IJCPS_Vol 03 N 02

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    BIOSORPTION OF ORGANIC AND INORGANIC POLLUTANTS FROM SIMULATED WASTEWATER BY USING EQUISETUM HORSETAIL
    (جامعة الوادي - university of el oued, 2014) Abbas, H; Sulaymon, Hayfa'a; Swadi, L.
    Equisetum horsetail was used to poducebioadsorbent through easy and environmental friendly processes. This equisetum based biosorbent was evaluated for removal of Hg2+ and furfural from simulated wastewater using granule equisetum horsetail was investigated. Batch type experiments were carried out to find the equilibrium isotherm data for single and binary system. Many isotherm models were used for single component and binary system. Langmuir model gave the best fitting for the single system (R2 Fu = 0.9946 and R2Hg2+= 0.9935), while the binary system was fitted successfully with extended Langmuir model (R2 Fu = 0.9977and R2Hg2+ = 0.9969).Pseudo-first order, pseudo-second order, intra-particle diffusion and Elovich choose forkinetic study. Pseudosecond order model was well fitted for Hg2+ and furfural (R2 Fu = 0.9942 and R2Hg2+ = 0.9910). Thermodynamic parameters including the Gibbs free energy and enthalpy changes indicated that the biosorption of furfural and Hg2+ ions onto biosorbent was feasible, spontaneous and exothermic reactions. Significant desorption of Hg2+ and furfural from simulated wastewater were obtained when using 0.1M NaOH and HCl.
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    CONVECTION HEAT TRANSFER AND MAGNETOHYDRODYNAMICS STABILITYOF SWIRLING FLOWS IN CYLINDRICAL CONTAINER
    (جامعة الوادي - university of el oued, 2014) Boukhari, A; Khechekhouche, A; Bessaih, R
    In the present work, a study of the mixed convection flow of low Prandtl number fluid ( Pr  0.015 ) confined in a cylindrical container having an aspect ratio equal to 2, with and without magnetic fields, has been considered. The finite volumes method has been used to resolve the equations of continuity, momentum (or Navier-Stokes), energy and electric potential. In the absence of magnetic field, the numerical results obtained show the appearance of oscillatory instabilities for the values of the critical Reynolds number Re  2575,924,802, cr and606 , corresponding respectively to the values of the Richardson number Ri  0, 0.5, 1.0 and 2.0. However, in the presence of the vertical magnetic field, the fluid continues its stable flow until the values of Reynolds number greater than those predictable to have oscillatory instabilities. Stability diagrams have been established according to the numerical results of this investigation. These diagrams put in evidence the dependence of the critical Reynolds number and critical frequency of oscillations with the increase of the Hartmann number for various values of the Richardson number. In conclusion, the stabilizing technique of the mixed convection flows of fluids having low Prandtl number (semiconductors) by the application of an external magnetic field is practically reliable.
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    Study on the effect of Cetyltrimethylammonium bromide surfactant on static holdup and mother drops’ size in rotating disc columns
    (جامعة الوادي - university of el oued, 2014) Najafabadi, Mehdi Sattari
    Local and average static holdup and also mother drops’ size of dispersed phase in rotating disc column (RDC) and rotating sieved disc column (RSDC) have been investigated experimentally for water-kerosene chemical system. Experiments consist of five different CTAB concentrations in continuous phase and for each concentration five different rotor speeds. The presence of used surfactant in continuous phase not only reduced amounts of local and average static holdup in both columns, but it also greatly affected the variation process of local static holdup in the columns. Besides, CTAB reduced mother drops’ size in both columns. As rotor speed went up in RDC, local and average static holdup decreased. In RSDC column, enhancement of rotor speed from zero to 150 rpm caused increase of static holdup but when the speed of rotors went up more, this hydrodynamic parameter decreased
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    TRANSPORT PROPERTIES OF BINARY LIQUID MIXTURES IN MEK WITH BROMOBENZENE
    (جامعة الوادي - university of el oued, 2014) Reddy, SivaGolamari; Reddy, Mallu Maheswara; Chowdary, V.Swathi
    Viscosities and densities for MEK with Bromobenzene have been measured as a function of mole fraction at atmospheric pressure and at temperatures of 303.15 K, 308.15 K, and 313.15 K. The calculated deviations in viscosities and excess volumes were reported. McAllister’s three-bodyinteraction model, Krishnan and Laddha model and the Jouyban Acree model were used to correlate the kinematic viscosity of the systems. The excess volume data was fitted by means of the Redlich- Kister equation. It was found that in all cases the experimental data obtained fitted with the values correlated by the corresponding model very well.
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    TRANSPORT PROPERTIES OF BINARY LIQUID MIXTURES IN MEK WITH BROMOBENZENE
    (جامعة الوادي - university of el oued, 2014) Miloudi, Abdelmonem; Remini, Bouallem
    Viscosities and densities for MEK with Bromobenzene have been measured as a function of mole fraction at atmospheric pressure and at temperatures of 303.15 K, 308.15 K, and 313.15 K. The calculated deviations in viscosities and excess volumes were reported. McAllister’s three-bodyinteraction model, Krishnan and Laddha model and the Jouyban Acree model were used to correlate the kinematic viscosity of the systems. The excess volume data was fitted by means of the Redlich- Kister equation. It was found that in all cases the experimental data obtained fitted with the values correlated by the corresponding model very well