An image-based method for quick measurement of the soil shrinkage characteristics curve of soil slurry

Geoderma ◽  
2020 ◽  
Vol 363 ◽  
pp. 114165
Author(s):  
Andrew Cudzo Amenuvor ◽  
Guowei Li ◽  
Jiantao Wu ◽  
Yuzhou Hou ◽  
Wei Chen
Keyword(s):  
Soil Slurry ◽  
Quick Measurement ◽  
Soil Shrinkage

On-site generation of reactive oxidative radicals from dithionite treated oxic soil slurry

2021 ◽  
pp. 1-34
Author(s):  
Abdullateef Omeiza Ibrahim ◽  
Yao Huang ◽  
Hui Liu ◽  
Nasiru Abba Mustapha
Keyword(s):  
Soil Slurry

scholarly journals Functional Relationship between Soil Slurry Transfer and Deposition in Urban Sewer Conduits

Water ◽  
2018 ◽  
Vol 10 (7) ◽  
pp. 825 ◽  
Author(s):  
Yang Song ◽  
Eui Lee ◽  
Jung Lee
Keyword(s):  
Functional Relationship ◽  
Soil Slurry

scholarly journals Potential of Flocculant-Aided Soil Slurry Dewatering in Land Reclamation: Laboratory Investigations

2018 ◽  
Vol 2018 ◽  
pp. 1-6 ◽  
Author(s):  
Yang Jiao ◽  
Jia He ◽  
Peiyuan Zhou ◽  
Ziqian Cao
Keyword(s):  
Model Test ◽  
Large Scale ◽  
Land Reclamation ◽  
Drainage Water ◽  
Tube Model ◽  
Soil Slurry ◽  
Vacuum Preloading ◽  
Geotextile Tube ◽  
Laboratory Investigations ◽  
Flocculation Effect

When soil slurry is used as a fill material in land reclamation projects, vacuum preloading or geotextile tube systems are often adopted for the dewatering treatment in a large scale. However, these two methods often suffer from clogging problems and impede further dewatering treatment. In this study, we test the potential of using flocculants to enhance the dewatering efficiency in a vacuum preloading model test and a geotextile tube model test. Experimental results show that, by adding a flocculant into soil slurry, the dewatering efficiency in terms of drainage volumes and rates is significantly improved as compared to that in pure soil slurry. The amounts of drainage water in the tests with flocculant addition are about 20% and 100% more than those in pure slurry tests in the vacuum preloading and geotextile tube model tests, respectively. The underlying reason could be the flocculation effect that prevents the movement of small soil grains and the formation of impermeable layers on the filters.

scholarly journals Microcolony Cultivation on a Soil Substrate Membrane System Selects for Previously Uncultured Soil Bacteria

2005 ◽  
Vol 71 (12) ◽  
pp. 8714-8720 ◽  
Author(s):  
Belinda C. Ferrari ◽  
Svend J. Binnerup ◽  
Michael Gillings
Keyword(s):  
Soil Bacteria ◽  
Bacterial Species ◽  
Membrane System ◽  
Soil Extract ◽  
Growth Strategy ◽  
Soil Slurry ◽  
Polycarbonate Membrane ◽  
Microbiological Methods ◽  
Candidate Division ◽  
Excessive Nutrients

ABSTRACT Traditional microbiological methods of cultivation recover less than 1% of the total bacterial species, and the culturable portion of bacteria is not representative of the total phylogenetic diversity. Classical cultivation strategies are now known to supply excessive nutrients to a system and therefore select for fast-growing bacteria that are capable of colony or biofilm formation. New approaches to the cultivation of bacteria which rely on growth in dilute nutrient media or simulated environments are beginning to address this problem of selection. Here we describe a novel microcultivation method for soil bacteria that mimics natural conditions. Our soil slurry membrane system combines a polycarbonate membrane as a growth support and soil extract as the substrate. The result is abundant growth of uncharacterized bacteria as microcolonies. By combining microcultivation with fluorescent in situ hybridization, previously “unculturable” organisms belonging to cultivated and noncultivated divisions, including candidate division TM7, can be identified by fluorescence microscopy. Successful growth of soil bacteria as microcolonies confirmed that the missing culturable majority may have a growth strategy that is not observed when traditional cultivation indicators are used.

scholarly journals Measurement and Compensation of Tool Contour Error Using White Light Interferometry for Ultra-Precision Diamond Turning of Freeform Surfaces

2020 ◽  
Vol 14 (4) ◽  
pp. 654-664 ◽  
Author(s):  
Kodai Nagayama ◽  
◽  
Jiwang Yan
Keyword(s):  
White Light ◽  
High Efficiency ◽  
Diamond Tool ◽  
Microlens Array ◽  
Diamond Turning ◽  
Contour Error ◽  
Form Accuracy ◽  
Freeform Optics ◽  
Ultra Precision ◽  
Quick Measurement

In ultra-precision diamond turning of freeform optics, it is necessary to obtain submicron-level form accuracy with high efficiency. In this study, we proposed a new method for the quick measurement and compensation of tool contour errors to improve the form accuracy of the workpiece. In this method, the nanometer-scale contour error of a diamond tool is quickly and precisely measured using a white light interferometer and then compensated for, before machining. Results showed that the contour of a diamond tool was measured with an error less than 0.05 μm peak-to-valley (P-V) and the feasibility of error compensation was verified through cutting experiments to create a paraboloid mirror and a microlens array. The form error decreased to 0.2 μm P-V regardless of the contour error of the diamond tools when cutting the paraboloid mirror, and that of the microlens array was reduced to 0.15 μm P-V during a single machining step.

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