The Journal of

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 Background: Advanced oxidation processes such as Fenton and photo-Fenton that have been applied effectively to oxide the persistent organic compounds in leachate and converts them to unharmful materials and final products. However, there are a few data about application of Fenton-like process in leachate treatment. Therefore, the aim of this study was to treat the municipal landfill leachate by above processes..

 Methods: This study was an experimental study that was conducted with set up a pilot system. The used leachate collected from a municipal unsanitary landfill of Qaem-shahr city that located in Mazandaran province. All examinations and samples were analyzed according to Stndard Methods for the Examination of Water and Wastewater.

 Results: The results showed that the conventional coagulation & flocculation process with chloride ferric removed about 45% of COD in optimum conditions. The combining of pretratment with AOPs significantly increased removal efficiency so that the removal efficiency COD for Fenton, photo-Fenton and modified fenton processes was 89, 85.45 and 81.82 percent in the same conditions, respectively. After all processes, the biodegradability (BOD₅/COD ratio) of treated leachate compared to raw leachate was increased and the highest increasing of BOD₅/COD ratio was in the photo-Fenton process.

 Conclusion: The efficiency of the Fenton-like process is less than Fenton and photo-Fenton processes. Instead, the Fenton-like process was done at the higher pH and will not have these problems.

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Introduction: Selecting an appropriate landfill site is regarded as one of the most complicated and most difficult stages in the solid waste management, since a great number of environmental, technical, economical, social, and cultural factors should be taken into consideration simultaneously. Therefore, this study aimed to select a suitable landfill site for Municipal Solid Waste (MSW) of Lali city. 

Methods: AHP and TOPSIS models as well as Geographic Information Systems (GIS) were used in regard with selecting a landfill site. Six regions were identified as landfills taking 11 criteria into account in AHP model. Then, TOPSIS model was utilized in order to rank the landfills based on their priority. The best landfill site option was selected with considering 8 new criteria which were determined from similar studies, field visits and experts’ ideas.

Results: Since AHP was used for weighting and TOPSIS (a multi-criteria decision making method) was applied for ranking the selected options. Finally, option 4 (located in Khaje Abad village) could obtain the first rank and was introduced as the MSW landfill site of Lali city.

Conclusion: The study findings revealed that consolidated use of AHP model and TOPSIS model could be perceived as an appropriate method in order to identify the MSW landfill site.

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Introduction: Waste production from any source would lead to the formation of various pollutants. The existence of these materials and in turn, every non-normative plan designed for waste disposal produces environmentally detrimental effects. Therefore, evaluating positive and negative effects of influential engineering- sanitary projects in environment seem to be necessary such as landfill construction for management of urban health. The present study aimed to evaluate positioning and of municipal solid waste landfills by geological information system (GIS). To this purpose, the required layers were prepared and profit sites were obtained by 3 steps: talent mapping, field survey to study characteristics of suitable areas and EIA by means of Leopold matrix for zonal ranking and selection of optimal location.

Results: To depict talent map, the layers were combined by simple additive weighting method using various data including geology, land use, distance from the city boundaries, slope, distance from roads, vegetation, infiltration and hydrology. The resulted data suggested that four sites were posited in appropriate ranks.

Conclusion: The study findings revealed, that site No.1 (X:256915 & Y:3540127) was determined as the optimum location for engineering - Sanitary landfill.

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Introduction: The increasing development of urban life is one of the fundamental challenges in urban management of waste disposal. Solid municipal waste is one of the major problems of governments and urban planners worldwide, especially in coastal cities. This study aimed to design of an advanced linear planning algorithm for coastal landfills with a focus on safety, health, and environmental risks.
Method: This is a qualitative study. Multi-objective optimization presents a mathematical model by evaluating the three risks of health, safety, and environment. First, the data were collected using interviews and qualitative analysis, and then in the second stage, the analysis was presented using model linear planning.
Results: In the risk assessment of the landfill site, the presented computational results can be found that stable models provide unfavorable answers compared to definitive models. This is a natural issue; since in stable models, the worst case scenario is considered to achieve the optimal solution, and therefore the resulting answers are always unfavorable compared to the definitive models.
Conclusion: By analyzing the risk assessment at the landfill site, the causes of accidents and complications resulting from work in this place include unsafe practices or unsafe and unsanitary conditions. In fact, trying to create and improve health, safety, and environmental conditions of landfills in Bandar Abbas city and the increase in reliability confirmed that these two factors are the secondary causes of accidents. The root causes can be considered as a defect in the management system of the landfill site.