List of subject articles


    • Open Access Article

      1 - Quantity and quality investigation of generated wastes at steel industries
      زهرا ضمیرایی علی ناهد
      Regarding to the variety of uses of steel in the world and widening its scope of application with the advancement of technology, steel production has changed to keep pace with advances in technology, following the changes; producers have tried to raise productivity and Full Text
      Regarding to the variety of uses of steel in the world and widening its scope of application with the advancement of technology, steel production has changed to keep pace with advances in technology, following the changes; producers have tried to raise productivity and use of cheaper energy and fuels due to its geographical environment. There are the wastes in different stages of steelmaking (coke making, iron making and steelmaking). The generated wastes in this industry are with hazardous substances such as heavy metals, according to the classifications of the wastes, are classified as hazardous wastes. Therefore, identification and analysis and management of such waste in these industries are essential. The release of aforesaid hazardous wastes in nature can be had issues and problems for the environment and human health ultimately exceed the acceptable environmental conditions. The proper management of hazardous wastes in order to reduce and control pollution of the environment is utmost importance. Manuscript Document
    • Open Access Article

      2 - Study of the Amount and Composition of Construction and Demolition Wastes in the Karaj City
      Saeideh Bigdeloo Seyed Hassan Mousavi Mazaher Moeinaddini ghasemali omrani
      In Karaj, the large volume of wastes was produced due to the high level of construction activities such as demolition of old buildings and the construction of new buildings. In this regard, it is necessary to have management system with environmental protection perspect Full Text
      In Karaj, the large volume of wastes was produced due to the high level of construction activities such as demolition of old buildings and the construction of new buildings. In this regard, it is necessary to have management system with environmental protection perspective for the construction and demolition wastes (CDW). Therefore, the main purpose of this research was study of the amount and composition of CDW in Karaj municipality zones (10 zones) in 2017 with the financial support of Karaj municipality. In the first step, a little amount of CDW was investigated by Karaj waste management organization's statistics. The results showed that the Karaj construction sector produces 5973 tons (2186410 tons/year) of CDW every day, which is around 3% of the total amount of the country generated CDW. Also, the share of per capita CDW production is 1220 kg/year for each person per year and the maximum CDW generation rate was in the November and December and the minimum one was in March and April. In the second step, the composition of CDW was determined using field observations of the disposal sites and landfills. The average composition of CDW showed that up to 80% of the wastes are composed of the soil operation (soil, sand, stone and …) asphalt and concrete parts, building materials (such as brick, block, plaster, pottery, mosaic, etc.) Manuscript Document