The Anzali international wetland is a valuable habitat to a wide variety of aquatic flora and fauna. This wetland ecosystem is being threatened due to various pollutants particularly the heavy metals discharging from different point and non-point sources. Concentration of various heavy metals (Cr, Pb, Hg, Cu, Zn, Cd, Ag and Ti) was examined in the water body and Azolla filiculoides (an exotic fern in the Anzali wetland). The samples regarding water and A. filiculoides were randomly carried out in three parts of the wetland (eastern, central and western parts) in May 2015. After preparing and digesting the samples, the concentration of the heavy metals was measured using ICP OES method. The obtained results showed that the concentration of Zn in water and A. filiculoides samples was higher than other heavy meals in all parts of the wetland (p < 0.05). Overall, concentration of the heavy metals was significantly higher in the eastern part of the wetland than other two sampling locations (p < 0.05). Also with comparing the concentration of the heavy metals in water and A. filiculoides, it was found that all examined metals (except Cd and Ag) in A. filiculoides had significantly higher concentration than water sample, while Cd and Ag in water and A. filiculoides did not have a significant difference with each other. Based on the results, it can be concluded that A. filiculoides can effectively absorb Cr, Pb, Zn, Hg, Cu, Cd, Ag and Ti so that it might be used as a valuable species for the bioremediation and the removal of heavy metals from the wetland.

安扎利国际湿地是各种水生动植物的宝贵栖息地。由于各种污染物，特别是从不同点和不同点排放的重金属，该湿地生态系统正受到威胁。在水体和Azolla filiculoides（安扎利湿地中的一种异国蕨类植物）中检测了各种重金属（Cr，Pb，Hg，Cu，Zn，Cd，Ag和Ti）的浓度。2015年5月，在湿地的三个部分（东部，中部和西部）中随机抽取了有关水和丝线虫的样品。在制备和消化样品后，使用ICP OES方法测量重金属的浓度。获得的结果表明，水中锌和拟南芥中锌的浓度在湿地的所有地区，样品均高于其他重餐（p  <0.05）。总体而言，湿地东部的重金属浓度明显高于其他两个采样点（p  <0.05）。也与比较在水和重金属的浓度A. filiculoides，人们发现，所有检测的金属（除镉和银）在A. filiculoides具有比水样显著浓度较高，而镉和银在水中和A.丝虫类彼此之间无显着差异。根据结果​​，可以推断出A. filiculoides 可以有效地吸收Cr，Pb，Zn，Hg，Cu，Cd，Ag和Ti，因此可以用作生物修复和从湿地去除重金属的有价值的物种。