List of Articles سرب

• Open Access Article
  • Abstract Page
  • Full-Text
  
  1 - Removal of lead with metallic organic nanostructures of iron and benzene tricarboxylate from aqueous solution
  reza alizadeh
  Heavy metals are not chemically degraded, in order to prevent the entry and accumulation of this toxic pollutant along with factory effluents into the environment, so far, different methods have been used, but finding new methods with more efficiency in this area is nec More

  Heavy metals are not chemically degraded, in order to prevent the entry and accumulation of this toxic pollutant along with factory effluents into the environment, so far, different methods have been used, but finding new methods with more efficiency in this area is necessary. In this research, a new class of compounds called organic metallic materials has been used to remove industrial effluent lead. These organic metallic materials contain iron and benzene tricarboxylate. To identify the characteristics of these materials, electron microscope images and Nitrogen adsorption and desorption isotherms has been used. To determine the optimal conditions for using these materials for lead removal from the effluent, the effect of parameters: time (10-120 min), the amount of adsorbent (0.2-0.5 mg/L), pH (3.5 -12.5) and temperature (10-75 ° C) were evaluated. The results show that the composition of MIL-100 (Fe) has a better performance than the other materials in this study and complete removal of lead was achieved with an initial concentration of 10 mg/l and an adsorbent dose of 0.25 mg / l, at a temperature of 50 ° C, pH =4.3 and contact time of 120 min. Other properties of this material in removal of industrial effluent lead such as magnetic properties, reusability in five consecutive periods, large surface area, low cost, high efficiency and easy to use, make it an ideal option for large-scale use. Manuscript profile
• Open Access Article
  • Abstract Page
  • Full-Text
  
  2 - Examining the amount of cadmium and lead in the soil downstream of Taybad landfill
  akram ghorbani Mohammad ghafori Mohammad javad alipoor
  20.1001.1.26763060.1402.8.13.3.4
  The aim of this study was to investigate the emission of heavy metals (cadmium and lead) in the soil around Taybad landfill. For this purpose, 15 stations at a distance of 100 meters from each other to the landfill of Taybad city were selected for sampling. Sampling 5 s More

  The aim of this study was to investigate the emission of heavy metals (cadmium and lead) in the soil around Taybad landfill. For this purpose, 15 stations at a distance of 100 meters from each other to the landfill of Taybad city were selected for sampling. Sampling 5 samples and repeating 3 times from each station, the samples were transferred to the laboratory for analysis to check the level of pollution indicators. Hypotheses were analyzed using one-sample t-test and Pearson's correlation coefficient with spss 24 software. It was found that the average total concentration of lead is equal to 52.04 and the average total concentration of cadmium is equal to 1.748. The concentration of the mentioned metals is significantly higher than the average global soil and earth's crust with 95% confidence. In the case of lead and cadmium, the highest contamination was in station 10 and 4, and the lowest contamination was in station 6 and 12, respectively. It is concluded that the amount of soil contamination does not change significantly with increasing distance, because the volume and concentration of contaminant runoff from the landfill (contaminant) along the path is constant. Therefore, it is better to provide environmental training for municipal municipal personnel and citizens of the region and to invest in the restoration of the environment and its further protection. Manuscript profile