Investigation of accumulation and pollution of heavy metals (mercury, lead, nickel and vanadium) related to oil and petrochemical industries in mud and sandy sediments in the Creek of Mahshar

Pollution of aquatic ecosystems with heavy metals is one of the global problems in developed countries. In this study, we investigated the concentrations of heavy metals nickel, lead, mercury and vanadium by sampling sediments using Vane Veen Grab at depths of 5, 10 and 15 meters from 4 stations including estuary Musa, Ahmadi, Ghazaleh and Ghanam in the port. Imam Khomeini was paid in 1396. Based on the results of this study, it was found that the average concentration of metals in different stations 38.79 to 64.17 for nickel, 2.23 to 13.18 for lead, 0.87 to 8.12 for mercury and 39.32 to 62.26 μg / g was obtained for vanadium. The results of one-way analysis of variance (ANOVA) showed that the concentration of metals in different stations was significantly different (P <0.05), the highest concentration was related to nickel and the lowest was related to mercury.. The results of ANOVA test showed that the concentration of metals was significantly different in sediment particles (P <0.05). The highest concentration of metals was observed in clay particles. There was no significant difference between metal concentrations at different depths (P> 0.05). Igeo was calculated to evaluate the level of metal pollution and based on this index, it was determined that Musa and Ahmadi estuaries are contaminated with respect to all metals, Ghazaleh estuary with respect to mercury and nickel, but Ghanam estuary is not contaminated.