Main Title |
Transformation of Carbon Tetrachloride in the Presence of Sulfide, Biotite, and Vermiculite. |
Author |
Kriegman-King, M. R. ;
Reinhard, M. ;
|
CORP Author |
Stanford Univ., CA. Dept. of Civil Engineering.;Robert S. Kerr Environmental Research Lab., Ada, OK. |
Publisher |
c1992 |
Year Published |
1992 |
Report Number |
EPA-R-816776; EPA/600/J-92/414; |
Stock Number |
PB93-135713 |
Additional Subjects |
Bioconversion ;
Water pollution effects ;
Carbon tetrachloride ;
Minerals ;
Biodeterioration ;
Water chemistry ;
Hydrogen sulfide ;
Reaction kinetics ;
Carbon dioxide ;
Carbon monoxide ;
Biotite ;
Vermiculite ;
Concentration(Composition) ;
Reprints ;
Chemical reaction mechanisms
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
NTIS |
PB93-135713 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
7p |
Abstract |
Carbon tetrachloride is transformed in aqueous solutions containing dissolved hydrogen sulfide more rapidly in the presence of the minerals biotite and vermiculite than in homogeneous systems. Approximately 80-85% of the CCl4 was transformed to CO2 via the measured intermediate, CS2. Chloroform comprised 5-15% of the products. The remaining 5% of the products were an unidentified non-volatile compound and CO. At 25C, the half-life of CCl4 with 1 mM HS was calculated to be 2600, 160, and 50 days for the homogeneous, vermiculite (114 sq m/L), and biotite (55.8 sq m/L) systems, respectively. The CCl4 transformation rate was found to be dependent on the type and quantity of the solid and the temperature, but was independent of pH and HS(-) concentration above a critical HS(-) concentration. The activation energies (+ or - 95% confidence intervals) were determined to be 122 + or - 32, 91.3 + or - 8.4, and 59.9 + or - 13.3 kJ/mol for the homogeneous, vermiculite, and biotite systems, respectively. The CCl4 transformation rate exhibited first-order behavior with respect to biotite surface area concentration SC(sub biotite) below 55.8 sq m/L. The rate of CCl4 transformation was independent of HS(-) concentration when (HS(-)) = 0.5-4 mM and SC(sub biotite) = 55.8 sq m/L. Below (HS(-)) = 0.5-4 mM, the rate law was dependent on HS(-) concentration. (Copyright (c) 1992 American Chemical Society.) |
Supplementary Notes |
Pub. in Environmental Science Technology, v26 n11 p2198-2206 1992. See also PB92-179738. Sponsored by Robert S. Kerr Environmental Research Lab., Ada, OK. |
NTIS Title Notes |
Journal article. |
Title Annotations |
Reprint: Transformation of Carbon Tetrachloride in the Presence of Sulfide, Biotite, and Vermiculite. |
Category Codes |
68D; 48G; 57K; 57B; 99F |
NTIS Prices |
PC A02/MF A01 |
Primary Description |
600/15 |
Document Type |
NT |
Cataloging Source |
NTIS/MT |
Control Number |
305028243 |
Origin |
NTIS |
Type |
CAT |