Title: Experimental Evidence for Mobility/Immobility of Metals in Peat
Authors: NOVAKA MartinZEMANOVA LeonaVOLDRICHIVA PetraSTEPANOVA MarketaADAMOVA MariePACHEROVA PetraKOMAREK ArnostKRACHLER MICHAELPRECHOVA Eva
Citation: ENVIRONMENTAL SCIENCE & TECHNOLOGY vol. 45 no. 17 p. 7180 – 7187
Publisher: AMER CHEMICAL SOC
Publication Year: 2011
JRC N°: JRC67165
ISSN: 0013-936X
URI: http://www.ncbi.nlm.nih.gov/pubmed/21761934?dopt=Abstract
http://publications.jrc.ec.europa.eu/repository/handle/JRC67165
DOI: 10.1021/es201086v
Type: Articles in Journals
Abstract: The biogeochemical cycles of most toxic metals have been significantly altered by anthropogenic activities. Anaerobic, rain-fed organic soils are believed to record historical changes in atmospheric pollution. Suspected postdepositional mobility of trace elements, however, hinders the usefulness of peat bogs as pollution archives. To lower this uncertainty, we quantified the mobility of six trace metals in peat during an 18-month field manipulation. A replicated, reciprocal peat transplant experiment was conducted between a heavily polluted and a relatively unpolluted peatland, located 200 km apart in the Czech Republic (Central Europe). Both peatlands were Sphagnum-derived, lawn-dominated, and had water table close to the surface. A strikingly different behavior was observed for two groups of elements. Elements of group I, Fe and Mn, adjusted their abundances and vertical patterns to the host site, showing an extremely high degree of mobility. In contrast, elements of group II, Pb, Cu, Zn, and Ti, preserved their original vertical patterns at the host site, showing a high degree of immobility. Our experimental results suggest that not just lead, but also copper and zinc concentration profiles in peat are a reliable archive of temporal pollution changes within a wide pH range (2.55.8).
JRC Institute:Institute for Transuranium Elements

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