The complications of non-sanitary disposal and recycling of waste materials have become evident with the increase in population and development of urbanization and changing patterns of utilization and the widespread use of materials that are not easily decomposed. In this sense, in addition to manage the waste in a way that has the least risk for human health, must also respond to the wider needs of today's societies, which the most important terms are environmental sustainability , reuse and economic returns.
To carry out this project, the required information was provided by the municipality of Dezful, the Khuzestan Statistical and Metrological Organizations, field surveys, and the study of relevant guidelines and instructions and numerous books and articles. Using the Life Cycle Assessment (LCA) approach and IWM-2.0.6 software, methods of municipal solid waste management assessment in Dezful , impact and consequences of waste disposal options assessment has done. The studied area included the city of Dezful and some nearby towns which have common landfills with the city of Dezful. Therefore, five waste management scenarios were defined. The first scenario included only the burial option (current state); the second scenario included recycling, composting and burying options; the third, included recycling, anaerobic digestion and burial; the fourth scenario included recycle, compost, incineration with energy recovery and burial and last scenario was just like the previous scenario with the planning horizon amount of waste. The five impact groups included the resource depletion, greenhouse gases, acid gases, smog precursors and toxic emissions. An indicator parameter for each of these impacts was defined and weighted (with The MET method) so the ecological index for each scenario was obtained.
The results indicated that scenario 5 had the best performance in terms of resource depletion, smog precursors and toxic emissions. The forth Scenario in greenhouse gas emissions was the best-performing scenario and the best-performing scenario for acidic gases was the first scenario. In general, Scenario 1 had the largest and the scenario-5 had the smallest ecological indicator. In fact, scenario 5 imposed the least burden on the environment and showed the best performance. In Scenario 4, Scenario 3, Scenario 2 and Scenario 1, weaker performance was observed, respectively. According to the results, the burial option had the greatest environmental impact and should be selected as the last priority.
 

 Due to its low cost, simplicity and speed of separation and high efficiency, The magnetic separation method widely used to remove contaminants and to solve the problems of the environment. The aim of this study was synthesis of magnetic activated carbon by Fe3O4 and investigating its efficiency in adsorption of Cadmium from aqueous solutions. Magnetic adsorbent prepared by the method of sequestration and physical characteristics and structure of synthesized absorbent were determined by XRD, SEM and TEM. To remove the Cadmium and Lead from aqueous solutions, the Box-behnken design (BBD) of response surface methodology (RSM) was employed for optimizing all parameters affecting the adsorption process. The studied parameters were pH(5-9), temperature (25-45 0C) and the amount of adsorbent (0.5-2 g). 15 experimental runs were calculated by using BBD. Also UVC lamp with power 8w was used for photocatalytic process.
The optimal condition for removal Cadmium by synthesis of magnetic activated carbon by Fe3O4 nanoparticles were pH=7, 450C temperature and The 2 g of adsorbent .Syntactic analysis indicated that the adsorption of cadmium is consistent with the syntactic model for second-order adsorption and showed the optimal time was15 min. The maximum percentage of cadmium removed after 90 min was 95.12%. The adsorption isotherm was well fitted to Longmire model. The study showed that magnetic activated carbon has a high potential for Remove cadmium. Therefore, it is believed that magnetized active carbon by keeping its physical and surface properties could be a suitable method to solve some related problems includingseparation and filtration.