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Cadmium, copper and zinc interactions with marine humus as a function of ligand structure.

Document Type

Article

Publication Date

1984

Abstract

The interactions in seawater of cadmium, copper, and zinc with natural levels of marine humus (fulvic and humic acids) were studied using differential pulse anodic stripping voltammetry (DPASV). Interactions with Cu were also examined by ultraviolet spectrophotometry. The degree of interaction relates to the structure of the particular fulvic or humic acid tested. Marine fulvic and humic acids with different equivalent weights and varying degrees of aromaticity and heteroatom substitution were tested to assess the relative importance of these fundamental structural features in determining the degree of interaction. An index of heteroatom substitution, derived from proton magnetic resonance spectra of these materials, when combined with equivalent weights correlated with the nature and degree of metal interaction. Both marine fulvic and humic acids appreciably interacted with Zn. In contrast, the extent of interaction of fulvic acids with Cu appears to be related to their structure while humic acids appear to interact with Cu regardless of structure. Cadmium interacts only with mature, highly crosslinked humic acids.

Comments

Abstract only. Full-text article is available only through licensed access provided by the publisher. Published in Marine Chemistry, 14, 333-346. Members of the USF System may access the full-text of the article through the authenticated link.

URI

https://login.ezproxy.lib.usf.edu/login?url=http://www.sciencedirect.com/science/article/pii/030442038490029X/pdf?md5=07ba22b46597222b664a23a83aa0f38f&pid=1-s2.0-030442038490029X-main.pdf

Language

en_US

Publisher

Elsevier

Creative Commons License

Creative Commons License
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.

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