Ultralow Level Mercury Treatment Using Chemical Reduction and Air Stripping: Scoping Report

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Data collected during the first stage of a Savannah River Technology Center (SRTC) Strategic Research and Development Project confirmed the efficacy of chemical reduction and air stripping/sparging as an ultralow level mercury treatment concept for waters containing Hg(II). The process consists of dosing the water with low levels of stannous chloride to convert the mercury to Hg. This form of mercury can easily be removed from the water by air stripping or sparging. Samples of Savannah River Site (SRS) groundwater containing approximately 130 ng/L of total mercury (as Hg(II)) were used for the study. In undosed samples, sparging removed 0 ... continued below

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Looney, B.B. August 18, 2000.

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Description

Data collected during the first stage of a Savannah River Technology Center (SRTC) Strategic Research and Development Project confirmed the efficacy of chemical reduction and air stripping/sparging as an ultralow level mercury treatment concept for waters containing Hg(II). The process consists of dosing the water with low levels of stannous chloride to convert the mercury to Hg. This form of mercury can easily be removed from the water by air stripping or sparging. Samples of Savannah River Site (SRS) groundwater containing approximately 130 ng/L of total mercury (as Hg(II)) were used for the study. In undosed samples, sparging removed 0 percent of the initial mercury. In the dosed samples, all of the removals were greater than 94 percent, except in one water type at one dose. This sample, which was saturated with dissolved oxygen, showed a 63 percent reduction in mercury following treatment at the lowest dose. Following dosing at minimally effective levels and sparging, treated water contained less than 10 ng/L total mercury. In general, the data indicate that the reduction of mercury is highly favored and that stannous chloride reagent efficiently targets the Hg(II) contaminant in the presence of competing reactions. Based on the results, the authors estimated that the costs of implementing and operating an ultralow level mercury treatment process based on chemical reduction and stripping/sparging are 10 percent to 20 percent of traditional treatment technologies.

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Medium: P; Size: vp.

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INIS; OSTI as DE00760274

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  • Other Information: PBD: 18 Aug 2000

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  • Report No.: WSRC-RP-2000-00697
  • Grant Number: AC09-96SR18500
  • DOI: 10.2172/760274 | External Link
  • Office of Scientific & Technical Information Report Number: 760274
  • Archival Resource Key: ark:/67531/metadc725480

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Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • August 18, 2000

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  • Sept. 29, 2015, 5:31 a.m.

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  • May 5, 2016, 5:35 p.m.

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Looney, B.B. Ultralow Level Mercury Treatment Using Chemical Reduction and Air Stripping: Scoping Report, report, August 18, 2000; South Carolina. (digital.library.unt.edu/ark:/67531/metadc725480/: accessed November 24, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.