Main Title |
Chromate Reduction and Remediation Utilizing the Thermodynamic Instability of Zero-Valence State Iron. |
Author |
Powell, R. M. ;
Puls, R. W. ;
Paul., C. J. ;
|
CORP Author |
ManTech Environmental Technology, Inc., Ada, OK.;Robert S. Kerr Environmental Research Lab., Ada, OK. |
Publisher |
c1994 |
Year Published |
1994 |
Report Number |
EPA-68-C3-0322; EPA/600/A-94/070; |
Stock Number |
PB94-163516 |
Additional Subjects |
Water pollution ;
Metals ;
Oxidation reduction reactions ;
Reaction kinetics ;
Ground water ;
Thermodynamic properties ;
Chromates ;
Iron ;
Inorganic compounds ;
Technology innovation ;
Chemical reactors ;
Columns(Process engineering) ;
Toxic substances ;
Reprint ;
Site Remediation Technology ;
SBR(Stirred Batch Reactors) ;
Zero-valent iron
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
NTIS |
PB94-163516 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
14p |
Abstract |
The study examines the reaction kinetics for redox potential change and chromate reduction in stirred batch reactor systems (SBRs) containing a simulated groundwater in the presence and absence of natural aquifer material, using iron filings as the zero-oxidation state chemical. Column experiments were also utilized to evaluate reductive capacity and the potential for chromate breakthrough. Continuous tracking of the system chemistry, including redox potential, pH, and the concentrations of the chemical species of interest was performed for both types of experiments. Mathematical evaluations of the rates of changes in the SBRs were performed to determine the pseudo-reaction orders with respect to the electron, (measured as redox, or Eh) and chromate, as well as the reaction rates. Results indicate rapid changes in Eh from positive to highly negative values upon introduction of Fe metal to these systems, both in the presence and absence of aquifer material. (Copyright (c) Water Environment Federation 1994.) |
Supplementary Notes |
Pub. in Proceedings of the Water Environment Federation Conference on Innovative Solutions for Contaminated Site Management, Miami, FL, March 6-9, 1994, p485-495. See also DE84015123, PB92-114461, and PB93-131480. Sponsored by Robert S. Kerr Environmental Research Lab., Ada, OK. |
Title Annotations |
Reprint: Chromate Reduction and Remediation Utilizing the Thermodynamic Instability of Zero-Valence State Iron. |
Category Codes |
68D; 99B; 99F |
NTIS Prices |
PC A03/MF A01 |
Primary Description |
600/15 |
Document Type |
NT |
Cataloging Source |
NTIS/MT |
Control Number |
416823174 |
Origin |
NTIS |
Type |
CAT |