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Original scientific article

CHEMICAL LEACHING OF CONTAMINATED SOIL – CASE STUDY

By
Zuzana Danková ,
Zuzana Danková
Contact Zuzana Danková

State Geological Institute of Dionýz Štúr, Regional Centre Košice, Slovakia

Iveta Štyriaková ,
Iveta Štyriaková

State Geological Institute of Dionýz Štúr, Regional Centre Košice, Slovakia

Ľubica Kovaničová ,
Ľubica Kovaničová

State Geological Institute of Dionýz Štúr, Regional Centre Košice, Slovakia

Katarína Čechovská ,
Katarína Čechovská

State Geological Institute of Dionýz Štúr, Regional Centre Košice, Slovakia

Marián Košuth ,
Marián Košuth

State Geological Institute of Dionýz Štúr, Regional Centre Košice, Slovakia

Jaroslav Šuba ,
Jaroslav Šuba

State Geological Institute of Dionýz Štúr, Regional Centre Košice, Slovakia

Jarmila Nováková ,
Jarmila Nováková

State Geological Institute of Dionýz Štúr, Regional Centre Spišská Nová Ves, Division of Geoanalytical Laboratories, Slovakia

Patrik Konečný ,
Patrik Konečný

State Geological Institute of Dionýz Štúr, Department of Special Laboratories, Slovakia

Ľubomír Tuček ,
Ľubomír Tuček

State Geological Institute of Dionýz Štúr, Regional Centre Košice, Slovakia

Katarína Žecová ,
Katarína Žecová

State Geological Institute of Dionýz Štúr, Regional Centre Košice, Slovakia

Eva Lenhardtová ,
Eva Lenhardtová

State Geological Institute of Dionýz Štúr, Regional Centre Košice, Slovakia

Zoltán Németh
Zoltán Németh

State Geological Institute of Dionýz Štúr, Regional Centre Košice, Slovakia

Abstract

This study presents results of chemical leaching of contaminated soil from several metallurgically loaded locality of Richnava in Slovakia, applying two chelants – Na2EDTA and Na3EDDS of different molar concentration, done at different leaching conditions. The lower molar concentration (2 mM) of chelants showed comparable effect on Mn, Ni, As, Sb and Co leaching. Higher extraction was revealed at application of 10 mM chelants, especially for Cu and Cd release. Repeated washing of soil by 10 mM chelant without the media regeneration was more effective at the toxic elements removal than washing by smaller volumes of media or leaching of soil in static conditions. Final experiments focused on obtained leachates treatment showed that electrolysis and precipitation should represent a perspective way of the washing media regeneration.

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. 

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