scholarly journals Effect of Pore Water Salinity on Swelling Hehavior, and Mineralogical and Microstructural Properties of Bentonite-Sand Barrier Materials

2019 ◽  
Author(s):  
Mohammed Alzamel ◽  
Mamadou Fall
Keyword(s):  
Pore Water ◽  
Water Salinity ◽  
Microstructural Properties ◽  
Barrier Materials ◽  
Pore Water Salinity

Impact of Inoculation Protocols, Salinity, and pH on the Degradation of Polycyclic Aromatic Hydrocarbons (PAHs) and Survival of PAH-Degrading Bacteria Introduced into Soil

1998 ◽  
Vol 64 (1) ◽  
pp. 359-362 ◽  
Author(s):  
Matthias Kästner ◽  
Maren Breuer-Jammali ◽  
Bernd Mahro
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Pore Water ◽  
Aromatic Hydrocarbons ◽  
Soil Bacteria ◽  
Water Salinity ◽  
Sphingomonas Paucimobilis ◽  
Pah Degradation ◽  
Degrading Bacteria ◽  
Polycyclic Aromatic ◽  
Pore Water Salinity

ABSTRACT Degradation of polycyclic aromatic hydrocarbons (PAHs) and survival of bacteria in soil was investigated by applying different inoculation protocols. The soil was inoculated with Sphingomonas paucimobilis BA 2 and strain BP 9, which are able to degrade anthracene and pyrene, respectively. CFU of soil bacteria and of the introduced bacteria were monitored in native and sterilized soil at different pHs. Introduction with mineral medium inhibited PAH degradation by the autochthonous microflora and by the strains tested. After introduction with water (without increase of the pore water salinity), no inhibition of the autochthonous microflora was observed and both strains exhibited PAH degradation.

Distribution of saline permafrost in the Northwest Territories, Canada

1993 ◽  
Vol 30 (3) ◽  
pp. 506-514 ◽  
Author(s):  
E.G. Hivon ◽  
D.C. Sego
Keyword(s):  
Key Words ◽  
Data Base ◽  
Northwest Territories ◽  
Pore Water ◽  
Coastal Communities ◽  
Quaternary Geology ◽  
Water Salinity ◽  
Mackenzie Delta ◽  
Pore Water Salinity ◽  
Detrimental Impact

Saline permafrost has a detrimental impact on the performance of foundations. Increased pore-water salinity decreases the strength and increases the deformation susceptibility of permafrost and foundations installed in permafrost. A data base of the distribution of saline permafrost in the Northwest Territories shows high pore-water salinities beneath coastal communities and at locations along the upper Mackenzie Valley and within the Mackenzie Delta. Salinity of inland sites is usually low. High salinities are usually associated with ice-poor materials and are linked with previous marine submergence associated with glacial events. Key words : permafrost, saline distribution, measurements, Quaternary geology.

Effects of pore-water salinity on soil identification using in situ cone penetration tests

2021 ◽  
pp. 106252
Author(s):  
Yongfeng Deng ◽  
Haochen Xue ◽  
Yongxin Wu ◽  
Tongwei Zhang ◽  
Zilong Wu ◽  
...  
Keyword(s):  
Pore Water ◽  
Water Salinity ◽  
Cone Penetration ◽  
Cone Penetration Tests ◽  
Pore Water Salinity ◽  
Penetration Tests

Segregation potential – pressure – salinity relationships near thermal steady state for a clayey silt

1990 ◽  
Vol 27 (2) ◽  
pp. 203-215 ◽  
Author(s):  
J.-M. Konrad
Keyword(s):  
Steady State ◽  
Pore Water ◽  
Moisture Transfer ◽  
Frost Heave ◽  
Water Salinity ◽  
Saline Soils ◽  
Clayey Silt ◽  
Segregation Potential ◽  
Pore Water Salinity ◽  
Thermal Steady State

Laboratory freezing tests were performed on a saturated clayey silt at various pore-water salinities and applied pressures to establish the relationships between pore-water salinity, overburden, and the amount of moisture transfer during freezing near thermal steady state conditions. The experimental data confirmed that the concept of segregation potential established for salt-free soils can be extended to saline soils. The segregation potential at the onset of the final ice lens in step-freezing tests (or near thermal steady state) should be related to the average salinity of the frozen fringe associated with the final ice lens. This pore-water salinity is different from the initial pore-water salinity as a result of solute exclusion at the ice lenses causing an enrichment as freezing proceeds. Unfortunately, it is very difficult to determine the average salinity in the frozen fringe owing to its small size. Instead, it is proposed to use the initial water salinity to develop the constitutive equations in freezing saline soils. A procedure for frost heave predictions in the field is outlined. Key words: freezing tests, clayey silt, saline water, frost heave.

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