Accumulation rates of airborne heavy metals in wetlands

Auteurs :
SOUCH, C.J.
FILIPPELLI, G.M.
DOLLAR, N.
PERKINS, S.
MASTALERZ, M.

Description :
Accumulation rates of heavy metals (Cd, Cr, Cu, Mn, Pb, and Zn) retained in wetland sediments in northwest Indiana, downwind of the Chicago-Gary-Hammond industrial area, are quantified to assess anthropogenic influences on atmospheric fluxes. Metal concentrations for 22 sediment cores are determined by ICP-AES after ashing and strong acid extraction. Relations between organic content and metal concentrations at depth are used to separate natural and anthropogenic sources. The results provide important information on the effect of different management regimes, specifically drainage, and on the retention of heavy metals.


Type de document :
Article de périodique

Source :
Physical geography, issn : 0272-3646, 2002, vol. 23, n°. 1, p. 21-43, nombre de pages : 23, Collation : Illustration, Références bibliographiques : 57 ref.

Date :
2002

Editeur :
Pays édition : Royaume-Uni, Abingdon, Taylor and Francis