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Copper speciation and binding by organic matter in copper-contaminated streamwater

Environmental Science and Technology

By:
, , ,
DOI: 10.1021/es9601301

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Abstract

Fulvic acid binding sites (1.3-70 ??M) and EDTA (0.0017-0.18 ??M) accounted for organically bound Cu in seven stream samples measured by potentiometric titration. Cu was 84-99% organically bound in filtrates with 200 nM total Cu. Binding of Cu by EDTA was limited by competition from other trace metals. Water hardness was inversely related to properties of dissolved organic carbon (DOC) that enhance fulvic acid binding: DOC concentration, percentage of DOC that is fulvic acid, and binding sites per fulvic acid carbon. Dissolved trace metals, stabilized by organic binding, occurred at increased concentration in soft water as compared to hard water.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Copper speciation and binding by organic matter in copper-contaminated streamwater
Series title:
Environmental Science and Technology
DOI:
10.1021/es9601301
Volume
30
Issue:
12
Year Published:
1996
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Environmental Science and Technology
First page:
3477
Last page:
3486
Number of Pages:
10