Documentation of a multiple-technique computer program for plotting major-ion composition of natural waters

1993 ◽  
Author(s):  
L.I. Briel
Keyword(s):  
Computer Program ◽  
Natural Waters ◽  
Ion Composition ◽  
Major Ion

Factors influencing the inorganic speciation of trace metal cations in fresh waters

1999 ◽  
Vol 50 (4) ◽  
pp. 367 ◽  
Author(s):  
Jonathan P. Kim ◽  
Keith A. Hunter ◽  
Malcolm R. Reid
Keyword(s):  
Natural Waters ◽  
Major Ions ◽  
Divalent Cations ◽  
Ion Composition ◽  
High Ph ◽  
River Waters ◽  
Inorganic Complexes ◽  
Effects Of Ph ◽  
Ph Range ◽  
Inorganic Speciation

The effects of pH and major ion composition on the chemical speciation of the divalent cations of Co, Ni, Cu, Zn, Pb and Cd have been examined after consideration of the available thermodynamic database for solution complexes of these ions. Calculations were made for two model river waters representing the 1% and 99% extremes in composition of global river waters. The results show that inorganic speciation behaviour is of two characteristic types: (a) Cu, Zn and Co are dominated by bis-hydroxy- complexes at high pH and show the greatest reduction in the fraction of free aquo ion with increasing pH; (b) Pb, Ni and Cd are dominated by carbonato- complexes at high pH and show a more gradual decrease in the fraction of free aquo ion with increasing pH. For Cu, Pb and Ni significant fractions of the labile forms of these metal ions are present as inorganic complexes in the pH range of most natural waters, whereas for Zn, Co and Cd this is true only at moderately high pH (pH >7.5). Complexing with the major ions SO42– and Cl– is important only at low pH in river waters of high ionic strength.

Major ion composition of wet and dry deposition in the eastern Mediterranean basin

1995 ◽  
Vol 164 (1) ◽  
pp. 75-85 ◽  
Author(s):  
Idrees F. Al-Momani ◽  
Semra Tuncel ◽  
Ünal Eler ◽  
Erdal Örtel ◽  
Gürol Sirin ◽  
...  
Keyword(s):  
Dry Deposition ◽  
Mediterranean Basin ◽  
Eastern Mediterranean ◽  
Ion Composition ◽  
Wet And Dry Deposition ◽  
Major Ion ◽  
Eastern Mediterranean Basin

Role of sedimentation in regulating major ion composition in a softwater, seepage lake in Northern Wisconsin

1988 ◽  
Vol 23 (1) ◽  
pp. 346-350
Author(s):  
Lawrence A. Baker ◽  
Janice E. Tacconi ◽  
Patrick L. Brezonik
Keyword(s):  
Ion Composition ◽  
Major Ion ◽  
Seepage Lake

Geochemical processes affecting the major ion composition of rivers in the South Island, New Zealand

1999 ◽  
Vol 50 (7) ◽  
pp. 699 ◽  
Author(s):  
Jonathan P. Kim ◽  
Keith A. Hunter ◽  
Malcolm R. Reid
Keyword(s):  
New Zealand ◽  
River Water ◽  
Major Ions ◽  
Geochemical Processes ◽  
Ion Composition ◽  
The South ◽  
Atmospheric Input ◽  
Geochemical Model ◽  
River Waters ◽  
Major Ion

The major ion (Na+ , K+ , Mg2+ , Ca2+ , Cl− , SO42− and reactive SiO2 ) compositions of seven rivers in the South Island, New Zealand (Manuherikia, Clutha, Takaka–Cobb, Haast, Grey, Aorere and Rakaia rivers) are reported. All the rivers were pristine in comparison with global average river waters, and the concentrations of most major ions were close to the 1% percentile levels for global river water compositions. A geochemical model that attributes ion compositions to both rain input and to the weathering of various simple mineral types in the catchment was applied to these data, and to data already published. This model, although simplistic, accounts for the main features of major ion composition in the rivers studied. The dominant sources of major ions were the weathering of limestones and feldspars. Atmospheric input was relatively small except for Na+ and Cl− .

The major-ion composition of Cenozoic seawater: The past 36 million years from fluid inclusions in marine halite

2013 ◽  
Vol 313 (8) ◽  
pp. 713-775 ◽  
Author(s):  
S. T. Brennan ◽  
T. K. Lowenstein ◽  
D. I. Cendon
Keyword(s):  
Fluid Inclusions ◽  
Ion Composition ◽  
Major Ion ◽  
The Past
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