Evaluation of Heavy Contamination of Metals (Nickel, Cadmium and Vanadium) in Water and Hawalzim Wetland Sediments in Khuzestan Province

This research was conducted in 2018 to investigate heavy metals of cadmium, nickel and vanadium in water and sediments of Horralzim wetland in Khuzestan province. Sampling was performed according to Standard Method No. 3030 A and American Society for Testing and Materials No. D 2488 from three stations. In order to measure heavy elements, the ICP-OES model Varian 710-ES was used to measure the induction plasma (ICP) and its composition by mass spectrometry (ICP-MS). The highest amount of cadmium, nickel and vanadium in water of Horealamim wetland was 0.496, 4.25 and 0.796 mg L-1 respectively at second station and in Hooralazim Wetland sediments, respectively, 0.073, 20.64 and 80.35 mg Kg-1 at the second station. The average amount of heavy metals of cadmium, nickel and vanadium in water and sediments of Hooralazim Wetland in the second station was obtained above the first and third stations. Contamination factor of Cadmium and Vanadium in all three stations was in low pollution, but nickel metal was in the medium to high pollution level. Degrees of contamination at the 3 stations studied are heavy contaminated cadmium, nickel and vanadium. The Ecological Risk Assessment of Cadmium and Nickel Metals in Horealamim Wetland Sediments and Ecological Risk Potential were classified into class and low ecological and biological risk categories. The amount of heavy metals of cadmium and nickel in the waters of Hooralazim wetland was higher than the national and international standards. The levels of cadmium and vanadium in the Horeal wetland sediments were lower than the national and global standards, but the amount of nickel in sediments was higher than national and global standards.