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Fischer, K. ; Rainer, C. ; Bieniek, D. ; Kettrup, A.

Desorption of heavy metals from typical soil components (clay, peat) with glycine.

Int. J. Environ. Anal. Chem. 46, 53-62 (1992)
DOI
Open Access Green as soon as Postprint is submitted to ZB.
Natural organic chelating agents take part in the mobilization and translocation of heavy metals in unpolluted and polluted soils. They also have to be considered as possible extracting agents for the decontamination of heavy metal polluted soils. For an assessment of the desorption capability of glycine, heavy metals (Cd, Cu, Ni, Pb, Zn) were adsorbed onto typical soil components (bentonite and peat). The metal loaded sorbents were resuspended in aqueous solutions ofglycine at pH 7.0 and 4.5 and the quantities of the desorbed metals were analysed in the liquid phase. Furthermore, the dependency of the desorption rate on the duration of experiments and the metal content were investigated. The remobilization of heavy metals from bentonite by glycine at pH 7.0 decreases following the order Cu > Ni > Zn > Cd > Pb and ranges from 95% to 9.5%. The desorption rate was significantly lower at pH 4.5 and in suspensions of peat.
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Publication type Article: Journal article
Document type Scientific Article
Keywords Bentonite ; Desorption ; Glycine ; Heavy Metals ; Peat ; Soil
ISSN (print) / ISBN 0306-7319
e-ISSN 1029-0397
Journal International Journal of Environmental Analytical Chemistry
Quellenangaben Volume: 46, Issue: 1-3, Pages: 53-62 Article Number: , Supplement: ,
Publisher Taylor & Francis
Reviewing status Peer reviewed
Institute(s) Institute of Ecological Chemistry (IOEC)