Environmental study of heavy metal pollution of two species of plants Juncus acutus and Hammad salicornica of Shadegan wetland

This study was conducted in 2019-2020 with the aim of evaluating heavy metals in two species of plants of Shadegan wetland. The sampling site of Juncus acutus and Hammad salicornica in two different sites including site A and site B of the wetland was in two seasons of summer and winter. In the generation plant, the highest values ​​of bioaccumulation index of zinc and manganese metals in the leaves of the plant in the first station in summer were 1.60 and 0.85, respectively. The highest values ​​of this index for cobalt and molybdenum in the leaves of the second generation plant in winter were 8 and 37, respectively. Regarding copper and selenium, the highest amount of bioaccumulation index in plant leaves in winter was observed in the third and first stations of 1.11 and 6.22, respectively. The lowest bioaccumulation index of zinc, copper, cobalt, manganese, selenium and molybdenum was obtained in the roots of the generation plant. In winter, the highest and lowest metal transfer index in the generation plant was related to copper and nickel metals, respectively 22 and 0.02. In summer, the highest and lowest values ​​of molybdenum and nickel were 4.12 and 0.53, respectively. The bioaccumulation index of metals in generation and remnant plants showed that these plants have the ability to accumulate heavy metals and are part of accumulation plants, because heavy metals in the leaves and roots of these plants were measured in very small amounts. Also, according to the results obtained from the metal transfer index in the plant generation and remnant have the ability to absorb and accumulate heavy metals.