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Articles by S.B. Mortazavi
Total Records ( 4 ) for S.B. Mortazavi
  S.B. Mortazavi , A. Nikpey , A. Rezaee , H. Asilian , A. Khavanin and H. Kazemian
  Methyl tert-butyl ether (MTBE) is added to reformulated gasoline to meet the 1990 Clean Air Act directives. Widespread use of MTBE in gasoline has resulted in groundwater contamination. Because of its undesirable effects on drinking water and ecologically harmful effects, MTBE removal has become a public health and environmental concern. In this study, we have isolated a mixed bacterial culture which is capable of degrading the MTBE as a sole carbon and energy source. This consortium was developed from mixed urban and petrochemical activated sludge after 4 month's enrichment. Enrichment was conducted in batch reactor, fitted with a screw cap and butyl rubber septum. MTBE concentration was measured in head space by gas chromatography. Degradation was determined by MTBE removal. MTBE biodegradation was depended to Dissolved Oxygen (DO) concentration and not affected by the changes in concentration of trace element solution or other stimulator Substances. Degradation rates were nearly 1.478 mg MTBE h¯11 (wet biomass) and didn’t change with MTBE concentration (up 500 mg L¯1).
  A. Rezaee , J. Derayat , S.B. Mortazavi , Y. Yamini and M.T. Jafarzadeh
  In this study, the removal of mercury ions by cellulose of Acetobacter xylinum was investigated in the synthetic and chlor-alkali wastewater. Biofilms of Acetobacter xylinum were grown in laboratory column bioreactors. The biofilms were continuously treated with sterile synthetic model wastewater or nonsterile, neutralized chloralkali wastewater.The extent of adsorption was studied as function of pH, adsorbent dose and contact time. Efficiency of mercury ion removal from chlor-alkali industry wastewater by aluminum sulfate and ferric chloride was also determined. Under acidic condition the adsorption of mercury by cellulose was quite low and increasing processing time more than10min has no remarkably effect on the adsorption rate. Adsorption capacity of cellulose under dynamic condition for chlor-alkali wastewater was 65μg/g which was less than the value (80μg/g) that obtained from batch adsorption experiments for synthetic wastewater.
  J.M. Kanaani , S.B. Mortazavi , A. Khavanin , R. Mirzai , Y. Rasulzadeh and M. Mansurizadeh
  The objective of this study is to determine the foot anthropometric data's for some Iranian men to apply in medicine and design of foot equipments. In this study, the foot images of 160 Iranian men, with ages ranging from 18 to 25 years old were taken by a digital camera and the values of 8 dimensions of the foot were extracted with software for each individual. Finally the results were analyzed by SPSS. The average values, standard deviation, the smallest and largest values, the 5th, 50th and 95th percentiles of the 8 dimensions were calculated. For example Mean±SD for length, width and Biomlleolar Breadth of the foot were obtained 264.66±13.10, 106.84±5.64 and 74.47±4.11 mL. The correlation coefficients were found between different dimensions. It was determined that there is significant correlation between 85% of foot dimensions (p<0.05). In this study, for the first time the values of 8 important foot dimensions were obtained in Iran that will serve as a basis for design and sizing of shoes and other foot equipments. It is recommended that similar studies to be done with considering race, life style and job for the purpose of medical goals and ergonomic designs.
  S.B. Mortazavi , A. Khavanin , G. Moussavi and A. Azhdarpoor
  The objective of this study was to investigate the removal of an anionic surfactant from wastewater in ICEAS. The surfactant considered here was anionic SDS being widely used in the household and industrial detergents. Basic wastewater COD was 260 mg L-1 and SDS surfactant added in range 20 to 400 mg L -1. The effect of the inlet SDS concentration and reaction time on COD and SDS removal was investigated. The results from this study indicated that the aeration time of 2 h was sufficient for removal of SDS ranged 20 to 400 mg L-1. Obtained data showed low effluent SDS concentrations of 0.3 to 5 mg L-1 and removal of SDS was more than 98%. These results revealed that biological treatment using ICEAS process is capable to treating wastewaters containing high concentration of SDS surfactant.
 
 
 
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