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Articles by Saad A. Al-Jlil
Total Records ( 9 ) for Saad A. Al-Jlil
  Saad A. Al-Jlil
  The objective of this study was to determine COD and BOD reduction from domestic wastewater using sedimentation, aeration, activated sludge, sand filter and activated carbon. Mean maximum COD and BOD reduction was 92.17 and 97.66%, respectively. Other water quality parameters such as TSS, TDS, NO2, TKN and PO4 showed significant reduction except NO3 which increased significantly using different materials in the Wastewater Treatment Plant (WTP). The sewage treatment system using different materials showed excellent potential for COD and BOD removal from domestic wastewater. Also, the concentration level of COD and BOD in the treated water was within the permissible limits for industrial cooling and agriculture use especially for landscape development.
  Saad A. Al-Jlil and Fares D. Alsewailem
  A local clay from Baha Region Southwest of Saudi Arabia was characterized and tested for its ability to adsorb lead ions from aqueous solutions. The adsorption capacity of the acid treated clay did not increase as compared to the untreated clay due to significant reduction in peak intensities at 2θ = 12 for the acid treated clays as shown from XRD characterization. The increase in temperature caused an increase in the lead adsorption capacity of clay. The maximum adsorption capacity of clay was 29.25 mg g-1 at 80°C. It was observed that the adsorption system is endothermic. Also, the randomness of the system increased during the adsorption of lead ions on Baha clay. A comparison between Langmuir and Freundlich models at different temperatures showed that the Langmuir model described the experimental data better than the Freundlich model.
  Saad A. Al-Jlil
  The main objective of this study was to compare a newly developed isotherm model (Saad isotherm model, SIM) with five conventional isotherm models (Langmuir, Freundlich, Langmuir-Freundlich, BET and Toth) for adsorption of cobalt (Co) ion on a specified adsorbent. The Saad isotherm model fitted well the experimental data from three types of activated and non-activated Saudi clays. The Langmuir isotherm model agreed well with the experimental data of Khiber clay and Bahhah clayactivated by H2O2, NaCl and H2O4. While the Frendlich model and Langmuir-Frendlich model fitted well the experimental data of natural Tabbuk clay, activated Tabbuk clay by NaCl and the natural Bahhah clay. In conclusion, the Frendlich model fitted well the experimental data of Tabbuk clay activated by H2O2 and H2O4. Besides, the BET model did not describe the experimental data well of the three types of activated clays.
  Saad A. Al-Jlil and Omar A. Alharbi
  The main objective of this study was to remove heavy metals from wastewater by two different wastewater treatment methods namely reverse osmosis and adsorption (Saudi bentonite clay as adsorbent) process. The concentration levels of heavy metals such as Co, As, Cd and Cr in wastewater in Riyadh were above the maximum recommended limits for crop production. The comparison showed that the minimum removal efficiency of heavy metal ions was 88.89% with adsorption process (Saudi bentonite clay) and 87.92% by Reverse Osmosis (RO) method. Moreover, the concentration level of the heavy metals in the treated wastewater was within the recommended permissible limits for crop production. The study provided an excellent potential for using local adsorbent material such as Saudi bentonite clay for wastewater treatment on economical basis.
  Saad A. Al-Jlil , Yasser A. Haridi and Mohammad Sajid Latif
  In Saudi Arabia, availability of safe drinking water is a burning issue due to high salinity of groundwater used for various purposes. The main objective of this study was to study saline water desalination by a batch containing 3-compartment electrodialysis cell under local conditions. The experimental treatments were the initial concentration of sodium chloride (NaCl) solution in the system and the position of anode electrode and cathode electrode in the compartment with respect to the ion exchange membranes. The relationship between the I and V was very poor with a value of around 3 V and became almost linear when the V increased from 3 and above in the electrodialysis cell used for desalination. It was found that only limited current (amperes) reached to anode and cathode compartments especially when the saline solution was highly concentrated in the middle compartment of the batch containing 3-compartment electrodialysis cell. It was suggested to redesign the electrodialysis cell with 4-compartments instead of 3-compartments with a reduced size of the cell, to avoid its adverse effect on the path of desalination process. The study findings suggested more elaborated investigations using waters of different salt concentrations for system efficiency.
  Saad A. Al-Jlil
  The main objective of this study was to characterize Bentonite natural clay from West of Saudi Arabia and evaluate its performance for lead ions adsorption from wastewater at different temperatures. It was found that the adsorption capacity of Bentonite clay increased by increasing the temperature of the system. The Langmuir model described the experimental data at different temperatures very well. The maximum adsorption capacity of Bentonite clay was 51.19 mg g-1 at 20°C and 54.62 mg g-1 at 80°C. The thermodynamic parameters such as enthalpy, entropy and Gibes energy were also obtained. The results showed that the adsorption is endothermic and favorable at high temperatures. The kinetics of lead ions on Bentonite clay was determined. The mathematical models, to characterize experimental results for the batch systems, included the resistance models based on external mass transfer and internal mass diffusion. The kinetic model based on external mass transfer predicted the experimental adsorption behavior for only a short time. A novel diffusion model called as Saad Internal Diffusion Model (SIDM) was obtained to calculate the internal diffusion coefficient in a batch adsorber. It was observed that the internal mass diffusion is a major rate-controlling step during the lead ions removal process from wastewater. The economic study based on adsorption capacity showed potential feasibility of using Bentonite clay as an alternative to activated carbon for lead ions removal from wastewaters.
  Saad A. Al-Jlil
  Date pits from Al-Qassim region, Saudi Arabia were collected, roasted and characterized for the adsorption of cobalt ions from wastewater. Also, the effect of pH of solution and different temperatures on the adsorption of cobalt ions by roasted date pits were studied. The adsorption capacity of roasted date pits decreased with an increase in the temperature of adsorption systems. The Langmuir, Freundlich, Redlich-Peterson and Thoth models were applied. It was found that, the Langmuir and Redlich-Peterson models explained the experimental data very well at different temperatures. The mean maximum adsorption capacity of roasted date pits for Co ions was 6.28 mg g-1 at 20°C and 4.11 mg g-1 at 80°C. Overall, the adsorption phenomena of Co ions is an exothermic and non-spontaneous process.
  Saad A. Al-Jlil
  The main objective of this study was to characterize the Bentonite clay collected from West of Saudi Arabia and investigate its potential for the adsorption of chromium (Cr) and lead (Pb) ions from wastewater. Application of Saad models described the experimental data very well. The maximum adsorption capacity of Bentonite clay was 13.79 mg g-1 for chromium and 51.19 mg g-1 for lead ion. The results for the effect of different agitation speed and the initial concentrations on adsorption of Cr and Pb ions on Bentonite clay showed that increasing the agitation speed increased the adsorption rate of metal ions on Bentonite clay. The kinetics of chromium and lead ions on Bentonite clay were also determined. A novel diffusion model called as the Saad Two Resistances Internal Diffusion Model (STRIDM) was used to calculate the time constant in a batch adsorber. It was found that the internal mass diffusion is a major rate-controlling step for maximum removal of chromium and lead ions from wastewater.
  Saad A. Al-Jlil
  The main objective of this study was to remove heavy metals such as Cu, Co, Zn, Pb, As, Cd and Cr from industrial wastewater by adsorption using local bentonite clay and roasted date pits. The concentration level of various heavy metals in the industrial wastewater of Riyadh City was above the permissible recommended limits. The minimum removal efficiency of the adsorption of metal ions on bentonite clay and roasted date pits was 97%. Also, the concentration level of hazardous heavy metals in the treated water was within the permissible limits for crop production. The study showed good potential for removing heavy metal ions from industrial wastewater by adsorption using local bentonite clay and roasted date pits.
 
 
 
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