| Main Title |
Validation of the Hoffmann and Edwards' S(IV)-H2O2 Mechanism. |
| Author |
Overton, J. H. ;
|
| CORP Author |
Northrop Services, Inc., Research Triangle Park, NC.;Health Effects Research Lab., Research Triangle Park, NC. |
| Year Published |
1985 |
| Report Number |
EPA-68-02-4033; EPA/600/J-85/089; |
| Stock Number |
PB85-239192 |
| Additional Subjects |
Air pollution ;
Oxidation ;
Sulfur ;
Hydrogen peroxide ;
Reaction kinetics ;
pH ;
Least squares method ;
Experimental design ;
Graphs(Charts) ;
Reprints ;
Acid rain ;
Chemical reaction mechanisms ;
Hoffmann Edward's mechanism
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| NTIS |
PB85-239192 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
5p |
| Abstract |
As a result of the acid rain problem two papers have been published which report the oxidation rate of dissolved S(IV) by H2O2. The data and that of the earlier works of Hoffmann and Edwards (1975) and others represents a data base of rates that were determined in conditions of different pH's (0 to greater than 12), temperatures (7 C - 41 C) and buffer systems. Hoffmann and Edwards postulated a mechanism to explain the reaction for pH about 8. The findings of others are consistent with the mechanism in the same range. However, the data of Hoffmann and Edwards and others in the intermediate pH range exhibit the same 0.7 order relationship with (H(+1)) that was pointed out by Dasgupta (1980). The purpose of the note is to show that the rates in the intermediate pH range are consistent with the mechanism and with the postulated (Hoffmann and Edwards) first-order dependence on (H(+1)). This is demonstrated by taking into account the effects of temperature, pH, buffer system and using the method of regression for curve fitting. |
| Availability Notes |
Pub. in Atmospheric Environment 19, n4 p687-690 May 85. |
| NTIS Title Notes |
Journal article. |
| Title Annotations |
Reprint: Validation of the Hoffmann and Edwards' S(IV)-H2O2 Mechanism. |
| PUB Date Free Form |
c1985 |
| Category Codes |
7D; 68A; 99F |
| NTIS Prices |
Not available NTIS |
| Primary Description |
600/11 |
| Document Type |
NT |
| Cataloging Source |
NTIS/MT |
| Control Number |
531125246 |
| Origin |
NTIS |
| Type |
CAT |
