-The adsorption of butanol, hexanol, and octanol on alkylammonium montmoriUonites of different chain length is similar to the distribution of alcohol between an organic solvent and water in bulk solution. Successive expansion of the clay layers starts at critical alcohol/cation ratios of 0.6 or lower which are biased mean values due to the heterogeneity of the cation density of the mineral. In ...

Abstract The wellbore instability of the deep coal seam has always been a difficult problem limiting drilling engineering in Dibei area Tarim basin, China. Therefore, mechanisms and anticollapse countermeasures are investigated this study. Firstly, microstructure physical chemical properties rock studied to analyze mechanism. In addition, orthogonal cleat model 3 Dimension Distinct Element Code...

Locally available and with infinite recycling possibilities, the use of earth as building material leads to one lowest environmental impacts in construction sector. Recent advances materials field have been made based on concrete ceramics technologies facilitate its uses dense areas. It is possible modify clay particle interactions material's whole behavior by adding inorganic dispersants flocc...

SPRAY drying dilute suspensions of bentonit ic montmoriltonite produces a powder tha t shows totally random orientation of the crystallites within a sample large enough to diffract X-rays. The powder is collected by an electrostatic precipitator and can be handled in the normal mounting processes without introducing preferred orientation. Electron micrographs show this powder to be composed on ...

[1] OMEGA/Mars Express has discovered large outcrops rich in phyllosilicates in the region of Mawrth Vallis, Mars (around 20 W, 25 N). The region is located in Noachian highly cratered terrains, close to the limit of the Martian dichotomy, where the outflow channel Mawrth Vallis cuts the highlands. We have examined this region using OMEGA spectra of the surface from 0.9 mm to 2.6 mm, with spati...

Effective intercalation of protein molecules within the galleries of montmorillonites can be achieved via simple space enlarging and exchange processes while retaining the native conformation of the guest protein and the multilayered structure of the bioinert host plates. The capacity of accommodating protein molecules in the galleries can be markedly larger than that governed by the Langmuir-t...