On the mechanism of benzene and toluene adsorption in single-compound and binary systems: energetic interactions and competitive effects

2017 ◽  
Vol 86 ◽  
pp. 259-265 ◽  
Author(s):  
A. Erto ◽  
◽  
S. Chianese ◽  
A. Lancia ◽  
D. Musmarra
Keyword(s):  
Binary Systems ◽  
Competitive Effects ◽  
Single Compound ◽  
Energetic Interactions

Statistical physics-based analysis of the adsorption of Cu2+ and Zn2+ onto synthetic cancrinite in single-compound and binary systems

2019 ◽  
Vol 7 (4) ◽  
pp. 103217 ◽  
Author(s):  
Ali Q. Selim ◽  
Lotfi Sellaoui ◽  
Sayed A. Ahmed ◽  
Mohamed Mobarak ◽  
Essam A. Mohamed ◽  
...  
Keyword(s):  
Statistical Physics ◽  
Binary Systems ◽  
Single Compound

H2O2-activated anthracite impregnated with chitosan as a novel composite for Cr(VI) and methyl orange adsorption in single-compound and binary systems: Modeling and mechanism interpretation

2020 ◽  
Vol 380 ◽  
pp. 122445 ◽  
Author(s):  
Essam A. Mohamed ◽  
Ali Q. Selim ◽  
Sayed A. Ahmed ◽  
Lotfi Sellaoui ◽  
Adrián Bonilla-Petriciolet ◽  
...  
Keyword(s):  
Methyl Orange ◽  
Binary Systems ◽  
Systems Modeling ◽  
Single Compound

Coal combustion ash sorbents for Cd and Zn capture in single-compound and binary systems

2018 ◽  
Vol 127 ◽  
pp. 41-49 ◽  
Author(s):  
M. Balsamo ◽  
F. Di Natale ◽  
A. Erto ◽  
F. Montagnaro
Keyword(s):  
Coal Combustion ◽  
Binary Systems ◽  
Single Compound

scholarly journals New insights into single-compound and binary adsorption of copper and lead ions on a treated sea mango shell: experimental and theoretical studies

2017 ◽  
Vol 19 (38) ◽  
pp. 25927-25937 ◽  
Author(s):  
Lotfi Sellaoui ◽  
Felycia Edi Soetaredjo ◽  
Suryadi Ismadji ◽  
Éder Cláudio Lima ◽  
Guilherme L. Dotto ◽  
...  
Keyword(s):  
Adsorption Isotherms ◽  
Binary Systems ◽  
Lead Ions ◽  
Theoretical Studies ◽  
Binary Adsorption ◽  
Mango Fruit ◽  
Different Temperatures ◽  
Single Compound ◽  
Experimental And Theoretical Studies

Herein, adsorption isotherms of Pb(ii) and Cu(ii) ions on treated sea mango fruit in both single-compound and binary systems were experimentally realized at different temperatures in the range of 30–50 °C.

scholarly journals Cadmium and zinc uptake by dried activated sludge: Equilibrium and experimental design study

2021 ◽  
Vol 10 (2) ◽  
pp. 117-130
Author(s):  
Lucia Remenárová ◽  
Martin Pipíška ◽  
Miroslav Horník ◽  
Jana Marešová ◽  
Jozef Augustín
Keyword(s):  
Activated Sludge ◽  
Binary Systems ◽  
Metal Removal ◽  
Solution Ph ◽  
Sorption Data ◽  
Competitive Effects ◽  
Concentration Maximum ◽  
Component Systems ◽  
Maximum Sorption ◽  
Simple Extrapolation

Removal of Cd2+ and Zn2+ ions from single and binary solutions by dried activated sludge was studied in batch experiments. It was shown that the metal removal is a rapid process significantly influenced by solution pH. Maximum uptake of both Cd and Zn was reached at pH 6.0 and negligible uptake was observed at pH 2.0. The Langmuir isotherm was found to well represent the measured equilibrium sorption data in single metal systems and the maximum sorption capacities Qmax of the activated sludge (d.w.), calculated from Langmuir model were 540 ± 16 μmol/g for Zn2+ and 510 ± 17 μmol/g for Cd2+ ions. The Response surface methodology (RSM) was used for investigation of interaction and competitive effects in binary metal system. It was found that dried activated sludge in binary system Cd-Zn has slightly higher affinity for Cd2+ comparing with Zn2+ ions. Competitive effect of Cd on Zn uptake increased with increasing solution pH and Cd initial concentration. Maximum sorption capacities of the activated sludge were 321 μmol Cd2+/g and 312 μmol Zn2+/g. RSM appears to be a better tool for the evaluation of interaction and competitive effects in binary systems than both the simple extrapolation from single-component systems and experimentally difficult study of multi-component systems.

Some Results of the Spectroscopic Study of Four Close Binary Systems of Early Spectral Types

1965 ◽  
Vol 5 ◽  
pp. 120-130
Author(s):  
T. S. Galkina
Keyword(s):  
Spectroscopic Study ◽  
Spectral Type ◽  
Spectroscopic Investigation ◽  
Binary Systems ◽  
Quantitative Information ◽  
Close Binary ◽  
Physical Parameters ◽  
Absorption And Emission ◽  
Close Binary Systems ◽  
Quantitative Estimates

It is necessary to have quantitative estimates of the intensity of lines (both absorption and emission) to obtain the physical parameters of the atmosphere of components.Some years ago at the Crimean observatory we began the spectroscopic investigation of close binary systems of the early spectral type with components WR, Of, O, B to try and obtain more quantitative information from the study of the spectra of the components.

Quasi-Periodic Oscillations in Dwarf Novae

1979 ◽  
Vol 46 ◽  
pp. 77-88
Author(s):  
Edward L. Robinson
Keyword(s):  
Binary Systems ◽  
Outer Edge ◽  
Light Curves ◽  
Close Binary ◽  
Bright Spot ◽  
Dwarf Novae ◽  
Periodic Oscillations ◽  
High Frequencies ◽  
Short Period ◽  
Typical Time

Three distinct kinds of rapid variations have been detected in the light curves of dwarf novae: rapid flickering, short period coherent oscillations, and quasi-periodic oscillations. The rapid flickering is seen in the light curves of most, if not all, dwarf novae, and is especially apparent during minimum light between eruptions. The flickering has a typical time scale of a few minutes or less and a typical amplitude of about .1 mag. The flickering is completely random and unpredictable; the power spectrum of flickering shows only a slow decrease from low to high frequencies. The observations of U Gem by Warner and Nather (1971) showed conclusively that most of the flickering is produced by variations in the luminosity of the bright spot near the outer edge of the accretion disk around the white dwarf in these close binary systems.

Bence-albee after 25 years: A new superior α-factor correction procedure for the quantitative analysis of oxides and silicates

1992 ◽  
Vol 50 (2) ◽  
pp. 1744-1745
Author(s):  
John T. Armstrong
Keyword(s):  
Quantitative Analysis ◽  
Electron Microprobe ◽  
Binary Systems ◽  
Correction Procedure ◽  
Geological Samples ◽  
The Past ◽  
Large Matrix ◽  
Computational Speed ◽  
Microprobe Data ◽  
Geological Sciences

One of the most cited papers in the geological sciences has been that of Albee and Bence on the use of empirical " α -factors" to correct quantitative electron microprobe data. During the past 25 years this method has remained the most commonly used correction for geological samples, despite the facts that few investigators have actually determined empirical α-factors, but instead employ tables of calculated α-factors using one of the conventional "ZAF" correction programs; a number of investigators have shown that the assumption that an α-factor is constant in binary systems where there are large matrix corrections is incorrect (e.g, 2-3); and the procedure’s desirability in terms of program size and computational speed is much less important today because of developments in computing capabilities. The question thus exists whether it is time to honorably retire the Bence-Albee procedure and turn to more modern, robust correction methods. This paper proposes that, although it is perhaps time to retire the original Bence-Albee procedure, it should be replaced by a similar method based on compositiondependent polynomial α-factor expressions.

Fractionation of polymethylene chains: An electron crystallographic investigation

1986 ◽  
Vol 44 ◽  
pp. 794-795
Author(s):  
Douglas L. Dorset
Keyword(s):  
Cross Section ◽  
Binary Systems ◽  
Linear Chain ◽  
Pure Component ◽  
Organic Substrates ◽  
Crystallographic Investigation ◽  
X Ray Diffraction ◽  
X Ray ◽  
Molecular Sizes ◽  
The Stability

A variety of linear chain materials exist as polydisperse systems which are difficultly purified. The stability of continuous binary solid solutions assume that the Gibbs free energy of the solution is lower than that of either crystal component, a condition which includes such factors as relative molecular sizes and shapes and perhaps the symmetry of the pure component crystal structures.Although extensive studies of n-alkane miscibility have been carried out via powder X-ray diffraction of bulk samples we have begun to examine binary systems as single crystals, taking advantage of the well-known enhanced scattering cross section of matter for electrons and also the favorable projection of a paraffin crystal structure posited by epitaxial crystallization of such samples on organic substrates such as benzoic acid.

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