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Articles by S.M. El-Said
Total Records ( 2 ) for S.M. El-Said
  S.M. El-Said , M.B.S. Alamri , Ali-Bin Saleh El-Barak and O. Alsogair
  This study was focused on Nigella sativa Linn. as an alternative absorbent in order to remove As (III) and arsenate As (V) from synthetic waste water. As such, Nigella sativa L. was collected from Burydah A-Qassim. Batch experiments were conducted to determine the adsorptive efficiency of Nigella sativa L. to remove As (III) and arsenate As (V) from waste water. The preliminary experiments were revealed that alkaline solutions (pH>9) without Nigella sativa L. caused homogeneous oxidation of As (III) to As (V) so the adsorption process was investigated at pH range 2-8. The batch experiments were revealed that adsorption of As ion on Nigella sativa L. was maximal at low pH (at a 3.0) value. The adsorption studies revealed that the ongoing adsorption validates Langmuir adsorption isotherms at temperatures 25, 35 and 45°C. The adsorption isotherm data was also employed to calculate the thermodynamic parameter of Gibb’s free energy which gives a negative value for the adsorption of As ion on Nigella sativa L. The negative values of free energy indicate the feasibility and spontaneous nature of the adsorption process. From these results, it can be concluded that the Nigella sativa L. could be a good adsorbent for the removal of cationic metals coming from waste water.
  A.B.S. Al-Barak and S.M. El-Said
  Most available technologies applied in the removal of metal contaminants in aqueous systems use the well established processes of adsorption. Adsorbents currently in use are either too expensive or not readily available for waste water treatment. There is a need to develop new adsorbents which are readily available at low cost to remove metal contaminants in aqueous system. In this work, okra wastes as a food canning processes by products were used as a potential adsorption of cadmium (II), iron (II) and zinc (II) removal from various aqueous solutions. Qualitative and quantitative analysis of okra wastes were investigated. Infrared spectra of the okra wastes were recorded to detect the function group that gained the capabilities of okra wastes for metal ion adsorption. Batch studies were performed to evaluate the adsorption process and it was found that the okra wastes were found to adsorb 96.4% of cadmium (II), 93.8% of iron (II) and 79.8% zinc (II). The rate of adsorption follows pseudo-second order kinetics before attaining equilibrium. This work proved that okra wastes can be used as an efficient adsorbent material for removal of heavy metals from water and waste water.
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