scholarly journals Temperature effect on diffusion and non-linear adsorption of ammonium through geosynthetic clay liner and in-situ clayey soil in Hanoi, Vietnam

2021 ◽  
Vol 9 (2) ◽  
pp. 55-60
Author(s):  
Ta Thi Hoai ◽  
Toshifumi Mukunoki ◽  
Nhuan Trong Mai
Keyword(s):  
Temperature Effect ◽  
Clayey Soil ◽  
Geosynthetic Clay Liner ◽  
Clay Liner ◽  
Non Linear

Clay liner materials for land disposal of hazardous non-metal wastes

1996 ◽  
Vol 33 (8) ◽  
pp. 71-77
Author(s):  
I. M.-C. Lo ◽  
H. M. Liljestrand ◽  
J. Khim ◽  
Y. Shimizu
Keyword(s):  
Sorption Capacity ◽  
Organic Anion ◽  
Surface Exchange ◽  
Clay Liner ◽  
Effective Removal ◽  
Exchange Constants ◽  
Anionic Species ◽  
Surface Ligand ◽  
Land Disposal

Simple land disposal systems for hazardous and mixed wastes contain heavy metal cationic species through precipitation and ion exchange mechanisms but typically fail by releasing soluble organic and inorganic anionic species. To enhance the removal of anions from leachate, clays are modified with coatings of iron or aluminium cations to bridge between the anionic surface and the anionic pollutants. A competitive surface ligand exchange model indicates that surface coatings of 10 meq cation/gm montmorillonite under typical leachate conditions increase the inorganic anion sorption capacity by at least a factor of 6 and increase the intrinsic surface exchange constants by more than a factor of 100. Similarly, metal hydroxide coatings on montmorillonite increase the organic anion sorption capacity by a factor of 9 and increase the intrinsic surface exchange constants by a factor of 20. For historical concentrations of non-metal anions in US hazardous and mixed waste leachate, sorption onto natural clay liner materials is dominated by arsenate sorption. With cation coatings, anion exchange provides an effective removal for arsenate, selenate, phenols, cresols, and phthalates. Engineering applications are presented for the use of modified clays as in situ barriers to leachate transport of anionic pollutants as well as for above ground treatment of recovered leachate.

Magnetised Wave Collapse in Solar System Plasmas

1993 ◽  
Vol 10 (4) ◽  
pp. 283-286 ◽  
Author(s):  
Andrew Melatos ◽  
Peter Robinson
Keyword(s):  
Solar System ◽  
Wave Packets ◽  
Particle Interactions ◽  
Coherent Wave ◽  
Wave Collapse ◽  
Non Linear ◽  
Acceleration Zone ◽  
The Waves ◽  
Linear Plasma

AbstractClumpy, intense wave packets observed in situ in the Jovian and terrestrial electron foreshocks, and in the Earth’s auroral acceleration zone, point to the existence of non-linear plasma turbulence in these regions. In non-linear turbulence, wave packets collapse to short scales and high fields, stopping only when coherent wave-particle interactions efficiently dissipate the energy in the waves. The purpose of this paper is to examine the shortest scales and highest fields achieved during collapse in a strongly magnetised plasma, and identify parts of the solar system where the magnetised aspects of wave collapse are important.

The Test Study to the Changes of Excess Pore Water Pressure during Precast Pile Construction

2012 ◽  
Vol 193-194 ◽  
pp. 1010-1013
Author(s):  
Shu Qing Zhao
Keyword(s):  
Pore Water ◽  
Clayey Soil ◽  
Pore Water Pressure ◽  
Water Pressure ◽  
Excess Pore Pressure ◽  
Soil Pressure ◽  
Excess Pore Water Pressure ◽  
Test Study ◽  
Excess Pore

The construct to precast pile in thick clayey soil can cause the accumulation of excess pore water pressure. The high excess pore pressure can make soil, buildings and pipes surrounded have large deflection, even make them injured. Combining with actual projects, this paper presents an in-situ model test on the changes of excess pore water pressure caused by precast pile construct. It is found that the radius of influence range for single pile driven is about 15m，the excess pore water pressure can reach or even exceed the above effective soil pressure, and there are two relatively stable stages.

In-situ imaging of reacting single-particle zeolites by non-linear optical microscopy

2015 ◽  
Author(s):  
Paul J. Wrzesinski ◽  
Mikhail N. Slipchenko ◽  
Taslima A. Zaman ◽  
Robert M. Rioux ◽  
James R. Gord ◽  
...  
Keyword(s):  
Optical Microscopy ◽  
Single Particle ◽  
Non Linear ◽  
Linear Optical ◽  
In Situ Imaging
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