3 results match your criteria Applied Geophysics[Journal]

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Geophysical methods for monitoring soil stabilization processes.

J Appl Geophy 2018 ;148:234-244

Dept. of Geophysics Institute of Astronomy, Geophysics and Atmospheric Sciences, University of São Paulo - São Paulo, SP, Brazil.

Soil stabilization involves methods used to turn unconsolidated and unstable soil into a stiffer, consolidated medium that could support engineered structures, alter permeability, change subsurface flow, or immobilize contamination through mineral precipitation. Among the variety of available methods carbonate precipitation is a very promising one, especially when it is being induced through common soil borne microbes (MICP - microbial induced carbonate precipitation). Such microbial mediated precipitation has the added benefit of not harming the environment as other methods can be environmentally detrimental. Read More

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January 2018

Complex conductivity response to silver nanoparticles in partially saturated sand columns.

J Appl Geophy 2017 Feb;137:73-81

U.S. Environmental Protection Agency, ORD, NERL, EMMD, ECB, Las Vegas, NV, USA.

The increase in the use of nanoscale materials in consumer products has resulted in a growing concern of their potential hazard to ecosystems and public health from their accidental or intentional introduction to the environment. Key environmental, health, and safety research needs include knowledge and methods for their detection, characterization, fate, and transport. Specifically, techniques available for the direct detection and quantification of their fate and transport in the environment are limited. Read More

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February 2017

Imaging and modeling of flow in porous media using clinical nuclear emission tomography systems and computational fluid dynamics.

J Appl Geophy 2012 Jan;76:74-81

Department of Radiotracer Development & Imaging Technology, Lawrence Berkeley National Laboratory, 1 Cyclotron Rd, MS55R0121, Berkeley, CA 94720.

This paper presents experimental and modeling aspects of applying nuclear emission tomography to study fluid flow in laboratory packed porous media columns of the type frequently used in geophysics, geochemistry and hydrology research. Positron emission tomography (PET) and single photon emission computed tomography (SPECT) are used as non-invasive tools to obtain dynamic 3D images of radioactive tracer concentrations. Dynamic sequences obtained using F-FDG PET are used to trace flow through a 5 cm diameter × 20 cm tall sand packed column with and without an impermeable obstacle. Read More

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January 2012
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