Possible of arsenic removal from environment using aquatic plants in north of Khuzestan

Ability of aquatic plants as a tool for environmentally friendly municipal, industrial and agricultural wastewater treatment has been attracted to attention in the world. In this study the possibility of absorption of arsenic and heavy metal contaminated industrial wastewater treatment to this metal has been studied by four species of aquatic plant Phragmites australis, Typha latifolia, Scirpus bulrush and Alisma plantago. Therefore, through the first pot experiment and infect cultured at three different levels of arsenic in three replicates in 60-day period, in the form of a completely randomized design. Results showed that Phragmites sp. and Scirpus sp. were high accumulation of arsenic, with 119.55 and 65.25 mg/kg of dry matter at the end of plant growth period, respectively in underground organs. Accumulation in the underground organs showed significant difference with accumulation in the shoot. The two species chosen at this stage were planted in constructed ponds with dimensions 5 m long, 0.5 m wide and 0.4 m height with the isolation bed and their drainage tubes placing. A pond was conducted as a control (no plant) and intended to test the effect of system type and retention time (retention time of five 1, 3, 7, 10 and 14 days) on arsenic removal efficiency at the level of 100 mg/kg soil pollution in three replications. The results of this section showed that the effect of system type and retention time on the removal efficiency of constructed was significant but not for interaction effect of two factors.