Leak detection with linear soil gas sensors under field conditions — First experiences running a new measurement technique

Neumann, Patrick P.; Bartholmai, Matthias; Lazik, Detlef

doi:10.1109/icsens.2016.7808658

Cited by 2 publications

(2 citation statements)

References 6 publications

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“…A review on gas sensors based on membrane diffusion to achieve real-time and continuous monitoring of important trace gases (e.g., CO 2 , SO 2 , and NH 3 ) in the natural environment (water, soil, and air) is presented in [41]. A membrane-based linear gas sensor applied to monitoring and quantifying the carbon dioxide (CO 2 ) emitted by soil that could originate (escaping) from pipelines, underground storages, etc., was presented in [125]. The sensor has the form of a flexible tube and by the selective permeation of a gas, such as CO 2 , H 2 , or natural gas (consisting primarily of CH 4 ), through its tubular membrane, enables the monitoring of the gas's concentration mean measured along its total length [126].…”

Section: Other Compounds and Sensory Applicationsmentioning

confidence: 99%

Recent Advances in Chemical Sensors for Soil Analysis: A Review

et al. 2022

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The continuously rising interest in chemical sensors’ applications in environmental monitoring, for soil analysis in particular, is owed to the sufficient sensitivity and selectivity of these analytical devices, their low costs, their simple measurement setups, and the possibility to perform online and in-field analyses with them. In this review the recent advances in chemical sensors for soil analysis are summarized. The working principles of chemical sensors involved in soil analysis; their benefits and drawbacks; and select applications of both the single selective sensors and multisensor systems for assessments of main plant nutrition components, pollutants, and other important soil parameters (pH, moisture content, salinity, exhaled gases, etc.) of the past two decades with a focus on the last 5 years (from 2017 to 2021) are overviewed.

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Section: Other Compounds and Sensory Applicationsmentioning

confidence: 99%

Recent Advances in Chemical Sensors for Soil Analysis: A Review

et al. 2022

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“…The initial development of the line sensor was motivated by the need to detect and quantify CO 2 leakages from subsurface gas repositories (Lazik and Ebert, 2013; Neumann et al, 2016a, 2016b; Lazik et al, 2016) where higher concentrations are expected compared with uninfluenced soils. For this application, the gas‐selective membrane of a line sensor was combined with a gas‐tight reference membrane to compensate for environmental parameters (air pressure, soil temperature).…”

Section: Soil Gas Measurementmentioning

confidence: 99%

New Sensor Technology for Field‐Scale Quantification of Carbon Dioxide in Soil

Lazik

Vetterlein

Salas

et al. 2019

Vadose Zone Journal

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Core Ideas This new technology is suitable for field‐scale quantification of CO2 in soil. The measurement scale ranges from decimeters up to decameters. The concentrations from the soil water and air phases are averaged. Transient CO2 production and transport reflect plant growth. Biological activity in soil causes fluxes of O2 into and CO2 out of the soil with significant global relevance. Hence, the dynamics of CO2 concentrations in soil can be used as an indicator for biological activity. However, there is an enormous spatial and temporal variability in soil respiration, which has led to the notion of hotspots and hot moments. This variability is attributed to the spatiotemporal heterogeneity of both plant–soil–microbiome interactions and the local conditions governing gas transport. For the characterization of a given soil, the local heterogeneities should be replaced by some meaningful average. To this end, we introduce a line sensor based on tubular gas‐selective membranes that is applicable at the field scale for a wide range in water content. It provides the average CO2 concentration of the ambient soil along its length. The new technique corrects for fluctuating external conditions (i.e., temperature and air pressure) and the impact of water vapor without any further calibration. The new line sensor was tested in a laboratory mesocosm experiment where CO2 concentrations were monitored at two depths during the growth of barley (Hordeum vulgare L.). The results could be consistently related to plant development, plant density, and changing conditions for gas diffusion toward the soil surface. The comparison with an independent CO2 sensor confirmed that the new sensor is actually capable of determining meaningful average CO2 concentrations in a natural soil for long time periods.

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Leak detection with linear soil gas sensors under field conditions — First experiences running a new measurement technique

Cited by 2 publications

References 6 publications

Recent Advances in Chemical Sensors for Soil Analysis: A Review

Recent Advances in Chemical Sensors for Soil Analysis: A Review

New Sensor Technology for Field‐Scale Quantification of Carbon Dioxide in Soil

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