In situ push-pull tests for the determination of TCE degradation and permanganate consumption rates |
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| Authors: | Seok-Oh Ko Sang-Hyun Ji |
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| Institution: | (1) Department of Civil Engineering, Kyunghee University, Yongin, 449-701, South Korea |
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| Abstract: | A simple, single-well push-pull test was conducted at a TCE-contaminated site to estimate the site-specific TCE degradation
and permanganate (MnO4−) consumption rate. Known quantities of a conservative tracer (Br−) and permanganate were rapidly injected into a saturated aquifer then periodically sampled during extraction from the same
well. Concentrations of Br−, TCE, and MnO4− were measured; breakthrough curves (BTCs) for all species of solute were determined. Data analysis of BTCs for bromide and
TCE showed that the first-order rate constant of TCE degradation by MnO4− is 1.67 ± 0.152 h−1. Further, the in situ MnO4− demand rate by TCE and aquifer materials is estimated to be 0.54 ± 0.371 h−1. This study demonstrates that in situ push-pull tests are useful and economical tools for field investigations to determine
contaminant reaction and oxidant consumption rates, which may then be used to optimize groundwater remediation designs. |
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| Keywords: | Push-pull test In situ chemical oxidation Permanganate Oxidative degradation Rate constant |
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