THE USE OF FENTON'S REAGENT TO OXIDIZE 1,1-BIPHENYL PRODUCT AT THE BEDROCK INTERFACE AND THE SUBSEQUENT EFFECT ON BEDROCK GROUNDWATER
Since EPA Region 9 established a Preliminary Remediation Goal (PRG) for the constituent 1,1- biphenyl in October 1999, ARCADIS has been exploring methods for remediating this semi-volatile organic compound at sites that used the heat transfer product Dowtherm° A. Dowtherm° A consists of 27% biphenyl and 73% biphenyl ether, has a specific gravity of 1.050 to 1.075 at 25 degrees C, a solubility in water of 13.8 ppm at 15 degrees C, and is immiscible in water. There are two distinct source areas of Dowtherm° A at the subject site: the Dowtherm° heaters and the recirculation pump. Dowtherm° A was present as pure product in vadose zone soils prior to source removal, and residual product remains at the bedrock interface and within the highly fractured zone of within the bedrock. It exists as a dense, non-aqueous phase liquid (DNAPL) in groundwater directly beneath the source areas. Groundwater is present only in the bedrock aquifer at the recirculation pump source area; however, downgradient of the recirculation pump, the bedrock interface is found at deeper elevations and 1,1-biphenyl and biphenyl ether are detected in the saprolite aquifer at concentrations greatly exceeding 1% of the solubility. Prior to conducting the full-scale project, a treatability study was conducted to evaluate the effectiveness of three oxidizers: Fenton's reagent; hydrogen peroxide; and potassium permanganate. As a result of this study, Fenton's reagent was selected for use at the recirculation pump source area. A pilot study was also conducted using Oxygen Release Compound (ORC°) in the Dowtherm° heater area where the contaminants existed solely in the overburden.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Article Media
Document Type: Research Article
Publication date: 2002-01-01
More about this publication?
- Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed. A subscription to the Proceedings of the Water Environment Federation includes access to most papers presented at the annual WEF Technical Exhibition and Conference (WEFTEC) and other conferences held since 2000. Subscription access begins 12 months after the event and is valid for 12 months from month of purchase. A subscription to the Proceedings of the Water Environment Federation is included in Water Environment Federation (WEF) membership.
WEF Members: Sign in (right panel) with your IngentaConnect user name and password to receive complimentary access. Access begins 12 months after the conference or event
- Subscribe to this Title
- Membership Information
- About WEF Proceedings
- WEFTEC Conference Information
- Learn about the many other WEF member benefits and join today
- Ingenta Connect is not responsible for the content or availability of external websites