Trace metal speciation in natural waters: Computational vs. analytical

1996 ◽  
Vol 90 (1-2) ◽  
pp. 257-267 ◽  
Author(s):  
D. Kirk Nordstrom
Keyword(s):  
Trace Metal ◽  
Natural Waters ◽  
Metal Speciation ◽  
Trace Metal Speciation

The use of Permeation Liquid Membrane (PLM) as an analytical tool for trace metal speciation studies in natural waters

2003 ◽  
Vol 107 ◽  
pp. 1021-1024 ◽  
Author(s):  
N. Parthasarathy ◽  
M. Pelletier ◽  
J. Buffle
Keyword(s):  
Trace Metal ◽  
Natural Waters ◽  
Liquid Membrane ◽  
Metal Speciation ◽  
Analytical Tool ◽  
Trace Metal Speciation

Modelling the Trace Metal Speciation of Labile Chemical Species in Natural Waters by Electrochemical Methods

2015 ◽  
pp. 229-250
Author(s):  
Muhammad Aqeel Ashraf ◽  
Maliha Sarfraz ◽  
Rizwana Naureen ◽  
Mohamedreza Gharibreza
Keyword(s):  
Trace Metal ◽  
Natural Waters ◽  
Metal Speciation ◽  
Chemical Species ◽  
Electrochemical Methods ◽  
Trace Metal Speciation

Characterization of Organic Copper-Complexing Agents Released by Daphnia magna

1983 ◽  
Vol 40 (8) ◽  
pp. 1270-1277 ◽  
Author(s):  
William Fish ◽  
François M. M. Morel
Keyword(s):  
Trace Metal ◽  
Daphnia Magna ◽  
Stability Constants ◽  
Natural Waters ◽  
Metal Speciation ◽  
Inorganic Compounds ◽  
Toxicity Tests ◽  
Complexing Agents ◽  
Conditional Stability ◽  
Trace Metal Speciation

Zooplankton release a variety of organic and inorganic compounds into their aqueous surroundings. To test the effects of this on trace metal speciation, we raised Daphnia magna in a defined, synthetic medium at various population densities. A series of Cu(II) and pH titrations using an ion-selective electrode apparatus confirmed the excretion of moderately strong metal-binding organic compounds. Control experiments established that bacteria do not produce the complexing agents. The mean hourly excretion rate in the cultures was 40 ± 8 pmol/organism. The complexing material is characterized by two model ligands with conditional stability constants (at pH 6.30) log K1 = 8.6 and log K2 = 6.4. These stability constants are similar to those obtained for humic and fulvic acids and suggest a role for this material in the trace metal speciation of natural waters. The release of complexing agents may also affect the results of Daphnia toxicity tests by reducing metal activities during incubation.

USA - Trace metal speciation in natural waters

1997 ◽  
Vol 12 (5) ◽  
pp. iv
Author(s):  
Valerie M. Owen
Keyword(s):  
Trace Metal ◽  
Natural Waters ◽  
Metal Speciation ◽  
Trace Metal Speciation

Permeation liquid membrane for trace metal speciation in natural waters

2004 ◽  
Vol 1025 (1) ◽  
pp. 33-40 ◽  
Author(s):  
Nalini Parthasarathy ◽  
Michel Pelletier ◽  
Jacques Buffle
Keyword(s):  
Trace Metal ◽  
Natural Waters ◽  
Liquid Membrane ◽  
Metal Speciation ◽  
Trace Metal Speciation
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