Removal of Pb, Cu and Cr ions from aqueous solution using Five Plants Materials.

Heavy metals in water resources are one of the most important environmental problems of countries. The intensification of industrial activity and environmental stress greatly contributes to the significant rise of heavy metal pollution in water resources making threats on terrestrial and aquatic life. The toxicity of metal pollution is slow and interminable, as these metal ions are non bio- degradable. Up to now various methods of removing of these metals is considered, which is including using of low prices materials [1- 3]. The most appropriate solution for controlling the biogeochemistry of metal contaminants is sorption technique, to produce high quality treated effluents from polluted wastewater. In this study, the materials of five plants were used as sorbent for the removal of Pb, Cu and Cr ions from aqueous media. The five plants were collected different region in Ardabil province and after dried were cut into small pieces of size 5 mm. The materials were washed with distilled water, filtered and finally dried overnight at 60ºC. They were homogenized to mesh 100 in a mortar and bolter and subsequently used for adsorption experiments. Adsorption studies were performed by batch experiments as a function of process parameters (such as sorption time and PH), Freundlich model fitted best with the experimental equilibrium data among the all tasted adsorption isotherm models. Experimental results showed that the best PH for adsorption was 4 and time was 60 min. This study also showed that absorbent prepared from H1 and H3 species to be suitable adsorbent to remove the Pb and Cr heavy metal ions.