D-Area Sulfate Reduction DIW-1 Organic Application Field Study

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An acidic/metals/sulfate, groundwater contaminant plume emanates from the diarrhea Coal Pile Runoff Basin (DCPRB) at the Savannah River Site (SRS), due to the contaminated runoff the basin receives from the D-Area coal pile. From a previous feasibility evaluation and laboratory testing, it was concluded that the plume could be remediated with sulfate reduction remediation combined with monitored natural attenuation (MNA). Additionally these previous studies recommended that soybean oil and sodium lactate be utilized as organic substrates for sulfate reducing bacteria (SRB) during a subsequent sulfate reduction, pilot scale, field demonstration. The soybean oil was to be tested as a long-term, ... continued below

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Phifer, M.A. January 12, 2003.

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Description

An acidic/metals/sulfate, groundwater contaminant plume emanates from the diarrhea Coal Pile Runoff Basin (DCPRB) at the Savannah River Site (SRS), due to the contaminated runoff the basin receives from the D-Area coal pile. From a previous feasibility evaluation and laboratory testing, it was concluded that the plume could be remediated with sulfate reduction remediation combined with monitored natural attenuation (MNA). Additionally these previous studies recommended that soybean oil and sodium lactate be utilized as organic substrates for sulfate reducing bacteria (SRB) during a subsequent sulfate reduction, pilot scale, field demonstration. The soybean oil was to be tested as a long-term, slow release, organic substrate, and the sodium lactate was to be tested as a short-term, immediately available, organic substrate. The subsequent sulfate reduction, pilot scale, field demonstration consisted of the following: (1) Approximately 825 gallons of soybean oil was injected into both the south and north wings of the existing D-Area interceptor well. (2) Approximately 227.5 gallons of sodium lactate and 1169 gallons of groundwater from a background well were injected into the south wing only. The groundwater was used to reduce the viscosity of the sodium lactate for injection, to flush the sodium lactate out of the injection point screen zones, and to provide bioaugmentation (i.e. the addition of SRB). Both pre-injection and post-injection monitoring and sampling and analysis were conducted in order to evaluate the impact of organic substrate injection on soluble organic, sulfate, nutrient, microbe, hydrogen sulfide, pH, Eh, and metal concentrations (i.e. the ability to promote sulfate reduction remediation of the plume). Overall it is clear from this field demonstration that both soybean oil and sodium lactate provided a suitable organic substrate to promote SRB growth. The SRB growth promoted by both soybean oil and sodium lactate resulted in sulfate reduction remediation as evidenced by the decrease in sulfate and increase in hydrogen sulfide concentrations, the subsequent increase in pH and decrease in Eh, and finally the subsequent decrease in metal concentrations.

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  • Other Information: PBD: 12 Jan 2003

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  • Report No.: WSRC-TR-2003-00486
  • Grant Number: AC09-96SR18500
  • DOI: 10.2172/821174 | External Link
  • Office of Scientific & Technical Information Report Number: 821174
  • Archival Resource Key: ark:/67531/metadc735513

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  • January 12, 2003

Added to The UNT Digital Library

  • Oct. 18, 2015, 6:40 p.m.

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  • May 5, 2016, 3:21 p.m.

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Phifer, M.A. D-Area Sulfate Reduction DIW-1 Organic Application Field Study, report, January 12, 2003; South Carolina. (digital.library.unt.edu/ark:/67531/metadc735513/: accessed November 14, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.