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Characterization of...
Characterization of nZVI mobility in a field scale test
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- Kocur, Chris (author)
- University of Western Ontario
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- Chowdhury, A (author)
- University of Western Ontario
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- Sakulchaicharoen, N (author)
- University of Western Ontario
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- Boparai, H (author)
- University of Western Ontario
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Weber, K (author)
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- Sharma, Prabhakar, 1976- (author)
- Civil and Environmental Engineering, Western University, 1151 Richmond Rd. London, Ontario, N6A 5B8, Canada ‡ Civil Enginee
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Krol, M (author)
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Austrins, L (author)
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Peace, C (author)
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Sleep, B (author)
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- O'Carroll, Denis (author)
- University of Western Ontario
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University of Western Ontario Civil and Environmental Engineering, Western University, 1151 Richmond Rd London, Ontario, N6A 5B8, Canada ‡ Civil Enginee (creator_code:org_t)
- 2014-02-12
- 2014
- English.
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In: Environmental Science and Technology. - : American Chemical Society (ACS). - 0013-936X .- 1520-5851. ; 48:5, s. 2862-2869
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- Nanoscale zero valent iron (nZVI) particles were injected into a contaminated sandy subsurface area in Sarnia, Ontario. The nZVI was synthesized on site, creating a slurry of 1 g/L nanoparticles using the chemical precipitation method with sodium borohydride (NaBH4) as the reductant in the presence of 0.8% wt. sodium carboxymethylcellulose (CMC) polymer to form a stable suspension. Individual nZVI particles formed during synthesis had a transmission electron microscopy (TEM) quantified particle size of 86.0 nm and dynamic light scattering (DLS) quantified hydrodynamic diameter for the CMC and nZVI of 624.8 nm. The nZVI was delivered to the subsurface via gravity injection. Peak normalized total Fe breakthrough of 71% was observed 1m from the injection well and remained above 50% for the 24 hour injection period. Samples collected from a monitoring well 1 m from the injection contained nanoparticles with TEM-measured particle diameter of 80.2 nm and hydrodynamic diameter of 562.9 nm. No morphological changes were discernible between the injected nanoparticles and nanoparticles recovered from the monitoring well. Energy dispersive X-ray spectroscopy (EDS) was used to confirm the elemental composition of the iron nanoparticles sampled from the downstream monitoring well, verifying the successful transport of nZVI particles. This study suggests that CMC stabilized nZVI can be transported at least 1 m to the contaminated source zone at significant Fe0 concentrations for reaction with target contaminants.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Naturresursteknik -- Annan naturresursteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Environmental Engineering -- Other Environmental Engineering (hsv//eng)
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Multidisciplinär geovetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Geosciences, Multidisciplinary (hsv//eng)
Keyword
- nZVI
- transport
- Hydrology
- Hydrologi
Publication and Content Type
- ref (subject category)
- art (subject category)
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Kocur, Chris
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Chowdhury, A
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Sakulchaicharoen ...
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Boparai, H
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Weber, K
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Sharma, Prabhaka ...
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show more...
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Krol, M
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Austrins, L
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Peace, C
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Sleep, B
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O'Carroll, Denis
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show less...
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- ENGINEERING AND TECHNOLOGY
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ENGINEERING AND ...
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and Environmental En ...
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and Other Environmen ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Earth and Relate ...
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and Geosciences Mult ...
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Environmental Sc ...
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Uppsala University