Glen B. Chronister's research while affiliated with CH2M Hill and other places
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Publications (5)
Super-absorbent polymers (SAPs) have the potential to remove water and associated contaminants from unsaturated sediments in the field. Column and flow cell experiment were conducted to test the ability of four types of SAPs to remove water from unsaturated porous media. Column experiments, with emplacement of a layer of polymer on top of unsaturat...
Desiccation of the vadose zone has the potential to reduce the flux of contaminants to underlying groundwater by removing moisture and decreasing the aqueous-phase permeability of the desiccated zone. However, data to evaluate implementation of desiccation are needed to enable consideration of desiccation as a potential remedy. Implementation of de...
A vast majority of Hanford’s remaining in-ground contaminants reside in the vadose zone of the Central Plateau, where reprocessing operations occurred. The vadose zone is comprised of about 75 meters of water-unsaturated sediments above groundwater. These contaminants have, and continue to release into groundwater that discharges to the Columbia Ri...
DOE-EM, Office of Groundwater and Soil Remediation and DOE Richland, in collaboration with the Hanford site and Pacific Northwest National Laboratory, have established the Deep Vadose Zone Applied Field Research Center (DVZ-AFRC). The DVZ-AFRC leverages DOE investments in basic science from the Office of Science, applied research from DOE EM Office...
Citations
... Batch experiments were conducted using aqueous matrices with sitespecific geochemical signatures from the Hanford Site: 1) a synthetic groundwater (200W SGW) representative of the groundwater in the Central Plateau of the Hanford Site (see map, electronic supplementary information (ESI) Fig. S1); and 2) a synthetic perched water (SPW) representative of a perched water zone that contains high concentrations of Tc, U, and nitrate (Oostrom et al., 2013). The 200W SGW and SPW are assumed to be representative of porewater in the unsaturated zone as well. ...
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... Monitoring for flux conditions beneath surface infiltration barriers can be applied to evaluate the impact of the barrier on contaminant flux as a function of depth within the vadose zone. Soil desiccation has also been demonstrated to be effective at creating dry conditions at the USDOE Hanford Site in southeastern Washington State, where moisture content and contaminant flux were lowered to near zero (Oostrom et al., 2009;Truex et al., 2011Truex et al., , 2012Truex et al., , 2013Truex et al., , 2018Zhang, 2016). Soil desiccation is carried out by injecting dry gas into the vadose zone, which causes water to evaporate, resulting in low moisture content, greater matric suction, and lower aqueous permeability (Oostrom et al., 2009;Truex et al., 2012Truex et al., , 2018. ...
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... Owing to their cross-linked structure and ionic characteristics, SAPs could absorb large amounts of water molecules and swell enormously. They could be used to prevent soil from water loss, and thus prolonging the survival of plants and increasing crop yield under drought stress (Oostrom et al., 2012;Li et al., 2014). Owing to the abundance of metal-binding groups in the gel, SAPs are well suited to chelate metal ions and decrease their bioavailability (Varennes & Cunha-Queda, 2005;Ekebafe et al., 2012). ...
