Transport behavior and deposition kinetics of humic acid under acidic conditions in porous media

The research focuses on the issues concerning a process of multiphase liquids transport in granular porous media driven by the capillary pressure. The current publication is meant to introduce the results of experimental research conducted to evaluate the kinetics of the imbibition and emulsions behavior inside the porous structures. Moreover, the influence of the dispersed phase concentration and granular media structure on the mentioned process was considered. The medium imbibition with emulsifier-stabilized emulsions composed of oil as the dispersed phase in concentrations of 10 vol%, 30 vol%, and 50 vol%, was investigated. The porous media consisted of oleophilic/hydrophilic beads with a fraction of 200–300 and 600–800 μm. The experimental results provided that the emulsions imbibition in such media depended stronger on its structure compare to single-phase liquids. The increase of the dispersed phase concentration caused an insignificant mass decreasing of the imbibed emulsions and height of its penetration in a sorptive medium. The concentrations of the imbibed dispersions exceeded their initial values, but reduced with permeants front raise in the granular structures that can be defined as the influential factor for wicking process kinetics.

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Some Model of a Suspension Filtration in a Porous Media That Accounts for the Two-Zone and Multistage Character of Deposition Kinetics

Journal of Applied and Industrial Mathematics ◽

10.1134/s1990478920030102 ◽

2020 ◽

Vol 14 (3) ◽

pp. 513-523

Author(s):

B. Kh. Khuzhayorov ◽

J. M. Makhmudov ◽

B. M. Fayziev ◽

T. I. Begmatov

Keyword(s):

Porous Media ◽

Deposition Kinetics ◽

Suspension Filtration

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Degradation Kinetics of Humic acid in Aqueous Solution by Ozonation Treatment under Different Parameter Conditions

IOP Conference Series Earth and Environmental Science ◽

10.1088/1755-1315/596/1/012010 ◽

2020 ◽

Vol 596 ◽

pp. 012010

Author(s):

Zafirah Mahyun ◽

Noor Fazliani Shoparwe ◽

Ahmad Zuhairi Abdullah ◽

Abdul Latif Ahmad ◽

Mardawani Mohamad ◽

...

Keyword(s):

Aqueous Solution ◽

Humic Acid ◽

Degradation Kinetics ◽

Kinetics Of

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Supercritical Fluid Deposition of Ruthenium Thin Films: A Kinetic Study

MRS Proceedings ◽

10.1557/proc-0992-d02-02 ◽

2007 ◽

Vol 992 ◽

Author(s):

Christos F. Karanikas ◽

James J. Watkins

Keyword(s):

Thin Films ◽

Growth Rate ◽

Deposition Temperature ◽

Zero Order ◽

Measurable Effect ◽

Deposition Rates ◽

Reaction Pressure ◽

Deposition Kinetics ◽

First Order ◽

Kinetics Of

AbstractThe kinetics of the deposition of ruthenium thin films from the hydrogen assisted reduction of bis(2,2,6,6-tetramethyl-3,5-heptanedionato)(1,5-cyclooctadiene)ruthenium(II), [Ru(tmhd)2cod], in supercritical carbon dioxide was studied in order to develop a rate expression for the growth rate as well as to determine a mechanism for the process. The deposition temperature was varied from 240°C to 280°C and the apparent activation energy was 45.3 kJ/mol. Deposition rates up to 30 nm/min were attained. The deposition rate dependence on precursor concentrations between 0 and 0.2 wt. % was studied at 260°C with excess hydrogen and revealed first order deposition kinetics with respect to precursor at concentrations lower then 0.06 wt. % and zero order dependence at concentrations above 0.06 wt. %. The effect of reaction pressure on the growth rate was studied at a constant reaction temperature of 260°C and pressures between 159 bar to 200 bar and found to have no measurable effect on the growth rate.

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