Investigation of climate pollution from chlorine gas in industrial units of Zanjan

Chlorine is one of the important impurities of the zinc industry by hydrometallurgy, which is introduced into the solution of zinc sulfate through water (low concentration) and feed into the factory and negative effects, such as corrosion of steel equipment, tubes, lead anodes, reduction in cathode zinc quality, increased power consumption, and also chlorine gas, cause environmental pollution. Chlorine suspended particles in the air are also contaminating materials that can cause lung, gastric and digestive diseases. Therefore, due to the negative effects of chlorine gas on the health of human communities and equipment of factories in the last decade, the attention of environmental experts and researchers has been focused on reducing this contamination. The factories of the Iranian zinc manufacturing industry are among the industries that can produce a lot of chlorine gas if it does not control its amount, which depends on the location and atmospheric conditions of that point. There are currently 85 industrial units in the city of Zanjan, a study of the pollution of the climate from the existing industry based on the UNEP guide. In this paper, in order to assess the environmental impacts of chlorine gas, Zanjan industrial units have used a matrix structure that consists of effective factors and environmental components of the dimensions of this matrix. The expert opinions of skilled people have been used to collect the initial data and score all the parameters. By quantifying the qualitative views, the overall impact on each environmental component was determined. According to the results, the percentage of environmental damage for components of air quality, human health and safety and groundwater was higher than other items. Therefore, environmental considerations should be considered for this issues.