soil analyzer Articles
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Residential spill in VA
Laboratory analysis of soil samples showed high values of TPH/DRO showing an initial value of 18,800 and 8,300 ppm and the samples of soil analyzed after treatment with VaporRemed showed a value of 290 ppm and 210 ppm. Both these values are below the stipulated 500 ppm of TPH/DRO. The TPH in the drain water after flushing with the product showed values below the detection levels. The project was ...
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Portable Soil Detector Soil Moisture NPK EC PH Detector with display
Product Description: Portable Soil Detector is a smart handheld Soil data recorder. Usually used with different soil sensors, such as soil moisture sensor, soil temperature and humidity sensor, soil three-in-one sensor, soil nitrogen, phosphorus and potassium sensor, soil ph sensor or multi-depth soil hygrometer. The soil analyzer can store 100W of data at a time. Built-in rechargeable battery, ...
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The Bending of a Screw Plate
The bending of a screw plate may have a considerable influence on the value of soil modulus derived from test results. This paper presents the dimensionless results of a study in which the plate is analyzed by finite elements and the soil is analyzed by integrated Boussinesq theory corrected for embedment in the medium. These results enable correction for the effect of plate bending for a range ...
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Helios Field-portable Core & Soil Analyzer Uses Advanced NMR for Sample Analysis
Vista Clara’s Helios Core and Soil Analyzer (formerly named Corona) brings an unprecedented level of accuracy, flexibility and portability for robust measurements of hydrologic properties across a wide range of core sizes and lithology. By combining advanced NMR technology with low-field, high-bandwidth operation, Helios delivers laboratory precision in a field portable lightweight rugged ...
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Portable Soil Detector Soil Moisture NPK EC PH Detector with display
Background:Portable Soil Detector is a smart handheld Soil data recorder. Usually used with different soil sensors, such as soil moisture sensor, soil temperature and humidity sensor, soil three-in-one sensor, soil nitrogen, phosphorus and potassium sensor, soil ph sensor or multi-depth soil hygrometer. The soil analyzer can store 100W of data at a time. Built-in rechargeable battery, reusable, ...
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Crude Oil in Soil UVF-500D Analyzer Applications - Case Study
Kuwait Oil Well Fires, 1991 Iraq War Photos from the U.S. Space Shuttles (nasa.gov), show oil wells set on fire along the Persian Gulf in June 1991. Hundreds of wells burned, some up to ten months. An estimated 1 to 1.5 billion barrels of crude oil was released, leaving behind hundreds of lakes of oil and “tarcrete” soot across 5% of Kuwait’s landscape. In 2021, Kuwait has plans ...
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How to measure greenhouse gas soil fluxes
Introduction to Greenhouse Gas Monitoring The natural emissions of Greenhouse Gases (GHGs), such as carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O) can be disturbed by human activities and pose an enormous environmental threat. The measurement of GHG fluxes which exist between soil surfaces and the local atmosphere is critical to understanding the impact that human activity is having ...
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Vertisol crack extent associated with gilgai and soil moisture in the Texas gulf coast prairie
Long-term observations of in situ crack formation and closure in shrink-swell soils are rare, but important to understanding hydrology in shrink-swell soils. To analyze spatial and temporal variability of crack development in a Vertisol with gilgai, soil cracks were measured on a 100-m2 area of Laewest clay (fine, smectitic, hyperthermic Typic Hapludert) with native tallgrass vegetation on 42 ...
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Pollution retention capabilities of roadside soils
ABSTRACTRunoff from highways contains significant loads of heavy metals and hydrocarbons. According to German regulations, it should be infiltrated over embankments to support groundwater-recharge. To investigate the decontaminating effect of greened embankments, soil-monoliths from highways with high traffic densities were taken. Soils were analyzed to characterize the contamination in relation ...
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Research on the infiltration processes of lawn soils of the Babao River in the Qilian Mountain
Using a Guelph Permeameter, the soil water infiltration processes were analyzed in the Babao River of the Qilian Mountain in China. The results showed that the average soil initial infiltration and the steady infiltration rates in the upstream reaches of the Babao River are 1.93 and 0.99 cm/min, whereas those of the middle area are 0.48 cm/min and 0.21 cm/min, respectively. The infiltration ...
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Levels of dioxins in soil and corn tissues after 30 years of biosolids application
Detectable levels of dioxins have been reported in biosolids, but very little information is available on the effect of long-term application of biosolids on dioxins accumulation in soil and uptake by plants. We analyzed dioxins in soil and corn tissue samples from field plots after 30 continuous applications of biosolids at 0 (Control), 16.8, and 67.2 Mg biosolids ha−1 yr−1 resulting ...
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Procedure for Determining the Segregation Potential of Freezing Soils
Basic frost heave data obtained from various types of laboratory freezing tests, using computerized ramp temperature generation and temperature control at both warm and cold ends of a soil specimen, are analyzed to determine the segregation potential. Automatic volume change measurements provide fair values of cumulative water intake, but not accurate water intake rates. A method based on ...
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Ecotoxicological Hazard Assessment of Solid-Phase Samples
Abstract: 14 samples originating from Estonia, collected from the oil-shale region (7), oil-polluted sites (4), presumably non-polluted areas (2) and 1 sediment sample from the harbor were studied for the toxicity and presence of the priority pollutants. The soil aqueous extracts were analyzed with a test battery of organisms of different trophic levels (photobacteria, crustacea, algae and ...
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Stress Nonuniformities in Hollow Cylinder Torsional Specimens
Stress nonuniformities across the wall of hollow cylindrical torsional shear (HCT) specimens under generalized stress conditions are assessed taking into account the nonlinearity in soil behavior. The domain of stress space that results in acceptable levels of nonuniformities is thus delineated for a given specimen geometry. It is shown that previous analyses assuming linear elastic soil grossly ...
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Validation of USEPA Method 8260C Using Teledyne Tekmar Atomx, and Perkin-Elmer Clarus 600 GC/MS
Abstract In order to determine the concentration of volatile organic compounds (VOCs) in water and soil matrices the USEPA developed Method 8260C1 in conjunction with preparative Methods 50302 and 50353 . Water and soil samples were analyzed in this study. A working linear calibration curve and Method Detection Limits (MDLs) will be demonstrated for the target compound list. The water study used ...
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Effect of soil texture on water infiltration in semiarid reclaimed land
The infiltration of water and its influencing factors in disturbed or reclaimed land are not well understood. A better understanding would provide essential information for assessing the hydrological processes in disturbed ecosystems. We measured the infiltration of water in soils from loamy and sandy reclaimed land. The relationships between infiltration and soil properties were analyzed ...
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Drip distribution soil performance and operations in a northern climate
Six drip distribution systems in Wisconsin were studied to determine the treatment performance of the soil beneath the distribution network. Of the six systems studied, three received septic tank effluent (STE), one received effluent treated by a recirculating gravel filter (RGF) and the remaining two sites were treated by aerobic treatment units (ATU). Soil conditions varied at these sites, ...
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Reducing Cycle Time for Analysis of 1,4-Dioxane using an Atomx Automated Sample Prep System
Abstract In order to determine the concentration of volatile organic compounds (VOCs) in water and soil matrices the USEPA developed Method 8260C1 in conjunction with preparative Methods 50302 and 50353 . Water and soil samples were analyzed in this study. A working linear calibration curve and Method Detection Limits (MDLs) will be demonstrated for the target compound list. The water study used ...
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Environmental impact of irrigation with greywater treated by recirculating vertical flow constructed wetlands in two climatic regions
Reuse of greywater (GW) has raised environmental and public health concerns. Specifically, these concerns relate to onsite treatment operated by non-professionals; systems must therefore be reliable, simple to use and also economically feasible if they are to be widely used. The aims of this study were to: (a) investigate GW treatment efficiency using 20 full-scale recirculating vertical flow ...
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Long-term effects of land application of class B biosolids on the soil microbial populations, pathogens, and activity
Received for publication August 7, 2009. This study evaluated the influence of 20 annual land applications of Class B biosolids on the soil microbial community. The potential benefits and hazards of land application were evaluated by analysis of surface soil samples collected following the 20th land application of biosolids. The study was initiated in 1986 at the University of Arizona Marana ...
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