Viktória Kovács Kis

Publications (3)7.35 Total impact

• Article: Association of individual soil mineral constituents and heavy metals as studied by sorption experiments and analytical electron microscopy analyses.

  Péter Sipos, Tibor Németh, Viktória Kovács Kis, Ilona Mohai
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  ABSTRACT: Sorption characteristics of bulk soil samples and discrete soil mineral constituents were studied by Cu, Zn and Pb batch sorption experiments and analytical electron microscopy analyses. Copper and zinc sorbed mostly on soil mineral constituents, while lead was associated mainly to soil organic matter. Additionally, the competitive situation resulted in increase of the role of iron oxides in Pb sorption. Close association of iron oxides and silicates resulted in significant change in their sorption capacities for all the studied metals. The alkaline conditions due to the calcite content in one of the studied soil samples resulted in both increased role of precipitation for Pb and Cu and elevated sorption capacity for Cu by discrete mineral particles. Using the analytical electron microscopy analyses the sorption characteristics of metals were supported by particular data. When the methods used in this study are combined, they become an extremely powerful means of getting a deeper insight into the soil-metal interaction.
  Journal of hazardous materials 04/2009; 168(2-3):1512-20. · 4.14 Impact Factor
• Article: Sorption of copper, zinc and lead on soil mineral phases.

  Péter Sipos, Tibor Németh, Viktória Kovács Kis, Ilona Mohai
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  ABSTRACT: Soil mineral phases play a significant role in controlling heavy metal mobility in soils. The effective study of their relation needs the integrated use of several analytical methods. In this study, analytical electron microscopy analyses were combined with sequential chemical extractions on soils spiked with Cu, Zn and Pb. Our aims were to study the metal sorption capacity of soil mineral phases and the effect of presence of iron oxide and carbonate on this property of soil minerals. Copper and Pb were found to be characterized by higher and stronger sorption on the studied samples than Zn. Only the former two metals showed significant differences in their immobilized metal amounts on the studied samples and soil mineral particles. Highest metal amounts were sorbed on the swelling clay mineral particles (smectites and vermiculites), but iron-oxide phases may also have similar lead sorption capacity. Alkaline conditions due to the carbonate content of soils resulted both in increased sorption on the mineral particles for Cu and in enhanced role of precipitation for all the studied metals. On the other hand, the intimate association of phyllosilicates and iron resulted in significant increase in metal sorption capacity of the given particle. The results of sequential extractions could be successfully completed by the analytical electron microscopy analyses for studying the sorption capacity of discrete mineral particles. Their integrated use helps us in better understanding the heavy metal-mineral interactions in soils.
  Chemosphere 10/2008; 73(4):461-9. · 3.21 Impact Factor
• Article: Heavy metal retention by soil mineral phases during a potential soil contamination by sewage sludge

  Péter Sipos, Tibor Németh, Viktória Kovács Kis, Ilona Mohai
  Chinese Journal of Geochemistry 02/2006; 25:194-195.