Artificial Wetland Performance in Removal of Cadmium and Lead from Oil Effluent with Vetiver Plant

Since in region of Khuzestan, different industrial wastewater, which mainly contain heavy metals, this research was carried out to investigate the efficiency of the artificial forging system under the cultivar of Vetiver, with vertical flow In the removal of lead and cadmium from industrial wastewater. In this study, culture mediums with a diameter of 60 and a height of 100 cm were used. The input concentration of cadmium and lead of waste water in the system was 20 and 50 mg/L, respectively. In this study evaluated, the effects of two depths of 45 and 70 cm, as well as remaining time of 5, 10 and 15 days and also removing efficiency, Bioconcentration factor and Translocation factor were examined in three replication and Duncan test. The results showed that concentrations of lead and cadmium metals were high in underground tissues of plant rather than aboveground tissues via accumulation in plant tissues, which could be due to the low mobility of these elements from root to aboveground tissues such as shoot and leaf. Also, the cadmium transfer index was more than lead, which indicates the high ability of the transfer of this metal in the plant.