In this study, an industrial waste-blast furnace slag (BFS) supported sulfidized nanoscale zerovalent iron (S-nZVI@BFS) was prepared and used for synergistic reduction and adsorptive removal of Cr(VI) from aqueous solutions. The characterization analysis showed that Fe⁰ and FeS were well dispersed on the surface of BFS, and the specific surface area of S-nZVI@BFS was 141.986 m² g⁻¹. Batch experiments demonstrated that the removal capacity of Cr(VI) was as high as 184 mg/g for S-nZVI@BFS. The pseudo-second-order kinetic model fitted the Cr(VI) removal kinetics well. Cr(VI) removal on the S-nZVI@BFS relied highly on pH values. The reduced Cr(VI) precipitated on S-nZVI@BFS mainly as Cr_xFe_(1-x)(OH)₃, Cr_xFe_(1-x) OOH and Cr₂S₃, and the alkaline capacity of the BFS could efficiently prevent the release of Cr(III) from the precipitations in acid condition. Thus, supporting S-nZVI on BFS was an effective and safe method for Cr(VI) removal from aqueous solutions.

在这项研究中，制备了工业废渣-高炉渣（BFS）负载的硫化纳米级零价铁（S-nZVI @ BFS），并用于协同还原和吸附去除水溶液中的Cr（VI）。表征分析表明，Fe ⁰和FeS良好地分散在BFS的表面，S-nZVI @ BFS的比表面积为141.986 m ² g ^-1。批处理实验表明，对于S-nZVI @ BFS，Cr（VI）的去除能力高达184 mg / g。拟二级动力学模型很好地拟合了Cr（VI）去除动力学。S-nZVI @ BFS上的Cr（VI）去除高度依赖于pH值。还原Cr（VI）主要以Cr _x Fe _（1-x）（OH）_3的形式沉淀在S-nZVI @ BFS上，Cr _x Fe _（1-x） OOH和Cr ₂ S ₃以及BFS的碱性容量可以有效地防止在酸性条件下沉淀物中释放Cr（III）。因此，在BFS上负载S-nZVI是从水溶液中去除Cr（VI）的有效且安全的方法。