Modelling retention of heavy metals in the Oostriku peat bog, Estonia: comparison of predicted and observed results
2008 (English)In: Applied Geochemistry, ISSN 0883-2927, E-ISSN 1872-9134, Vol. 23, no 6, 1498-1512 p.Article in journal (Refereed) Published
In this study, the retention of Ca and other metals (Pb, Cu, Fe, Zn and Mn) in the Oostriku peat bog (central Estonia) was modelled. Equilibrium sorption of metals on amorphous ferric oxyhydroxide and solid organic matter was simulated at steady-state. Ferric oxyhydroxide formation and possible precipitation of other metals (Mn, Pb and Cu) in the peat was also assessed. Evolution of metal sorption fronts along a peat profile over time was simulated with a dynamic model to test if metal-metal competition effects could cause Pb and Cu to sorb at higher amounts in the uppermost peat than in the lower peat, as observed in the field. The predicted sorbed amounts of metals were compared with those previously observed in the peat. In general, good agreement between both batch and dynamic model results and the independent observations at the Oostriku peat site was obtained. This suggests that the relatively simple model approach employed here might be generally useful for assessing other peat sites and similar applications.
Place, publisher, year, edition, pages
2008. Vol. 23, no 6, 1498-1512 p.
Biological materials, Calcium compounds, Copper compounds, Dynamic models
IdentifiersURN: urn:nbn:se:kth:diva-7880DOI: 10.1016/j.apgeochem.2008.01.007ISI: 000257134000008ScopusID: 2-s2.0-43949091129OAI: oai:DiVA.org:kth-7880DiVA: diva2:13038
QC 20100923. Uppdaterad från Submitted till Published (20100923).2005-10-212005-10-212010-09-23Bibliographically approved