Electronic Resource
Oxford, UK
:
Blackwell Publishing Ltd
Freshwater biology
21 (1989), S. 0
ISSN:
1365-2427
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Biology
Notes:
SUMMARY. 1. Copper(II) complexation in the eutrophic. humus-rich Lake Tjeukemeer was measured fortnightly for several years by copper titration (Ion Selective Electrode) and by copper solubilization. Additionally, the copper speciation during titration was followed by ultrafiltration.2. The Tjeukemeer showed high ligand concentrations able to complex up to 8.5X10-5 M Cu.3. Scatchard plots and affinity spectra of the titration data allowed the discrimination of at least three different binding sites. In Scatchard plots log K values ranged from 5 to 9, in affinity spectra from 4.5 to 8.4. The highest log K values coincided with relatively low humus concentrations and blooms of algae, mainly Cyanobacteria.5. The ultrafiltration experiments indicated that relatively small size fractions (〈10 nm) have the highest copper binding affinity.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1365-2427.1989.tb01375.x
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