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Showing 3 results for Khosravani
Evaluation of spatial changes of arsenic in underground water resources of Sirjan basin
Mohsen Pourkhosravani, Fatemeh Jamshidi Gohari, Nasrin Sayari,
Volume 16, Issue 2 (9-2023)
Abstract
Background and Objective: This research tries to analyze the spatial distribution and trend of arsenic level changes in the underground water resources of the Sirjan basin, and also to evaluate and analyze the factors affecting the concentration of this element in these water resources.
Materials and Methods: Sampling of underground water sources in the study area was done by systematic-random method and arsenic concentration was done by ICP-MS method in the laboratory. Also, to evaluate the factors affecting the concentration of arsenic in the underground water resources of Sirjan bathe sin, the method of land systems analysis was used.
Results: The results of the research show that the amount of arsenic in all samples is higher than the Guidelines provided by the World Health Organization so the amount of this element in the underground water sources of the study area varies between 30 and 390 µg/L. Samples No. 9, 13, and 16, which are located in the deepest parts of the basin, have the highest amount of arsenic. For this reason, the durability of water in this part of the basin increases. This reduces the intensity of the current. As a result, according to the cumulative effect law, this process can lead to an increase in arsenic concentration.        
Conclusion: The evaluation of changes in the concentration of arsenic in the underground water resources of the study area indicates that the concentration of this element had a high increasing trend. According to the results, the location of the studied area in the center of hydrothermal and geothermal processes (copper mineralization belt in Iran), the cumulative effect, and the effect of pH on the absorption and desorption of arsenic are among the most important factors affecting the increase of arsenic in the underground water resources of Sirjan Basin.
 

A Study on the behavioral pattern of sustainable municipal food waste management in Tehran
Farhad Khosravani, Enayat Abbasi, Shahla Choobchian,
Volume 18, Issue 2 (9-2025)
Abstract
Background and Objective: Although cultural and educational challenges contribute to the rising levels of food waste, public participation plays a crucial role in its fundamental management. This study aims to investigate the significance of citizen engagement and to develop a behavioral model for sustainable household food waste management in Tehran.
Materials and Methods: This study adopts a quantitative research paradigm and was conducted using a survey method. The statistical population comprised 2,239,907 households in Tehran, from which a sample of 384 households was selected based on Krejcie and Morgan’s sampling table, using a stratified random sampling method with proportional allocation. Data were collected through a researcher-designed questionnaire, the content and face validity of which were confirmed by a panel of professors in agricultural extension and education, as well as experts in waste management. The reliability of the questionnaire was supported by Cronbach's alpha values ranging from 0.78 to 0.92. Path analysis using structural equation modeling (SEM) in LISREL software was employed to evaluate the predictive power of the independent variables on the dependent variable.
Results: According to the results of the path analysis and the R² statistic, the variables of citizens' intention toward sustainable food waste management, environmental attitude, environmental awareness and knowledge, place attachment, satisfaction, and social trust collectively explained 67% of the variance in citizens' participatory behavior related to sustainable food waste management.
Conclusion: The findings indicate that citizens' environmental awareness and attitudes play a significant role in their participation in sustainable food waste management. In other words, individuals with greater knowledge of the environmental consequences of food waste are more likely to adopt effective waste management practices. Therefore, the development and implementation of targeted educational programs aimed at enhancing public awareness and fostering positive environmental attitudes are essential. Such initiatives can significantly contribute to encouraging participatory behaviors in sustainable food waste management.
 

Technical, environmental and economic assessment of composting technology in municipal solid waste management: a case study of Tehran, 2023
Sara Ghobadi, Farhad Khosravani, Zohreh Bahmani,
Volume 18, Issue 3 (12-2025)
Abstract
Background and Objective: Managing municipal solid waste in megacities like Tehran, which generates approximately 8,500 tons of waste daily, presents significant environmental and economic challenges. Notably, biodegradable organic materials constitute an estimated 60–70% of this waste, necessitating effective management strategies to mitigate environmental impacts. This study aims to evaluate the technical feasibility, environmental benefits, and economic viability of implementing rapid composting technology as an innovative approach to managing Tehran's organic waste.​
Materials and Methods: A composting system with a daily processing capacity of 1,000 kilograms of organic waste was analyzed. Economic evaluation employed cost-benefit analysis, calculating financial indicators such as Net Present Value, Internal Rate of Return, Payback Period, and Profitability Index.
Results: The rapid composting technology demonstrated an NPV of 56.6 billion Iranian Rials, an IRR of 20.48%, and a PBP of 3 years and 5 months. The PI was calculated at 3.52, indicating strong economic attractiveness. Environmentally, this technology contributes to reducing landfill volume, lowering greenhouse gas emissions, producing high-quality compost, and decreasing reliance on chemical fertilizers.​
Conclusion: Implementing rapid composting technology for processing 1,000 kilograms of organic waste daily in a residential complex of 2,000 inhabitants in Tehran is both economically and environmentally justifiable. This approach offers a practical and sustainable solution for urban organic waste management.
 

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