A comparison of two methods for determining copper partitioning in oxidized sediments

Marine Chemistry



Model estimations of the proportion of Cu in oxidized sediments associated with extractable organic materials show some agreement with the proportion of Cu extracted from those sediments with ammonium hydroxide. Data were from 17 estuaries of widely differing sediment chemistry. The modelling and extraction methods agreed best where concentrations of organic materials were either in very high concentrations, relative to other sediment components, or in very low concentrations. In the range of component concentrations where the model predicted Cu should be distributed among a variety of components, agreement between the methods was poor. Both approaches indicated that Cu was predominantly partitioned to organic materials in some sediments, and predominantly partitioned to other components (most probably iron oxides and manganese oxides) in other sediments, and that these differences were related to the relative abundances of the specific components in the sediment. Although the results of the two methods of estimating Cu partitioning to organics correlated significantly among 24 stations from the 17 estuaries, the variability in the relationship suggested refinement of parameter values and verification of some important assumptions were essential to the further development of a reasonable model. 

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title A comparison of two methods for determining copper partitioning in oxidized sediments
Series title Marine Chemistry
DOI 10.1016/0304-4203(86)90065-4
Volume 20
Issue 1
Year Published 1986
Language English
Publisher Elsevier
Contributing office(s) San Francisco Bay-Delta, Toxic Substances Hydrology Program, Pacific Regional Director's Office
Description 15 p.
First page 45
Last page 59
Online Only (Y/N) N
Additional Online Files (Y/N) N
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