionálási módszer kritikai vizsgálata a BCR-701 tanúsított anyagminta segítségével

Fekete¹,

Heltai²,

Bezúr³

et al. 2022

JCEGI

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Kutatásunkban a potenciálisan toxikus elemszennyezés által okozott környezeti kockázat becslésére alkalmazott, az EU Community Bureau of Reference (BCR) által 1993-ban ajánlott 3+1 lépéses extrakcióval végzett frakcionálás kritikai értékelésével foglalkoztunk, az elemdetektálásra korábban optimalizált multielemes ICP-OES kalibrációt alkalmazva. Munkánk fő célja a HNO3/H2O2 eleggyel végzett mikrohullámú feltárás, továbbá a királyvízzel végzett mikrohullámú feltárás és a királyvízzel visszafolyós hűtős extraktorral végzett feltárás alkalmazhatóságának összehasonlítása a reziduális és pszeudototál frakciók meghatározása során. Vizsgálataink eredményei alapján azt tapasztaltuk, hogy mind a BCR1-4 frakció összegénél, mind az összes kioldásnál a koncentrációk a visszafolyós hűtős királyvizes extrakció esetében a legnagyobbak, a mikrohullámmal támogatott királyvíz és a mikrohullámmal támogatott salétromsav/hidrogén-peroxid kivonás közel azonos hatásfokú. Tehát a salétromsav/hidrogén-peroxid mikrohullámú feltárás továbbra is alkalmazható, s különösen javasolt abban az esetben, ha a királyvíz a mátrix zavaró hatásának felerősödését okozná a mérés során.

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“…A new sequential extraction procedure was based on the application of CO 2 , H 2 O, and (H 2 O+CO 2 ), in this order, as solvents in a supercritical fluid extractor (SFE) ( Table 3) [10]. The method was tested on polluted lake sediments [11] with high organic matter content (8-30%) and on a soil standard reference material certified for total heavy metal content. The efficiency of single-step extractions with water under different conditions (cold water leaching, continuous hot water percolation, and water under subcritical conditions (27 MPa pressure at 70°C in SFE), and with supercritical CO 2 and subcritical mixtures of CO 2 and H 2 O was compared with that of HNO 3 -H 2 O 2 digestion-extraction.…”

Section: Introductionmentioning

confidence: 99%

Application of sequential extraction with supercritical CO2, subcritical H2O, and an H2O/CO2 mixture for estimation of environmentally mobile heavy metal fractions in sediments

et al. 2002

Self Cite

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Results from use of a new isolation procedure based on sequential extraction with supercritical CO(2), subcritical H(2)O, and an H(2)O/CO(2) mixture in the same supercritical fluid extractor have been compared with results from the BCR-recommended three-step sequential extraction procedure. The new procedure gives more detailed information about environmentally mobile fractions (water-soluble, bicarbonate-forming), and in less time (5-6 h), than the BCR procedure.

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Environmental Evaluation of a Local Lake Chain Affected by Wastewater by Means of Spectrochemical Analytical Methods

Cited by 11 publications

References 3 publications

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

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

A BCR frakcionálási módszer kritikai vizsgálata a BCR-701 tanúsított anyagminta segítségével

Application of sequential extraction with supercritical CO2, subcritical H2O, and an H2O/CO2 mixture for estimation of environmentally mobile heavy metal fractions in sediments

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