Mw. Clark et al., Selective chemical extraction and grainsize normalisation for environmental assessment of anoxic sediments: validation of an integrated procedure, SCI TOTAL E, 258(3), 2000, pp. 149-170
An integrated selective extraction and size normalisation procedure for use
in metal partitioning and diagenetic studies of anoxic sediments and soils
is presented. Data obtained by this procedure can readily be combined with
other primary data (e.g. sulfur concentrations, carbonate concentrations,
cation exchange capacity, etc.) and derived parameters (e.g, degrees of pyr
itisation and sulfidisation) that enhance interpretation of the behaviour o
f trace metals in anoxic sediments. Achieving size normalisation during ext
raction, allows direct comparison of sediments from dissimilar sedimentary
environments, and simplifies assessment of the processes that determine whe
ther a sediment is a source of or a sink for trace metals. Aspects of a stu
dy of trace metals in sediments from the Brisbane River estuary, Australia,
are used to illustrate applications of the integrated procedure. (C) 2000
Elsevier Science B.V. All rights resented.