Intermediate‐Scale Investigation of Nonaqueous‐Phase Liquid Architecture on Partitioning Tracer Test Performance

Moreno-Barbero, Elena; Kim, Yongcheol; Saenton, Schradh; Illangasekare, Tissa H.

doi:10.2136/vzj2006.0108

Cited by 6 publications

(5 citation statements)

References 29 publications

(43 reference statements)

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“…We have to emphasize that although numerous other techniques are used in θ monitoring, the technique based on gamma-ray attenuation is well established and employed to this day [12,[32][33][34][35][36]. This nuclear method enables fast (for high-activity radioactive sources) and accurate measurements of θ [20].…”

Section: Resultsmentioning

confidence: 99%

Nuclear Laboratory Setup for Measuring the Soil Water Content in Engineering Physics Teaching Laboratories

Pires

Cássaro

2023

AgriEngineering

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Soil water content (θ) is a crucial soil parameter that is determined in many studies involving engineering, geology, and soil and environmental sciences. For instance, evaluating the soil strength, groundwater recharge, hydraulic conductivity, and soil aeration status depends on θ. The measurement of θ is fundamental for monitoring and controlling several soil processes. The gamma-ray attenuation (GRA) technique is a fast and non-destructive way of evaluating θ in soils with very contrasting compositions. Although, GRA is rarely explored in lab physics classes. The proposal of an experiment using a teaching GRA apparatus for measuring θ is presented. The experimental setup consisted of a 137Cs radioactive source, a Geiger-Müller detector, and a radiation counter. Soil samples with four distinct granulometric compositions were analyzed. Strong linear correlations were found between the transmitted gamma-ray photon intensity and θ (correlation coefficients varying from −0.95 to −0.98). The soil porosity, measured by the conventional and GRA methods, presented differences that varied from c. 7.8% to c. 18.2%. In addition, strong linear relationships (correlation coefficients from 0.90 to 0.98) were observed between the GRA and the traditional (gravimetric) method of θ measurement. It was verified that the teaching GRA apparatus is useful for measuring θ. In addition, the apparatus allows the introduction of some important aspects related to the study of modern physics for undergraduate students of many fields of knowledge.

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Section: Resultsmentioning

confidence: 99%

Nuclear Laboratory Setup for Measuring the Soil Water Content in Engineering Physics Teaching Laboratories

Pires

Cássaro

2023

AgriEngineering

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“…We have to emphasize that although numerous other techniques are used in θ moni-toring, the technique based on gamma-ray attenuation is well established and employed to this day [12,[32][33][34][35][36]. This nuclear method enables fast (for high-activity radioactive sources) and accurate measurements of θ [20].…”

Section: Resultsmentioning

confidence: 99%

Nuclear Laboratory Setup for Measuring the Soil Water Content in Engineering Physics Teaching Laboratories

Prathap,

ANUPAMA

2020

TURCOMAT

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One important soil parameter that is measured in many engineering, geology, soil and environmental science investigations is the soil water content (θ). For example, θ influences the assessment of soil strength, hydraulic conductivity, groundwater recharge, and soil aeration condition. Measurement of θ is essential for tracking and managing a number of soil processes. A quick and non-destructive method for determining μ in soils with drastically different compositions is the gammaray attenuation (GRA) approach. However, lab physics classes rarely cover GRA. An experiment involving the measurement of θ using a teaching GRA apparatus is proposed. A Geiger-Müller detector, a radiation counter, and a radioactive source with a 37Cs decay were the components of the experimental setup. Four different granulometric compositions of soil samples were examined. The transmitted gamma-ray photon intensity and θ were found to have strong linear relationships (correlation coefficients ranging from -0.95 to -0.98). There were variations in the soil porosity between the traditional and GRA techniques, ranging from around 7.8% to about 18.2%. Furthermore, a robust linear correlation (correlation coefficients ranging from 0.90 to 0.98) was noted between the GRA and the conventional gravimetric technique for measuring θ. The effectiveness of the teaching GRA apparatus in measuring θ was confirmed. Additionally, the device enables undergraduate students from a variety of subject areas to be introduced to a few significant facets of the study of contemporary physics.

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“…Brooks et al, 2002;Hartog et al, 2010;Jalbert et al, 2003;Jin et al, 1997;Moreno-Barbero et al, 2007;Ramsburg et al, 2005;Willson et al, 2000). Trichloroethene (TCE) (ACS grade) was employed as a representative DNAPL, and 2-propanol (IPA) (HPLC grade), which is miscible with water, was used as a solvent in preparing samples for analysis.…”

Section: Ii221 Materials and Analytical Methodsmentioning

confidence: 99%

Metric Identification and Protocol Development for Characterizing DNAPL Source Zone Architecture and Associated Plume Response

Abriola¹,

Miller²,

Pennell³

et al. 2013

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Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing this collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden to Department of Defense, Washington Headquarters Services, Directorate for Information Operations and Reports (0704-0188), 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302. Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to any penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number. PLEASE DO NOT RETURN YOUR FORM TO THE ABOVE ADDRESS. REPORT DATE (DD-MM-YYYY)2. REPORT TYPE SPONSOR/MONITOR'S REPORT NUMBER(S) DISTRIBUTION / AVAILABILITY STATEMENT SUPPLEMENTARY NOTES ABSTRACTThe overarching goal of this research is to develop and demonstrate a comprehensive approach for field characterization of DNAPL source zones which quantifies the key features that control plume response. Here the intent is to integrate targeted (local-scale) in situ tests with transect-based observations of downstream contaminant flux or concentration and information on subsurface geologic variability. To address its primary goal, the research encompasses the following specific objectives: (1) identification of the most information rich metrics for linking NAPL architecture to plume response; (2) development and refinement of in situ test methods and modeling tools that can be used to quantify identified metrics in targeted regions of the source zone; (3) integration of these metrics and tools with current machine learning characterization methods for an overall source zone assessment protocol; and (4) development of simplified models for prediction of plume response. The research approach integrates batch, column and aquifer cell experiments with mathematical modeling and data processing tools to identify and quantify features of the DNAPL architecture controlling down gradient plume response. SUBJECT TERMSField characterization; Metric identification; DNAPL; SECURITY CLASSIFICATION OF:No classified information

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Intermediate‐Scale Investigation of Nonaqueous‐Phase Liquid Architecture on Partitioning Tracer Test Performance

Cited by 6 publications

References 29 publications

Nuclear Laboratory Setup for Measuring the Soil Water Content in Engineering Physics Teaching Laboratories

Nuclear Laboratory Setup for Measuring the Soil Water Content in Engineering Physics Teaching Laboratories

Nuclear Laboratory Setup for Measuring the Soil Water Content in Engineering Physics Teaching Laboratories

Metric Identification and Protocol Development for Characterizing DNAPL Source Zone Architecture and Associated Plume Response

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