Binding of Cu(II) to the surface and exudates of the alga Dunaliella tertiolecta in seawater

M. Gonzalez-Davila, J. M. Santana-Casiano, J. Perez-Pena, Frank J Millero

Research output: Chapter in Book/Report/Conference proceedingChapter

114 Citations (Scopus)

Abstract

The adsorption process and the organic matter interaction between the marine phytoplankton specie Dunaliella tertiolecta and copper ions were investigated by differential pulse anodic stripping voltammetry. The rate of uptake was found to occur in two steps. The adsorption equilibrium data correlate well with a two-site model which considers the algal surface as one which possesses two major functional groups: high-affinity binding and low-affinity binding. The high-affinity constant was of the same order of magnitude as the complexing capacity of the exudates excreted by the algae, showing that extracellular ligands play an important role in decreasing the concentration of the free metal concentration. Changes in the temperature, salinity, and pH of the seawater solution modified both the adsorption of metal and the amount of complexed copper. -from Authors

Original languageEnglish (US)
Title of host publicationEnvironmental Science & Technology
Pages289-301
Number of pages13
Volume29
Edition2
StatePublished - 1995

Fingerprint

Algae
Seawater
alga
seawater
adsorption
Adsorption
Copper
Metals
copper
Phytoplankton
metal
Voltammetry
Biological materials
Functional groups
ligand
functional group
Ligands
phytoplankton
Ions
salinity

ASJC Scopus subject areas

  • Environmental Science(all)
  • Earth and Planetary Sciences(all)
  • Environmental Chemistry
  • Environmental Engineering

Cite this

Gonzalez-Davila, M., Santana-Casiano, J. M., Perez-Pena, J., & Millero, F. J. (1995). Binding of Cu(II) to the surface and exudates of the alga Dunaliella tertiolecta in seawater. In Environmental Science & Technology (2 ed., Vol. 29, pp. 289-301)

Binding of Cu(II) to the surface and exudates of the alga Dunaliella tertiolecta in seawater. / Gonzalez-Davila, M.; Santana-Casiano, J. M.; Perez-Pena, J.; Millero, Frank J.

Environmental Science & Technology. Vol. 29 2. ed. 1995. p. 289-301.

Research output: Chapter in Book/Report/Conference proceedingChapter

Gonzalez-Davila, M, Santana-Casiano, JM, Perez-Pena, J & Millero, FJ 1995, Binding of Cu(II) to the surface and exudates of the alga Dunaliella tertiolecta in seawater. in Environmental Science & Technology. 2 edn, vol. 29, pp. 289-301.
Gonzalez-Davila M, Santana-Casiano JM, Perez-Pena J, Millero FJ. Binding of Cu(II) to the surface and exudates of the alga Dunaliella tertiolecta in seawater. In Environmental Science & Technology. 2 ed. Vol. 29. 1995. p. 289-301
Gonzalez-Davila, M. ; Santana-Casiano, J. M. ; Perez-Pena, J. ; Millero, Frank J. / Binding of Cu(II) to the surface and exudates of the alga Dunaliella tertiolecta in seawater. Environmental Science & Technology. Vol. 29 2. ed. 1995. pp. 289-301
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