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Fractionation of iron and manganese in the horizons of a nutrient-poor forest soil profile using the sequential extraction method

100%

Walna B., Spychalski W., Ibragimow A.

Polish Journal of Environmental Studies

2010

tom 19

nr 5

Soil iron and manganese fractionation is evaluated in the soil profile sampled from a pine-covered area of Wielkopolski National Park (mid-western Poland), that for years has been exposed to acid rain. The soils studied are sands and loamy sands with a pH of 3.3-4.4. The content of iron and manganese was analyzed by sequential extraction in the following fractions: exchangeable, acid extractable, reducible, oxidizable, and residual. The soil profile displays a lithogenically dichotomous structure that is reflected in the iron and manganese content, especially in the Fe residual fraction and Mn oxidizable fraction. In terms of the lability of manganese, it can be stated that the amount of manganese in reducible fractions (Mnred) is higher than in exchangeable and acid extractable ones (except in the surface layer), while the amounts of manganese in fractions in which it is poorly available (Mnox) and unavailable (Mnres) are lower than that of Mnred. For iron, this sequence looks as follows: Feex

Distribution, bioavailability and fractionation of metallic elements in allotment garden soils using the BCR sequential extraction procedure

84%

Bielicka-Gieldon A., Rylko E., Zamojc K.

Polish Journal of Environmental Studies

2013

tom 22

nr 4

Metal associated with urban soils are of environmental concern due to their direct and indirect effects on human health. Metallic elements in contaminated soils are absorbed by plants and undergo biomagnification in the food chain. Allotment gardens are often situated in city centers and in areas with strong anthropogenic pressure – e.g. near industrial plants and roads. The aim of this study was to identify the bioavailable forms of metals present in urban soils. The sequential extraction procedure was applied to fractionate the following metals in urban soil samples from allotment gardens in Koszalin, Poland: chromium, copper, iron, manganese, nickel, lead, cadmium, and zinc. The mobility of the metals from studied soils decreased in the order: Cd > Mn > Pb > Zn > Ni > Cr > Cu > Fe. The sum of particular metals in the bioavailability fractions BCR I-III was: Cd 77-89%, Mn 72-81%, Pb 64-80%, Zn 54-77%, Ni 31-57%, Cr 32-53%, Cu 20-50%, and Fe 12-17%.

Ograniczanie wyników

2 Polish Journal of Environmental Studies

1 Bielicka-Gieldon A.

1 Ibragimow A.

1 Rylko E.

1 Spychalski W.

1 Walna B.

1 Zamojc K.

1 2013

1 2010

Wyniki wyszukiwania

Fractionation of iron and manganese in the horizons of a nutrient-poor forest soil profile using the sequential extraction method

Distribution, bioavailability and fractionation of metallic elements in allotment garden soils using the BCR sequential extraction procedure