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Articles by A. Eslami
Total Records ( 6 ) for A. Eslami
  A. H. Mahvi , A. Maleki and A. Eslami
  The potential of rice husk and rice husk ash for phenol adsorption from aqueous solution was studied. Batch kinetics and isotherm studies were carried out under varying experimental conditions of contact time, phenol concentration, adsorbent dose and pH. Adsorption equilibrium of rice husk and rice husk ash was reached within 6 hr for phenolic concentration 150-500 μg/L and 3 hr for phenol concentration 500-1300 μg/L, respectively. Kinetics of adsorption obeyed a first-order rate equation. The adsorption of phenol increases with increasing the solution pH value. The suitability of the Freundlich and Langmuir adsorption models to the equilibrium data were investigated for each phenol-sorbent system. The results showed that the equilibrium data for all the phenol-sorbent systems fitted the Freundlich model best within the concentration range studied. A comparative study showed that rice husk ash is very effective than rice husk for phenol removal. The studies showed that the rice husk ash can be used as an efficient adsorbent material for removal of phenolic from water and wastewater.
  A. Eslami , S. Nasseri , B. Yadollahi , A. Mesdaghinia , F. Vaezi and R. Nabizadeh
  The oxygenate methyl tert-butyl ether is added to gasoline to increase the octane level and to reduce carbon monoxide and hydrocarbon emissions by vehicles. The high mobility, water solubility, and resistance to natural attenuation associated with methyl tert-butyl ether may result in contamination of ground and surface waters. In this research the degradation of aqueous methyl tert-butyl ether at relatively high concentrations was investigated by UV-vis/TiO2/H2O2 photocatalytic process. The effect of important operational parameters such as pH, amount of H2O2, catalyst loading, and irradiation time were also studied. Concentrations of methyl tert-butyl ether and intermediates such as tert-butyl formate and tert-butyl alcohol were measured over a 180 min period using a gas chromatograph equipped with flame ionization detector and combined with headspace sampler. Results showed that the time required for complete degradation increased from 30 to 180min, when the initial concentration was increased from 10 to 500mg/L. The first order rate constant for degradation of methyl tert-butyl ether from the hydroxyl radical was estimated to be 0.177 to 0.022 1/min as the concentration increased from 10 to 500mg/L. Study on the overall mineralization monitored by total organic carbon (TOC) analysis showed that in the initial concentration of 100mg/L methyl tert-butyl ether, complete mineralization was obtained after 110min under UV-vis/TiO2/H2O2 photocatalytic process.
  A. Eslami and M. Roshani
  This study has been emphasized on ecotourism theory in Southern Caspian Sea, 25 watershed (shemrood), Guilan Province. Firstly, for ecotourism development, the study region divided to 3 zones: plain, forest and rangeland. Then using layers overlay determined decentralize and centralize sites, based on slope, aspect and without plant space by means of Arc GIS software. Finally, with considering of the all conditions, tourists decentralize and centralize settlement and access roads, 16 centralize sites located query in 3 regions.
  A. Eslami , Gh. R. Jahed Khaniki , M. Nurani , M. Mehrasbi , M. Peyda and R. Azimi
  The study investigated the levels of five different heavy metals (Cd, Pb, Zn, Cr and As) in various vegetables including roots and leaves of radish (Raphanus sativus L.), leek (Allium ampeloprasum L.), sweet basil (Ocimum basilicum L.) and parsley (Petroselinum crispum) cultivated along the bank of river passing through the city of Zanjan. The contributions of the vegetable to the daily intake of the heavy metals from the vegetables were determined. Atomic absorption spectrometry was used to estimate and evaluate the levels of these metals in the vegetables. The results of this survey showed the following ranges (mg kgG1): 3.89-32.94, 3.15-27.68, 43.61-223.10, non-detectable and non-detectable for lead, cadmium, zinc, chromium and arsenic, respectively. Some vegetables contaminated high levels beyond the levels given by FAO and WHO for human consumption. When the mean levels of Lead and Cadmium (10.65 and 9.22 mg kgG1) were taken into account the daily intake contribution of the metals was found to be 2.32 and 2 mg for Lead and Cadmium. Increase in vegetable consumption by community the situation could worse in the future.
  A. Eslami , M. Roshani and M. Hassani
  The present study is conducted at the Shemroud water shade, Guilan province, which is located in north region of Iran. In order to investigation on ecological requirement of 16 species using GIS, the environmental conditions were determined in study site including elevation, slope, aspect, climate and soil. With concerning of importance of their categories, t he maps were classified with range of 1 to 9. The suitable environmental conditions for growth species assigned 9 value and unsuitable conditions for growth species assigned lower values gradually. Using Analytical Hierarchy Process (AHP) method, the maps were weighted with regard to mentioned affecting factors. Obtained results showed that there is different appearance for ecological range in per species. Finally, it was extracted final map model for afforestation using mathematical relationships and merging ecological models for each species.
  Sh. Ranjbar-Bahadori , S. Lotfollahzadeh , G. Vaezi and A. Eslami
  This study examined official data on the incidence of human CE during the period 1999-2005 as case series study and studied routine hospital records in the main surgical hospitals in different provinces in Iran that were collected using a case report form. Human CE in 806 cases from 42 hospitals in 28 provinces of Iran was recorded. The highest CE rate was showed in Semnan Province. Females are more affected (54%). Infection was more in urban people (61%). Cases with age: 30-39 years old were the most infected (18.36%) and the highest rate of the infection to CE was showed in housewife people (47.77%). The majority of cysts were in the liver or lung. The liver (72.4%) was more involved than lung (18.1%), also cysts were found in the spleen (2.5%), abdomen (1.5%), brain (1.5%), both liver and lung (1%) and other organs (3%). 59.06% patients had a single cyst, 18.98% two cyst and in 21.96%, three cysts were found. Of these 806 cases, 58.56% had contact with dog in past. But there is no contact in 41.44%. Study on the probable origins of the infection to human CE was shown that vegetable was the most common (43.67%). For treatment of CE, 72.33% of patients had surgical interference, 12.90% of them received medical treatment and 14.77% of cases had both surgical and medical treatment. Finally, 99% of patients were cured and mortality in 1% of them cases was observed. Although human CE is endemic in Iran, it may control by a public health concern.
 
 
 
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