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1

Surfactant assisted removal of Cu(II), Cd(II) and Pb(II) from contaminated soils

Ramamurthy A., Schalchian H.

Environment Protection Engineering

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2013

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Vol. 39, nr 3

87--99

EN

The study deals with the removal of residual contaminants Cu(II), Cd(II) and Pb(II) from soil using surfactants sodium dodecyl sulfate (SDS), sodium dioctyl sulfosuccinate, and Triton x-100. Surfactants were used with and without chelating agent ethylenediaminetetraacetic acid (EDTA). SDS (10 mM) was the most effective surfactant for removing metals. Replacing distilled water with SDS enhanced metal removal by the factor of 5.5, 28.8, and 29.1 for Cu(II), Cd(II), and Pb(II), respectively. SDS with EDTA was efficient in removing metals. Interaction of metal ions with respect to adsorption and desorption were also studied.

2

Advantages of lignite addition in purification process of soil polluted by heavy metals

Król-Domańska K., Smolińska B.

Biotechnology and Food Science

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2012

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Vol. 76, nr 1

51--58

EN

Environmental contamination by heavy metals represents a potential threat for plants, animal and humans. The metals do not undergo biodegradation. Many of them are soluble in water, therefore become more available for living systems and accumulate in the environment, especially in soil. This paper presents properties of brown coal (lignite) which show that this substance can be use as cheap and efficient sorbent in soil contaminated by heavy metals.

3

Accumulation of cadmium and lead in feedstuff grown on fields contaminated by industrial activities

Tlustoš P., Šichorova K., Szakova J., Balik J.

Chemia i Inżynieria Ekologiczna

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2007

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Vol. 14, nr 5-6

557-564

EN

The agricultural activities in contaminated areas are strongly limited, and crop production can be relatively easily affected by higher accumulation of contaminants in harvestable parts of biomass. In the Czech Republic, Pribram area belongs among the most contaminated ones representing contamination caused by atmospheric deposition of potentially toxic elements due to exploitation and processing of lead ores and lead production. Total soil contents of elements in the target area fluctuated within 0.2 and 7.6 mg kg-' of cadmium, and 123-2000 mg kg-1 of lead. Soil Cd pollution resulted in elevated accumulation in plants where this element was more intensively accumulated in wheat gram compared with maize one. On the contrary, lead accumulation was higher in maize kernels compare with wheat gram. Therefore, planting of maize in soils with total lead content higher than 900 mg o kg-' can lead to unacceptable risk of feedstuff contamination according to EU Directive act 32/2002.

PL

Działalność rolnicza na terenach zanieczyszczonych jest silnie ograniczana, a produkcja roślinna może być względnie łatwo podatna na większą akumulację zanieczyszczeń w zbieranych częściach biomasy. Rejon Pribram należy do najbardziej zanieczyszczonych obszarów w Republice Czeskiej, podlegających zanieczyszczeniu powodowanemu przez depozycje atmosferyczne potencjalnie toksycznych pierwiastków w wyniku eksploatacji i przeróbki rud ołowiu oraz produkcji ołowiu. Ogólna zawartość pierwiastków w glebie obszaru wokół tego obiektu waha się od 0,2 do 7,6 mg Cd kg-' i 123-2000 mg Pb kg-'. Zanieczyszczenie gleby kadmem skutkowało podwyższoną jego akumulacją w roślinach, przy czym pierwiastek ten był bardziej intensywnie akumulowany w ziarnie pszenicy niż w ziarnie kukurydzy. Przeciwnie, ołów był akumulowany w większym stopniu w ziarnie kukurydzy niż w ziarnie pszenicy. Zatem, uprawa kukurydzy na glebach o ogólnej zawartości ołowiu ponad 900 mg kg-' może prowadzić do niedopuszczalnego zanieczyszczenia paszy według Dyrektywy EU 2002/32/EC.