Search results for: György Heltai

Items from 1 to 6 out of 6 results

article

Mobility of potentially toxic elements from the abandoned uranium mine’s spoil bank

Lamlile Khumalo, György Heltai, András Várhegyi, Márk Horváth

Ecological Chemistry and Engineering. S > 2021 > Vol. 28, nr 2 > 241--258

This study is part of the ongoing environmental monitoring program of the abandoned Mecsek uranium mine during the remediation period. During this program on the recultivated No.1 spoil bank, the radioactivity and the potentially toxic element (PTE) contents in the covering soil had shown some anomalies which refers to possible migration alongside the slope. Therefore, in a previous study, soil and...

article

Study of ultrasound-assisted sequential extraction procedure for potentially toxic element content of soils and sediments

Katalin Kovács, Gábor Halász, Anita Takács, György Heltai, more

Microchemical Journal > 2018 > 136 > C > 80-84

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...

article

Longterm study of transformation of potentially toxic element pollution in soil/water/sediment system by means of fractionation with sequential extraction procedures

György Heltai, Zoltán Győri, Ilona Fekete, Gábor Halász, more

Microchemical Journal > 2018 > 136 > C > 85-93

In first part of the paper a review is given on fractionation methodologies by sequential extraction methodologies applied for risk assessment of environmental pollution by potentially toxic elements (PTE). Main sources of PTE release are the mining-, industrial-, agri-food production-, traffic- and communal-waste. In this latter the medical and health care sources may emerge due to therapeutic and...

article

Contribution of Agricultural Field Production to Emission of Greenhouse Gases (Ghg)

Ágnes Bálint, Sándor Hoffmann, Attila Anton, Tibor Szili-Kovács, more

Ecological Chemistry and Engineering S > 2013 > 20 > 2 > 233-245

According to global inventories the agricultural field production contributes in a significant measure to increase of concentration of greenhouse gases (CO₂, N₂O, CH₄) in the atmosphere, however their estimated data of emissions of soil origin differ significantly. Particularly estimates on nitrogen-oxides emissions show a great temporal and spatial variability while their formations in microbial...

article

Sequential extraction studies on aquatic sediment and biofilm samples for the assessment of heavy metal mobility

Márk Horváth, Gábor Halász, Eva Kucanová, Beáta Kuciková, more

Microchemical Journal > 2013 > 107 > Complete > 121-125

Aquatic sediment samples and biofilms from two sampling sites representing different environmental situations (Košice, Slovakia and Gödöllő, Hungary) were studied on their heavy metal content. Fractionation of the metallic content of the samples was done by the improved three-step BCR sequential extraction procedure supplemented with microwave-assisted HNO ₃ /H ₂ O ₂ digestion...

article

Implementation of the EU Water Framework Directive in monitoring of small water bodies in Hungary, I. Establishment of surveillance monitoring system for physical and chemical characteristics for small mountain watercourses

Balázs László, Ferenc Szilágyi, Eszter Szilágyi, György Heltai, more

Microchemical Journal > 2007 > 85 > 1 > 65-71

The EU Water Framework Directives (WFD) prescribes to achieve a good status of surface waters by 2015. To keep this deadline of a new three level (surveillance, operational and investigative) monitoring system is required, including hydro-morphological, biological and chemical elements. The status of a water body should be related to the reference conditions, depending on surface water types. In Hungary,...

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Search results for: György Heltai

Mobility of potentially toxic elements from the abandoned uranium mine’s spoil bank

Study of ultrasound-assisted sequential extraction procedure for potentially toxic element content of soils and sediments

Longterm study of transformation of potentially toxic element pollution in soil/water/sediment system by means of fractionation with sequential extraction procedures

Contribution of Agricultural Field Production to Emission of Greenhouse Gases (Ghg)

Sequential extraction studies on aquatic sediment and biofilm samples for the assessment of heavy metal mobility

Implementation of the EU Water Framework Directive in monitoring of small water bodies in Hungary, I. Establishment of surveillance monitoring system for physical and chemical characteristics for small mountain watercourses

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