Injection of Zero-Valent Iron into an Unconfined Aquifer Using Shear-Thinning Fluids

Autor:	Vincent R. Vermeul, Robert D. Mackley, Thomas W. Wietsma, Tamzen Macbeth, D.P. Mendoza, Brad G. Fritz, Michael J. Truex, Martinus Oostrom
Rok vydání:	2010
Předmět:	Zerovalent iron geography Shear thinning geography.geographical_feature_category Source area Chemistry Environmental engineering Soil science Aquifer Single injection Radius of influence Volume concentration Water Science and Technology Civil and Structural Engineering Water well
Zdroj:	Ground Water Monitoring & Remediation. 31:50-58
ISSN:	1069-3629
DOI:	10.1111/j.1745-6592.2010.01319.x
Popis:	Approximately 190 kg of 2 μm-diameter zero-valent iron (ZVI) particles were injected into a test zone in the top 2 m of an unconfined aquifer within a trichloroethene (TCE) source area. A shear-thinning fluid was used to enhance ZVI delivery in the subsurface to a radial distance of up to 4 m from a single injection well. The ZVI particles were mixed in-line with the injection water, shear-thinning fluid, and a low concentration of surfactant. ZVI was observed at each of the seven monitoring wells within the targeted radius of influence during injection. Additionally, all wells within the targeted zone showed low TCE concentrations and primarily dechlorination products present 44 d after injection. These results suggest that ZVI can be directly injected into an aquifer with shear-thinning fluids to induce dechlorination and extends the applicability of ZVI to situations where other emplacement methods may not be viable.
Databáze:	OpenAIRE
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