Impact Factors on Removal of Perchloroethylene with Nano-Ni/Fe Methodology

Abstract Chlorinated hydrocarbons are widely detected in groundwater, but conventional removal methodologies are not time‐and‐cost effective. With the development of iron reducing technology in recent years, research on nano‐iron and nano‐bimetal has become a hot spot. The paper presents the results of impact factors on perchloroethylene (PCE) removal by nano‐Ni/Fe method. The data show that the reaction rate of unexposed nano‐Ni/Fe is 4 times higher than exposed one; and temperature is one of the important controlling factors. Reaction rate constant K_SA increases by 2–3 times with every 10°C increment of temperature. Within a specific range, higher Ni/Fe ratio favors dechlorination process. When the Ni/Fe is 8%, the dechlorination process reaches the highest rate. Dissoved oxygen in the solution does not favor the degradation of chlorinated hydrocarbons.