Spectral induced polarization response to nanoparticles in a saturated sand matrix

Joyce, Ryan A.; Glaser, Danney R.; Werkema, D. Dale; Atekwana, Estella A.

doi:10.1016/j.jappgeo.2011.11.009

Cited by 25 publications

(15 citation statements)

References 38 publications

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“…For example, the observed SIP phase shift for 2% silver nanoparticles in sand saturated with NaCl solution exhibits a typical Cole‐Cole spectrum with a single maximum (Joyce et al . ) similar to

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in Figure for PW800 and PW700. The peak phase of the porous media with 2% silver nanoparticles was about 75 mrad, which is between 55 mrad for PW800 and 110 mrad for PW700 for the same mass fraction.…”

Section: Discussionsupporting

confidence: 63%

Spectral induced polarization for the characterisation of biochar in sand

Gao

Haegel

Huisman

et al. 2017

Near Surface Geophysics

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The use of biochar as a soil amendment attracts increasing research interest. However, the lack of methods to detect and monitor biochar in situ limits the validation of the field-scale application of biochar. Spectral induced polarization is a potential tool to characterise biochar in soil. The aim of this study is to investigate the sensitivity of spectral induced polarization to biochar in sand and to understand how the physicochemical properties of both the biochar and the surrounding matrix influence the spectral induced polarization response. To this end, spectral induced polarization measurements were conducted on four types of biochar with different mass fractions disseminated in saturated sand as a host media with changing electrical conductivity. In addition, it was investigated how the spectral induced polarization response depends on the particle size of biochar. The measured SIP data were interpreted by Debye decomposition to obtain values for the peak relaxation time, τ peak ; total chargeability, M; and normalised total chargeability, M n . Spectral induced polarization showed a clear and specifically differentiated response to the presence of all four types of biochars. M was found to be proportional to the mass fraction of biochars, although relationships varied for each type of biochars. τ peak of biochars increased with increasing particle size. Increased electrolyte concentration enhanced M n for all biochars, although again, the specific response was different for each biochar. In addition, higher electrolyte concentrations decreased τ peak for biochars derived from wood through pyrolysis but did not affect τ peak of biochar derived from miscanthus through hydrothermal carbonisation. It was concluded that the spectral induced polarization response of pyrolytic biochars resembled that of conductors or semiconductors, whereas the spectral induced polarization response of hydrothermal carbonisation biochar more closely resembled that of clay. Overall, the findings in this study suggest that spectral induced polarization is a promising method for the detection and characterisation of biochar in soil.

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Section: Discussionsupporting

confidence: 63%

Spectral induced polarization for the characterisation of biochar in sand

Gao

Haegel

Huisman

et al. 2017

Near Surface Geophysics

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“…The study by Joyce et al . [] using spectral‐induced polarization (complex conductivity) measurements of different nonmetallic particles showed that both nanosilver and nanozero valent iron displayed a relaxation peak at 50 Hz and 500 Hz, respectively. The author related the low‐frequency‐dependent response to the formation of aggregates that increased the particle size to microsized particles.…”

Section: Discussionmentioning

confidence: 99%

“…Also, the study by Slater et al [2007] explained the polarization response associated with sulfide biomineralization under anaerobic conditions due to the biomineral encrusted pores. The study by Joyce et al [2012] using spectral-induced polarization (complex conductivity) measurements of different nonmetallic particles showed that both nanosilver and nanozero valent iron displayed a relaxation peak at 50 Hz and 500 Hz, respectively. The author related the low-frequency-dependent response to the formation of aggregates that increased the particle size to microsized particles.…”

Section: Geophysical Signatures Of Different Iron Mineral Content Andmentioning

confidence: 99%

Geophysical signatures of disseminated iron minerals: A proxy for understanding subsurface biophysicochemical processes

Aal

Atekwana

Revil

2014

J. Geophys. Res. Biogeosci.

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Previous studies have linked biogeophysical signatures to the presence of iron minerals resulting from distinct biophysicochemical processes. Utilizing geophysical methods as a proxy of such biophysicochemical processes requires an understanding of the geophysical signature of the different iron minerals. Laboratory experiments were conducted to investigate the complex conductivity and magnetic susceptibility signatures of five iron minerals disseminated in saturated porous media under variable iron mineral content and grain size. Both pyrite and magnetite show high quadrature and inphase conductivities compared to hematite, goethite, and siderite, whereas magnetite was the highly magnetic mineral dominating the magnetic susceptibility measurements. The quadrature conductivity spectra of both pyrite and magnetite exhibit a well-defined characteristic relaxation peak below 10 kHz, not observed with the other iron minerals. The quadrature conductivity and magnetic susceptibility of individual and a mixture of iron minerals are dominated and linearly proportional to the mass fraction of the highly conductive (pyrite and magnetite) and magnetic (magnetite) iron minerals, respectively. The quadrature conductivity magnitude increased with decreasing grain size diameter of magnetite and pyrite with a progressive shift of the characteristic relaxation peak toward higher frequencies. The quadrature conductivity response of a mixture of different grain sizes of iron minerals is shown to be additive, whereas magnetic susceptibility measurements were insensitive to the variation in grain size diameters (1-0.075 mm). The integration of complex conductivity and magnetic susceptibility measurements can therefore provide a complimentary tool for the successful investigation of in situ biophysicochemical processes resulting in biotransformation or secondary iron mineral precipitation.

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“…These include investigations on biogeochemical transformations (FloresOrozco et al, 2011;Ntarlagiannis et al, 2005;Personna et al, 2008;Slater et al, 2007;Williams et al, 2005Williams et al, , 2009, oxidation-reduction (redox) reactions (Hubbard et al, 2014;Placencia-Gómez et al, 2013), mine tailings and acid mine drainage characterization (Campbell and Horton, 2001;Placencia-Gómez et al, 2015;Vanhala et al, 2005;Yuval and Oldenburg, 1996), monitoring of reactive iron barrier performance (Slater et al, , 2006Wu et al, 2005); and characterization of the polarization properties of different metal minerals (Abdel Aal et al, 2014;Gurin et al, 2013Gurin et al, , 2015Zhdanov et al, 2012) and nanoparticles (Joyce et al, 2012;Flores-Orozco et al, 2015). Such studies mainly focus on the role of the metal content (total weight or volume fraction percentage) and physical (textural) properties such as the metallic particle grain size and surface area on the spectral induced polarization (SIP) response.…”

Section: Introductionmentioning

confidence: 99%