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- 저자 : Sama Amiri (검색결과 2 건)
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Hamid Amiri,Ehsan Daneshvar,Sama Azadi,Samira Azadi 대한환경공학회 2022 Environmental Engineering Research Vol.27 No.5
The cement industry is considered as a major source of heavy metals pollution in topsoil. This study aims at measuring the heavy metal contamination level in the vicinity of Shiraz cement factory, and assessing the ecological and environmental risks associated with the factory"s activities in the surrounding topsoil. To do so, 10 samples of soil were taken from around the Shiraz cement factory at the depth of 0-10 cm and the concentration of some heavy metals including Al, Cd, Ni, and Pb was measured. Enrichment factor (EF), geo-accumulation (Igeo), and pollution load (PLI) indices were used to assess the ecological risk of heavy metals.Based on the results, the mean concentration of Al, Ni, Cd, and Pb was 6,937.14, 88.09, 1.96, and 30.74 mg/kg, respectively. The EF results showed that due to anthropogenic activities, the Ni, Pb, and Cd element has moderate, severe, and very severe enrichment in the study area, respectively. The Igeo result for Al, Ni, Pb, and Cd was -0.82, -0.17, 0.16, and 0.68, respectively, which indicates non- to slightly pollution of these heavy metals in this region. The mean PLI in the study area was 1.4 indicating the low to medium pollution of heavy metal. The results of this study can be useful in determining and investigating the environmental effects of Shiraz cement factory.
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Mahmoud Reza Sohrabi,Sama Amiri,Hamid Reza Fard Masoumi,Mina Moghri 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.4
Zero-valent iron nanoparticles were synthesized, for removal of Direct Yellow 12 dye. The experiments were designed by response surface methodology. Quadratic model was used to predict the variables. Analysis of variance was used for investigation of variables and interaction between them. High F-value (10.01), very low P-value (<0.0001), non-significant lack of fit, the determination coefficient (R2 = 0.903) and the adequate precision (10.82) demonstrate good correlation between experimental and predicted values of the response. The highest removal percent (90.02%) was attained, and the optimum parameters are achieved: catalyst amount (0.31 w/w%), initial concentration (40 mg/l), reaction time (105.35 s) and pH (5.23).
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