ABSTRACT
A population growth in Iran in last decades and consequently the development of urban, agriculture and industrial sectors cause the groundwater contamination in many areas of this country. This paper presents the results of a set of researches during four years on groundwater remediation by Zero-Valent Fe Nano particles in laboratory scale. This method is an innovative, efficient and economic method for in-situ groundwater remediation. The nitrate, arsenic and cadmium pollutants have been selected as a representative of some contaminated aquifers in this research. In the first step, the batch experimental has been applied to understand the process of nitrate, arsenic and cadmium removal at different times, concentrations and pH. Then the soil column experimental setup in homogenous and heterogeneous conditions has been used to examine the efficiency of injected Zero-valent Fe nano particles to remediate the contaminants in saturated porous media. The results show that Fe nano particle is a useful tool for reduction the rate of nitrate, arsenic and cadmium. By this research we can propose this method in a real case aquifer remediation.
