Conditional stability constants and binding capacities for copper (II) by ultrafilterable material isolated from six surface waters of Wyoming, USA

Hydrobiologia ◽  
1989 ◽  
Vol 188-189 (1) ◽  
pp. 659-680 ◽  
Author(s):  
John P. Giesy ◽  
James J. Alberts
Keyword(s):  
Stability Constants ◽  
Surface Waters ◽  
Conditional Stability ◽  
Conditional Stability Constants

Zinc speciation in Lakes Manapouri and Hayes, New Zealand

2001 ◽  
Vol 52 (2) ◽  
pp. 217 ◽  
Author(s):  
Michael J. Ellwood ◽  
Michael J. Ellwood ◽  
Keith A. Hunter ◽  
Keith A. Hunter ◽  
Jonathan P. Kim ◽  
...  
Keyword(s):  
New Zealand ◽  
Stability Constants ◽  
Surface Waters ◽  
Zinc Concentration ◽  
Organic Ligands ◽  
Ligand Concentration ◽  
Conditional Stability ◽  
Zinc Speciation ◽  
Zinc Concentrations ◽  
Conditional Stability Constants

A study of zinc complexation in Lakes Manapouri and Hayes revealed that zinc speciation in both lakes is dominated by its complexation to natural organic ligands. In Lake Manapouri, dissolved zinc concentrations increased from 0.9 nM in surface waters to ~1.4 nM at depth. Ligand concentrations for this lake were relatively uniform with depth, with values ranging between 2.9 and 4.2 nM. A similar ligand concentration was measured for Lake Hayes, which had a surface zinc concentration of 0.46 nM. Conditional stability constants (log K) for the complexation of zinc to these ligands were high,with values ranging between 10.0 and 11.1. Calculated free Zn 2+ concentrations for both lakes were in the low picomolar range (5—48 pM). Such low free Zn 2+ levels may limit the growth of some phytoplankton in both lakes.

Effect of pH, humus concentration and molecular weight on conditional stability constants of cadmium

1988 ◽  
Vol 22 (11) ◽  
pp. 1381-1388 ◽  
Author(s):  
Jan John ◽  
Brit Salbu ◽  
Egil T. Gjessing ◽  
Helge E. Bjørnstad
Keyword(s):  
Molecular Weight ◽  
Stability Constants ◽  
Conditional Stability ◽  
Effect Of Ph ◽  
Conditional Stability Constants
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