Investigating the Role and Influence of Airborne Pollutant (NO2) Dispersion on Heavy Metals in Soil (Case Study of Syraf Gas Condensate Refinery)

Today, air pollution in oilfield and refinery areas and around it is one of the major challenges that unfortunately creates important problems for the residents of the region.In the present study, to determine the relationship and correlation between NO2 emissions from the flare of Syraf gas condensate refinery and heavy metals in the soil. The emission rate of this pollutant was calculated using the proposed emission factors by the US Environmental Protection Agency 1.0417g/s and the air modeling was done using AERMOD software. The most dispersion of NO2 is based on the wind direction from the west to the east. Sampling results from soil at 6 points around the site were compared with the standards of the Environmental Protection Agency for soil and it was found the lead metal content was higher than the standard. one-way ANOVA and Duncan's multiple domain test used in Spss software, the highest lead dispersion due to the distribution of more pollutant sources such as 19, 12, 14 phases, as well as the LNG site and the Aram Cement Factory located in the western part of the site, is related to this area of the site. The correlation between heavy metals and NO2 pollutants showed that there was a positive and significant correlation between this pollutant and lead metal in soil surface, Because of the Nitrite and Nitrate anionic compounds in the soil, these compounds form salt with the adsorption of lead metal.