Assessment of Heavy Metals (Ni, Cr, Cd) Removal by Avicennia Marina Plant Asalouyeh Zone

The goal of the present study is to investigate on elimination removal of heavy metals (Ni.Cd.Cr) while using Avicenna Marina plant. These plants are sampled from different parts of Hara jungles in Asalouyeh, after they have placed in pilot for a month in 2.5, 5.0, 10.0 and 15.0 ppm densities and pH=7.8 are studied separately and on a compound type from the items and consequently, the results are found by Spectrophotometer systems and the amount of remaining density is obtained in the Timar lotion. Considering experimental results in the filtration of any separate element with increase in Chrome and cadmium ion, increase in absorbance by the plant and in nickel with increase in density, we have been witness to the decrease in absorbance and in the mixture state of the elements in culture medium with increase in density of the elements, increase in absorbance of the chrome and nickel ion is observed, but with decrease of the total absorbance amount in comparison with separate state they were parallel. In nickel ion with increase of density, decrease in density process has been observed which has been accompanied with increase in total amount. In continuation of the researches, contact time effects has shown than the most absorbance amount during 5 days are carry out by the plants. To study pH effect, plants absorbance potential are studied in pH=2,4,6,8,10 and in ppm 15 density of Chrome ion during 7 days. Finally, according to the experimental results made, the most absorbance amount by the plant were respectively chrome ion > nickel> Cadmium in pH=8 during 5 days.