کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
636710 | 1456135 | 2009 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Semi-empirically derived petrophysical and thermodynamical coefficients of permselective shales-Implications on ore mineralization
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Semi-empirically derived petrophysical and thermodynamical coefficients of permselective shales-Implications on ore mineralization Semi-empirically derived petrophysical and thermodynamical coefficients of permselective shales-Implications on ore mineralization](/preview/png/636710.png)
چکیده انگلیسی
Phenomenological coefficients of shale-electrolyte systems may offer a glimpse into probable matrix-permeability and solute-exclusionary relationships. Shales from unexposed Upper Cretaceous Period Mancos Shale and from Permian Period Abo Formation were cut into thin wafers, placed in custom built osmometers and a chemical potential applied across them giving rise to induced osmotic flow. This in turn spawned matrix unique constants namely mechanical filtration coefficient LP (m3 Nâ1 sâ1), diffusional mobility per unit osmotic pressure LPD (m3 Nâ1 sâ1), osmotic flow coefficient; LD (m3 Nâ1 sâ1), reflection coefficient Ï (dimensionless) at zero gradients of temperature and hydrostatic pressure. Considering intrinsic relationships between these constants where LD=(Ï2LPâÏ/c¯s) and LPD = âÏLP, we have ascertained that the bentonitic fossiliferous Mancos shale had a lower LP and a higher Ï compared to the kaolinitic and siliceous shale from Abo Formation indicating a higher degree of compaction post-diagenesis (lower porosity) and higher filtration efficiency. Mechanistic processes involved in solute transport and matrix morphology indicate key multi-scale transformations, ionic- and atomic-exchange competitions on high energy sites like cation-exchange sites, isomorphic substitution at argillaceous mineral edges, atomic-clipping within basal spacing, preferential pathway migration, dead-end pores that give rise to localized solute exclusionary processes and solute attenuation giving rise to anomalous osmotic gradients.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Membrane Science - Volume 343, Issues 1â2, 1 November 2009, Pages 171-179
Journal: Journal of Membrane Science - Volume 343, Issues 1â2, 1 November 2009, Pages 171-179
نویسندگان
Peter G. Oduor, X. Santos, K. Forward, N. Sharp, C. Bue, F. Casey, J. Abwawo,