In this study a novel iron-based reducing agent of highly effective reduction toward nitrobenzene (NB) was obtained by pretreating zero valent iron (ZVI) with H₂O₂/HCl. During the H₂O₂/HCl pretreatment, ZVI undergoes an intensive corrosion process with formation of various reducing corrosion products (e.g., Fe²⁺, ferrous oxides/hydroxides, Fe₃O₄), yielding a synergetic system (prtZVI) including liquid, suspensions and solid phase. The pretreatment process remarkably enhances the reductive performance of ZVI, where a rapid reduction of NB (200 mg L⁻¹) in the prtZVI suspension was accomplished in a broad pH range (3–9) and at low dosage. Nitrosobenzene and phenylhydroxylamine are identified as the intermediates for NB reduction with the end-product of aniline. Compared with the virgin ZVI as well as another nanosized ZVI, the prtZVI system exhibits much higher electron efficiency for NB reduction as well as higher utilization ratio of Fe⁰. A rapid reduction of various nitroaromatics in an actual pharmaceutical wastewater further demonstrated the feasibility of the prtZVI system in real wastewater treatment.

在这项研究中，通过用H ₂ O ₂ / HCl预处理零价铁（ZVI），获得了一种高效还原为硝基苯（NB）的新型铁基还原剂。在H ₂ O ₂ / HCl预处理期间，ZVI经历了强烈的腐蚀过程，形成了各种还原性腐蚀产物（例如Fe ²⁺，氧化亚铁/氢氧化物，Fe ₃ O ₄），产生了包括液体在内的协同系统（prtZVI） ，悬浮液和固相。预处理过程显着增强了ZVI的还原性能，其中NB（200 mg L ^-1）在prtZVI悬浮液中可在较宽的pH范围（3–9）和低剂量下完成。亚硝基苯和苯羟胺被确定为苯胺终产物还原NB的中间体。与原始的ZVI以及另一种纳米ZVI相比，prtZVI系统显示出更高的电子效率，可用于NB还原以及更高的Fe ⁰利用率。实际制药废水中各种硝基芳烃的快速减少进一步证明了prtZVI系统在实际废水处理中的可行性。