List of Articles Roya mafigholami

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  1 - Comparison of the Efficiency of Fe3O4 Magnetite Nanoparticles and Zero-valent Iron Nanoparticles in the Advanced Oxidation Process Based on Diproxipersulfate in Sewage Treatment of Leather Industry
  Seyed mohsen Beladi roya mafigholami Ali Hashemi zavareh
  Background and Objective: Industrial wastewater treatment is more difficult than urban sewage due to the presence of various pollutants. Sewage produced in the leather industry should be treated to the environment due to having a pollution load and the presence of high More

  Background and Objective: Industrial wastewater treatment is more difficult than urban sewage due to the presence of various pollutants. Sewage produced in the leather industry should be treated to the environment due to having a pollution load and the presence of high chloride ion before discharge. The advanced oxidation process based on dioxy persulfate is considered a new process in the presence of active agents. This process has a great capability in wastewater treatment with high pollution. In this study, the anion process of persulfate was used with the activation of magnetic iron (Fe3O4) and zero-valent iron at laboratory scale in order to treat and reduce the organic load (COD) waste water of leather industry. Material and Methodology: In this process, the effect of primary pH variables of wastewater (5-9), reaction time (0-60 minutes), Anion concentration of persulfate (50-200 mg per liter) and the amount of iron-containing nanoparticles (0.5-2 grams per liter) were investigated. Findings: The best conditions of the advanced oxidation process in the presence of zero-valent iron include pH 3، The amount of magnetic iron nanoparticles was equal to one gram per liter and the amount of dioxy persulfate was equal to 100 mg per liter. During the mentioned conditions, the efficiency of the process was achieved by 85 percent. The findings revealed that the initial COD (COD process reduced 3,700 milligrams per liter to below 1,000 milligrams per liter ¬COD final to 555 milligrams per liter. Discussion and Conclusion: Advanced oxidation process based on dioxy persulfate in the presence of iron compounds (zero-valent iron and magnetic iron) due to high performance (removal of 85 percent of primary COD and reduction to 555 milligrams per liter, can be used for decomposition and mineralization of pollutants, pollutants, water, especially industrial sewage. The effluent from this system can be drained into municipal wastewater treatment plants, so by reducing COD to 555 mg per liter, it still cannot be used alone. Manuscript profile
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  2 - The efficiency of combined process of electrocoagulation with iron electrodes and a filter columns containing pumice in removing chromium and cyanide from the wastewater of Safa Dasht industrial estate
  Seyed mohsen Beladi roya mafigholami mehrad m,ehrdadian
  Background and Objectives: Nowadays, environmental preservation is considered a necessary matter for society. Industrial wastewater treatment requires various effective processes, due to their unique physicochemical characteristics. The quality and quantity of industria More

  Background and Objectives: Nowadays, environmental preservation is considered a necessary matter for society. Industrial wastewater treatment requires various effective processes, due to their unique physicochemical characteristics. The quality and quantity of industrial wastewater are more complicated than human wastewater due to the presence of various industries and must be treated before being discharged into the environment due to their high pollution load. One of the common pollutants in industrial wastewater is heavy metals. The electrocoagulation and filtration process, as an environmentally friendly and integrated process, have a high capability in treating wastewater with high levels of pollution. Material and Methodology: In this study, the electrocoagulation process was used on a laboratory scale to remove chromium (hexavalent) and cyanide metal pollutants. In this process, the effect of various parameters, including the initial pH of the wastewater (5-9), reaction time (0-60 minutes), applied electric current (1-3 Amps), and filtration bed height (10-30 cm) were investigated. Findings: Based on the obtained results, the best conditions for the electrocoagulation process include a pH of 7, a reaction time of 60 minutes, an applied electric current of 3 Amps, and a filter bed height of 30 cm. Under these optimal conditions, the removal efficiency of chromium and cyanide was 92% and 88%, respectively. In this way, in the determined optimal conditions, the concentration of chromium and cyanide decreased from 13 and 0.908 mg/L to 1.56 and 0.72 mg/L, respectively. Discussion and Conclusion: Based on the standards provided by Iran's Environmental Protection Organization, treated wastewater has the ability to be discharged into the environment. Manuscript profile