HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Figures Only Full Text Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Kaczorek, D. Articles by Sommer, M. Search for Related Content PubMed PubMed Citation Articles by Kaczorek, D. Articles by Sommer, M. Agricola Articles by Kaczorek, D. Articles by Sommer, M. Related Collections Redox Processes Soil Pollution Soil Chemistry Soil Mineralogy Wetland Soils

TECHNICAL REPORTS

Heavy Metals in the Environment

Content and Binding Forms of Heavy Metals, Aluminium and Phosphorus in Bog Iron Ores from Poland

^a Dep. of Soil Environment Sciences, Agricultural Univ. of Warsaw, 02-776 Warsaw Nowoursynowska 159, Poland
^b Institute of Crop Science and Resource Conservation- Division Soil Science, Rheinische Friedrich-Wilhelms-University, 53115 Bonn, Nußallee 13, Germany
^c Leibniz-Center of Agricultural Landscape Research (ZALF) e.V., Institute of Soil Landscape Research, 15374 Müncheberg, Eberswalder Strasse 84, Germany, and Univ. of Potsdam, Institute of Geoecology, Karl-Liebknecht-Strasse 24-25, D-14476 Potsdam, Germany

^* Corresponding author (danuta_kaczorek{at}sggw.pl).

Received for publication March 13, 2008. Bog iron ores are widespread in Polish wetland soils used as meadows or pastures. They are suspected to contain high concentrations of heavy metals, which are precipitated together with Fe along a redox gradient. Therefore, soils with bog iron ore might be important sources for a heavy metal transfer from meadow plants into the food chain. However, this transfer depends on the different binding forms of heavy metals. The binding forms were quantified by sequential extraction analysis of heavy metals (Fe, Mn, Cr, Co, Ni, Cd, Pb) as well as Al and P on 13 representative samples of bog iron ores from central and southwestern Poland. Our results showed total contents of Cr, Co, Ni, Zn, Cd, and Pb not to exceed the natural values for sandy soils from Poland. Only the total Mn was slightly higher. The highest contents of all heavy metals have been obtained in iron oxide fractions V (occluded in noncrystalline and poorly crystalline Fe oxides) and VI (occluded in crystalline Fe oxides). The results show a distinct relationship between the content of Fe and the quantity of Zn and Pb as well P. Water soluble as well as plant available fractions were below the detection limit in most cases. From this we concluded bog iron ores not to be an actual, important source of heavy metals in the food chain. However, a remobilization of heavy metals might occur due to any reduction of iron oxides in bog iron ores, for example, by rising groundwater levels.