Conditional stability constants and binding capacities for copper (II) by dissolved organic carbon isolated from surface waters of the southeastern United States

1986 ◽  
Vol 5 (2) ◽  
pp. 139-154 ◽  
Author(s):  
John P. Giesy ◽  
James J. Alberts ◽  
David W. Evans
Keyword(s):  
United States ◽  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Stability Constants ◽  
Surface Waters ◽  
Southeastern United States ◽  
Conditional Stability ◽  
Conditional Stability Constants

scholarly journals Impact of hurricanes on the flux of rainwater and Cape Fear River water dissolved organic carbon to Long Bay, southeastern United States

2004 ◽  
Vol 18 (3) ◽  
pp. n/a-n/a ◽  
Author(s):  
G. Brooks Avery ◽  
Robert J. Kieber ◽  
Joan D. Willey ◽  
G. Christopher Shank ◽  
Robert F. Whitehead
Keyword(s):  
United States ◽  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
River Water ◽  
Southeastern United States ◽  
Long Bay ◽  
Cape Fear River ◽  
Cape Fear

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.

scholarly journals Flux and bioavailability of Cape Fear River and rainwater dissolved organic carbon to Long Bay, southeastern United States

2003 ◽  
Vol 17 (2) ◽  
pp. n/a-n/a ◽  
Author(s):  
G. B. Avery ◽  
Joan D. Willey ◽  
Robert J. Kieber ◽  
G. Christopher Shank ◽  
Robert F. Whitehead
Keyword(s):  
United States ◽  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Southeastern United States ◽  
Long Bay ◽  
Cape Fear River ◽  
Cape Fear

Hydro-Climatological Influences on Long-Term Dissolved Organic Carbon in a Mountain Stream of the Southeastern United States

2016 ◽  
Vol 45 (4) ◽  
pp. 1286-1295 ◽  
Author(s):  
Nitin K. Singh ◽  
Wilmer M. Reyes ◽  
Emily S. Bernhardt ◽  
Ruchi Bhattacharya ◽  
Judy L. Meyer ◽  
...  
Keyword(s):  
United States ◽  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Southeastern United States ◽  
Mountain Stream

scholarly journals Origin and nature of humic substances in the waters of the Amazon River Basin

1980 ◽  
Vol 10 (3) ◽  
pp. 513-526 ◽  
Author(s):  
Jerry A. Leenheer
Keyword(s):  
United States ◽  
Organic Carbon ◽  
Humic Substances ◽  
River Basin ◽  
Surface Waters ◽  
Southeastern United States ◽  
Organic Solutes ◽  
Clear Water ◽  
Black Water ◽  
Organic Solute

Abstract Humic substances dissolved in "black water, white water, and clear water" rivers of the Amazon River basin were compared were humic substances found in podzolic (spodic) and latosolic (oxic) soils of the Amaon region. Humic-type organic solutes in black water originated from organic matter decomposition and ground water drainage from podzolic soils; clear water drains from latosols because colored humic solutes are adsorbed on clay minerals contained in latosols. Comparisons of organic solute distributions in tropical surface waters versus temperate surface waters by dissolved organic carbon fractionation analysis chow that the only significant difference was a lower hydrophilic neutral content of tropical surface waters. This finding is indicative of more rapid decay processes In tropical waters. Black-water rivers of the Amazon contained cndy one-third to one-half the organic solute content contained in black-water rivers of the southeastern United States. About 50 percent of the organic carbon In black waters of the Amazon consisted of colorless non-humic organic solutes. Humic solutes contained in Amazon black water differed from humic solutes found In the Suwannee River in the southeastern United States by having a higher E4/E6 ratio in the visible absorbance spectrum which resulted in water of a more reddish coloration. Both the high E4/E6 ratio and low-angle x-ray scattering data suggest relatively small molecular dimensions for humic solutes in Amazon black water. Organic elemental analyses and infrared analysis of humic substances in Amazon waters and soils were typical for humic substances except for the low content of nitrogen for humic solutes in black water.

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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