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Potentiometric determination of copper complexation by phytoplankton exudates 1
Author(s) -
Swallow K. C.,
Westall J. C.,
McKnight D. M.,
Morel N. M. L.,
Morel F. M. M.
Publication year - 1978
Publication title -
limnology and oceanography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.7
H-Index - 197
eISSN - 1939-5590
pISSN - 0024-3590
DOI - 10.4319/lo.1978.23.3.0538
Subject(s) - potentiometric titration , thalassiosira pseudonana , copper , phytoplankton , chlorophyceae , chlamydomonas , chemistry , botany , environmental chemistry , nuclear chemistry , algae , chlorophyta , biology , ion , biochemistry , organic chemistry , nutrient , mutant , gene
Potentiometric copper titrations were done on culture media in which eight algal species, Thalassiosira pseudonana (3H), Ankistrodesmus falcatus, Chlamydomonas sp., Pediastrum sp., Staurastrum gracile, Gloeocystis gigas, Tribonema sp., and Cyclotella cryptica were grown to cell concentrations of 10 5 –10 6 cells · ml −1 . The results demonstrate that only G. gigas produces extracellular organic compounds that can measurably reduce the cupric ion activity in 1 × 10 −6 M total copper.