Enrichment Factor (EF) of soil samples was also calculated to assess the impacts of anthropogenic or natural activities in soil. EF value less than 2 indicates low enrichment and less influence of anthropogenic activities. EF value between 2 and 5 shows a moderate enrichment while EF value greater than 5 is significantly enriched [27]. EF was calculated as the double ratio of the concentration of a measured element to the reference element in soil and the earth crust [28]. Calculation of EF is expressed in Eq.