Reductive dechlorination of chlorinated solvents in groundwater: A case study

Eric Rodriguez, Kevin A. McGuinness, Duke Ophori

Research output: Contribution to journalConference article

Abstract

An experiment was conducted, in which a carbohydrate solution (molasses) was injected into groundwater wells at a site impacted with chlorinated VOC, e.g., perchloroethylene and trichloroethylene (TCE), to create strongly anaerobic and reducing conditions that might cause Enhanced Reductive Dechlorination (ERD). Concentrations of TCE decreased in wells PTW-1, PTW-2, MW-HP-1S, and GP-104 while daughter products, primarily cis-l,2-dichloroethylene, vinyl chloride, and ethylene increased in concentration. Based on the field data and TOC results, the in-situ reactive zone had encompassed monitoring points PTW-1, PTW-2, and MW-HP-IS, and was the catalyst for the ERD of TCE. There was more evidence from the analysis of field data and biogeochemical indicators that supported the occurrence of anaerobic and reducing conditions, as well as ERD at the site. These include: low dissolved oxygen (< 1 mg/L) and REDOX (< 0 mv) concentrations, reduced nitrate and sulfate, and increased nitrite and sulfide concentrations. Methane concentrations increased continually, suggesting that the environment could have approached and achieved methanogenic conditions.

Original languageEnglish
Pages (from-to)925-926
Number of pages2
JournalACS Division of Fuel Chemistry, Preprints
Volume48
Issue number2
StatePublished - 1 Sep 2003

Fingerprint

Dechlorination
Trichloroethylene
Groundwater
Molasses
Dissolved oxygen
Carbohydrates
Volatile organic compounds
Nitrates
Ethylene
Methane
Catalysts
Monitoring
Experiments

Cite this

@article{32ab91f1194843f5ad9b7d9f733114d1,
title = "Reductive dechlorination of chlorinated solvents in groundwater: A case study",
abstract = "An experiment was conducted, in which a carbohydrate solution (molasses) was injected into groundwater wells at a site impacted with chlorinated VOC, e.g., perchloroethylene and trichloroethylene (TCE), to create strongly anaerobic and reducing conditions that might cause Enhanced Reductive Dechlorination (ERD). Concentrations of TCE decreased in wells PTW-1, PTW-2, MW-HP-1S, and GP-104 while daughter products, primarily cis-l,2-dichloroethylene, vinyl chloride, and ethylene increased in concentration. Based on the field data and TOC results, the in-situ reactive zone had encompassed monitoring points PTW-1, PTW-2, and MW-HP-IS, and was the catalyst for the ERD of TCE. There was more evidence from the analysis of field data and biogeochemical indicators that supported the occurrence of anaerobic and reducing conditions, as well as ERD at the site. These include: low dissolved oxygen (< 1 mg/L) and REDOX (< 0 mv) concentrations, reduced nitrate and sulfate, and increased nitrite and sulfide concentrations. Methane concentrations increased continually, suggesting that the environment could have approached and achieved methanogenic conditions.",
author = "Eric Rodriguez and McGuinness, {Kevin A.} and Duke Ophori",
year = "2003",
month = "9",
day = "1",
language = "English",
volume = "48",
pages = "925--926",
journal = "ACS Division of Fuel Chemistry, Preprints",
issn = "0569-3772",
number = "2",

}

Reductive dechlorination of chlorinated solvents in groundwater : A case study. / Rodriguez, Eric; McGuinness, Kevin A.; Ophori, Duke.

In: ACS Division of Fuel Chemistry, Preprints, Vol. 48, No. 2, 01.09.2003, p. 925-926.

Research output: Contribution to journalConference article

TY - JOUR

T1 - Reductive dechlorination of chlorinated solvents in groundwater

T2 - A case study

AU - Rodriguez, Eric

AU - McGuinness, Kevin A.

AU - Ophori, Duke

PY - 2003/9/1

Y1 - 2003/9/1

N2 - An experiment was conducted, in which a carbohydrate solution (molasses) was injected into groundwater wells at a site impacted with chlorinated VOC, e.g., perchloroethylene and trichloroethylene (TCE), to create strongly anaerobic and reducing conditions that might cause Enhanced Reductive Dechlorination (ERD). Concentrations of TCE decreased in wells PTW-1, PTW-2, MW-HP-1S, and GP-104 while daughter products, primarily cis-l,2-dichloroethylene, vinyl chloride, and ethylene increased in concentration. Based on the field data and TOC results, the in-situ reactive zone had encompassed monitoring points PTW-1, PTW-2, and MW-HP-IS, and was the catalyst for the ERD of TCE. There was more evidence from the analysis of field data and biogeochemical indicators that supported the occurrence of anaerobic and reducing conditions, as well as ERD at the site. These include: low dissolved oxygen (< 1 mg/L) and REDOX (< 0 mv) concentrations, reduced nitrate and sulfate, and increased nitrite and sulfide concentrations. Methane concentrations increased continually, suggesting that the environment could have approached and achieved methanogenic conditions.

AB - An experiment was conducted, in which a carbohydrate solution (molasses) was injected into groundwater wells at a site impacted with chlorinated VOC, e.g., perchloroethylene and trichloroethylene (TCE), to create strongly anaerobic and reducing conditions that might cause Enhanced Reductive Dechlorination (ERD). Concentrations of TCE decreased in wells PTW-1, PTW-2, MW-HP-1S, and GP-104 while daughter products, primarily cis-l,2-dichloroethylene, vinyl chloride, and ethylene increased in concentration. Based on the field data and TOC results, the in-situ reactive zone had encompassed monitoring points PTW-1, PTW-2, and MW-HP-IS, and was the catalyst for the ERD of TCE. There was more evidence from the analysis of field data and biogeochemical indicators that supported the occurrence of anaerobic and reducing conditions, as well as ERD at the site. These include: low dissolved oxygen (< 1 mg/L) and REDOX (< 0 mv) concentrations, reduced nitrate and sulfate, and increased nitrite and sulfide concentrations. Methane concentrations increased continually, suggesting that the environment could have approached and achieved methanogenic conditions.

UR - http://www.scopus.com/inward/record.url?scp=1042301594&partnerID=8YFLogxK

M3 - Conference article

AN - SCOPUS:1042301594

VL - 48

SP - 925

EP - 926

JO - ACS Division of Fuel Chemistry, Preprints

JF - ACS Division of Fuel Chemistry, Preprints

SN - 0569-3772

IS - 2

ER -