| Main Title |
Effects of Humic Substances on Metal Speciation. |
| Author |
Perdue, E. M. ;
|
| CORP Author |
Georgia Inst. of Tech., Atlanta. School of Geophysical Sciences.;Environmental Research Lab., Athens, GA. |
| Year Published |
1987 |
| Report Number |
EPA/600/D-87/351; |
| Stock Number |
PB88-133632 |
| Additional Subjects |
Water treatment ;
Metal complexes ;
Humic acids ;
Ligands ;
Equilibrium ;
Concentration(Composition) ;
Metal ions
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| NTIS |
PB88-133632 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
28p |
| Abstract |
The paper addresses some of the problems that must be understood and solved before the effects of metal-humic complexation on water treatment processes can be quantitatively addressed. The heterogeniety of ligands in a humic substance not only complicates the mathematical description of equilibrium data but also makes the complexation capacity of a humic substance almost impossible to accurately determine. Complexation capacities (meq/g) of humic substances are widely reported to vary with pH, ionic strength, concentration of the humic substances used in the measurement, and the nature of the metal being studied. The paper demonstrates that the reported effect of humic substance concentration on complexation capacity is an artifact, and that other effects arise from variations in conditional concentration quotients for metal complexation reactions. |
| Supplementary Notes |
Sponsored by Environmental Research Lab., Athens, GA. |
| PUB Date Free Form |
Dec 87 |
| Category Codes |
68D; 99A |
| NTIS Prices |
PC A03/MF A01 |
| Primary Description |
600/01 |
| Document Type |
NT |
| Cataloging Source |
NTIS/MT |
| Control Number |
805619666 |
| Origin |
NTIS |
| Type |
CAT |
