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Articles by Nader Shariatmadari
Total Records ( 3 ) for Nader Shariatmadari
  Afshin Asadi , Bujang B.K. Huat , M.M. Hassim , Thamer A. Mohamed , M.M. Hanafi and Nader Shariatmadari
  Organic soils or peat represent an accumulation of disintegrated plant remains which have been preserved under condition of incomplete aeration and high water content. In order to develop a fundamental understanding of electroosmotic phenomena in peat, initially microelectrophoresis studies were carried out to conceptualize the electrokinetic phenomena. Then electroosmosis experiments were conducted on rigid cube samples containing 0.0001 M NaCl-water saturated peat. The open-anode and open-cathode systems were employed to the soil samples. Distilled Water (DW) were used as anolyte and catholyte. The experiments were carried out via applications of diffrent DC electrical potentials. The results of microelectrophoresis study showed changes of zeta potential due to the effect of HCl and NaOH. The correlations between zeta potential and pH were found. The negative charge of peat is high pH dependent and the surface charge was dropped to zero at pH around 3. The high degree of decomposition resulted in the higher zeta potential in peat. It was also experimentally found that the electroosmotic flow in peat is feasible. The direction of electroosmotic flows were from the anode to cathode.
  Nader Shariatmadari , Mohammad Reza Sabour , Hamidreza Kamalan , Arash Mansouri and Mostafa Abolfazlzadeh
  The aim of this study is utilizing weighted residual method, a kind of numerical models, which leads to a simpler model for users. Utilizing the simplified numerical models helps landfill owners and decision makers for an easier understanding of methane emission. In this study, three different numerical models with five bench marks have been developed to estimate methane gas generation of a considered landfill: (i) linear polynomial function for boundaries and trail function, (ii) linear function for trail and second order polynomial function for boundaries satisfaction and (iii) second order polynomial function for boundaries satisfaction and Sin shape function for trail function. Second one as the best fitted one with SD of 0.76 has been selected.
  Nader Shariatmadari , M.A. Abdoli , Hossein Ghiasinejad and Peyman Alimohammadi
  This study investigated the applicability of the HELP model in arid areas, by construction of two 35x25 m test cells in Kahrizak landfill (longitude = 51°, 20′, latitude = 35° 27′ degrees) and monitoring the real leachate generation from each one. A set of field capacity and saturated water conductivity tests were also performed to determine basic hydrologic properties of municipal waste landfilled. A comparison was made between values calculated by HELP model and recorded values, shows that a prediction of leachate on annual basis can be done by HELP model with acceptable accuracy but when the infiltration of water to waste body increase due to leachate production, the model intents to underestimate water storage capacity of the landfill, which lead to deviation of calculated values from real ones.
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