摘要
Through continuous flow experimentation, the reactivity characteristics of zero-valent iron （Fe0）-PRB with ground watercontaminated by nitrate, chromium and the combination of nitrate and chromium were investigated. The results showed thatnitrate could be effectively deoxidized by zero-valent iron. NO^2- -N was the transitional deoxidization product, while NH4＋-Nwas the main final product in the effluent. Chromium could be deoxidized by zero-valent iron more effectively for the chromiumcontaminated ground water which was treated by PRB. The redox products such as Fe3＋ and Cr（III） precipitated on the packingmedia during the process. For the treatment of ground water contaminated by both nitrate and chromium, the results showed thatthe Cr（VI） removal efficiency by the zero-valent iron was not affected by the co-existence of NO^3- -N, while the NO^3- -N removalefficiency decreased with the existence of Cr（VI）.
