| Main Title |
Photochemistry of Aqueous Iron(III)-Polycarboxylate Complexes: Roles in the Chemistry of Atmospheric and Surface Waters. |
| Author |
Faust, B. C. ;
Zepp, R. G. ;
|
| CORP Author |
Environmental Research Lab., Athens, GA. ;Duke Univ., Durham, NC. School of the Environment. |
| Publisher |
1993 |
| Year Published |
1993 |
| Report Number |
EPA/600/J-93/520; |
| Stock Number |
PB94-135050 |
| Additional Subjects |
Photochemical reactions ;
Iron ;
Atmospheric chemistry ;
Water pollution ;
Surface waters ;
Redox reactions ;
Photolysis ;
Iron complexes ;
Quantum efficiency ;
Global aspects ;
Carbon dioxide ;
Radicals ;
Reprints ;
Atmospheric waters ;
Iron-polycarboxylate complexes ;
DOC(Dissolved Organic Carbon)
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| NTIS |
PB94-135050 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
8p |
| Abstract |
Photochemical redox reactions of Fe(III) complexes of polycarboxylates (e.g., citrate, malonate, oxalate) occur on time scales of minutes in sunlight and are potentially important sources of Fe(II), O2-/HO2, H2O2, and OH in atmospheric water drops and surface waters. Quantum yields for Fe(II) formation, determined from experiments and equilibrium speciation calculations, are (1) 0.28 for Fe(OH) (citrate)-at 436 nm, (2) 0.027 for Fe(malonate)2- at 366 nm, and (3) 1.0 for Fe(oxalate)3 at 436 nm. Competitive reactions of O2 and Fe(III) with the polycarboxylate radicals and/or the carbon-centered radicals derived from decarboxylation, as well as speciation of Fe(II) and Fe(III), affect the experimental quantum yields of Fe(I) formation. |
| Supplementary Notes |
Pub. in Environmental Science and Technology, v27 n12 p2517-2521 1993. Prepared in cooperation with Duke Univ., Durham, NC. School of the Environment. |
| NTIS Title Notes |
Journal article. |
| Title Annotations |
Reprint: Photochemistry of Aqueous Iron(III)-Polycarboxylate Complexes: Roles in the Chemistry of Atmospheric and Surface Waters. |
| Category Codes |
68A; 68D; 99E; 99F; 47C |
| NTIS Prices |
PC A02/MF A01 |
| Primary Description |
600/01 |
| Document Type |
NT |
| Cataloging Source |
NTIS/MT |
| Control Number |
407718947 |
| Origin |
NTIS |
| Type |
CAT |
