TY - JOUR T1 - Contamination Level of Mercury in the Street Dust of Ahvaz City and its Spatial Distribution TT - سطح آلودگی جیوه در گردوغبار خیابانی شهر اهواز و توزیع مکانی آن JF - JSTNAR JO - JSTNAR VL - 22 IS - 3 UR - http://jstnar.iut.ac.ir/article-1-3429-en.html Y1 - 2018 SP - 249 EP - 259 KW - Mercury KW - Street Dust KW - Contamination Factor KW - Enrichment Factor KW - Ecological Risk N2 - Dust particles are suspended particles created from various natural and anthropogenic sources. Dust particles contain toxic metals, such as mercury (Hg), which can have harmful effects on the human health. In this study, to investigate the contamination level of Hg in the street dust in Ahvaz, 95 dust samples were collected from the pavements in the main streets. The concentration of Hg in the collected samples was determined by the atomic absorption method (ASS). The contamination level was estimated based on indicators such as contamination factor (Cf), enrichment factor (EF), geo-accumulation index (Igeo) and ecological risk index (Er). The concentration value of mercury ranged from 0.02 to 8.75 mg/kg with an average of 2.53 mg/kg. The results of pollution indicators showed that the level of Hg contamination in the street dust of Ahvaz was a high level of contamination. In addition, the results of ecological risk assessment indicated that the ecological risk of Hg in the study area was very high. Spatial distribution pattern of Hg concentration showed that in areas with high population density, high traffic volume and industrial activities, there was a high pollution level of Hg. M3 10.29252/jstnar.22.3.249 ER -