State Key Laboratory of Pollution Control and Resources Reuse, Tongji University, Shanghai, China.
J Hazard Mater. 2012 May 30;217-218:416-21. doi: 10.1016/j.jhazmat.2012.03.047. Epub 2012 Mar 27.
Experiments were conducted to examine of nitrobenzene reduction by steel convert slag (SCS) with Fe(II) system. The results showed SCS with Fe(II) was an effective reductant for nitrobenzene at pH 5.5-6.5. Further analysis suggested Fe(II) was adsorbed by SCS through ion replacement with SCS-bound Ca(II). More than 81% of the total Ca(II) in SCS was replaced with dissolved Fe(II), indicating a high adsorption capacity for Fe(II) (more than 5.82 mmol Fe(II)/g SCS). A three step mechanism (replacement process, conversion process and electron transfer process) was proposed for nitrobenzene reduction by SCS with Fe(II) system. The amount of Ca(II) in SCS determined the adsorption capacity for Fe(II) and further determined the reduction capacity of SCS with Fe(II) system.
进行了实验以研究钢渣（SCS）与 Fe(II)体系还原硝基苯的情况。结果表明，在 pH 值为 5.5-6.5 时，SCS 与 Fe(II)是一种有效的硝基苯还原剂。进一步的分析表明，Fe(II)通过与 SCS 结合的 Ca(II)的离子取代而被 SCS 吸附。SCS 中超过 81%的总 Ca(II)被溶解的 Fe(II)取代，表明其对 Fe(II)具有很高的吸附能力（超过 5.82mmol Fe(II)/g SCS）。提出了 SCS 与 Fe(II)体系还原硝基苯的三步机制（取代过程、转化过程和电子转移过程）。SCS 中 Ca(II)的含量决定了其对 Fe(II)的吸附能力，进而决定了 SCS 与 Fe(II)体系的还原能力。
