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Pond sediments as historical record of heavy metals fallout

โœ Scribed by M. Thomas; D. Petit; L. Lamberts

Book ID
104655120
Publisher
Springer Netherlands
Year
1984
Tongue
English
Weight
446 KB
Volume
23
Category
Article
ISSN
0049-6979

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โœฆ Synopsis

Well preserved pond sediments were dated as a function of depth by the Pb-210 geochronological method for the past 100 yr. The results have been checked with Cs-137 analysis for the last 30 yr. Mineralogical composition is very constant along the sediment core indicating mechanical erosion of local outcrops as bulk sediment origin. The contents of A1, Cu, Pb, Zn, Cd, and As have been determined and enrichment factors normalized to A1 value were calculated. Copper is mainly of natural origin, and As is influenced by local agricultural use. The anthropogenic source ofPb, Zn, and Cd is clearly provided by atmospheric fallout which is supported by comparison with atmospheric fluxes for wet and dry deposition.

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