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A field evaluation of enhanced reductive dechlorination of chlorinated solvents in groundwater,New York Metropolitan Area
Authors:Eric?Rodriguez,Kevin?A.?McGuinness,Duke?U.?Ophori  mailto:Ophorid@mail.montclair.edu"   title="  Ophorid@mail.montclair.edu"   itemprop="  email"   data-track="  click"   data-track-action="  Email author"   data-track-label="  "  >Email author
Affiliation:(1) ARCADIS G&M, 1200 MacArthur Boulevard, Mahwah, New Jersey, USA;(2) Department of Earth and Environmental Studies, Montclair State University, Upper Montclair, NJ 07043, USA
Abstract:
An initial assessment of an old manufacturing site with groundwater impacted by trichloroethene (TCE) contamination in the metropolitan New York area showed that the TCE was being removed naturally by reductive dechlorination. However, complete dechlorination was not expected at the site because the process was progressing too slowly under transitional to aerobic conditions at a degradation constant of –0.0013 and a TCE half life of 533 days. A pilot test was conducted at the site in which a carbohydrate substrate (molasses) was injected into the groundwater to create an In-Situ Reactive Zone (IRZ). Post-pilot test groundwater sampling and analysis indicated that an IRZ was created successfully as the total organic carbon (TOC) content and conductivity increased significantly while oxidation-reduction (REDOX) potential and dissolved oxygen (DO) decreased. The created IRZ caused enhanced reductive dechlorination of TCE at the site, found to proceed with a degradation constant of –0.0158 and a TCE half life of 44 days.
Keywords:Field  Experiment  Enhanced Reductive Dechlorination  Groundwater
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