Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
Bioresour Technol. 2010 Apr;101(7):2562-4. doi: 10.1016/j.biortech.2009.11.074. Epub 2009 Dec 21.
The low-cost composite, nano-zerovalent iron (NZVI) contained in porous carbon (PC), was prepared using pinewood sawdust and ferric chloride as starting materials. The key point of this strategy was that the production of PC and the formation of NZVI were accomplished simultaneously through a simple process. The composite PC/NZVI was characterized by XRD, BET and the adsorption and simultaneous dechlorination of PCBs were efficiently demonstrated. The results showed the pinewood sawdust was activated by ferric chloride and the surface area and the pore volume of obtained composite were 423 m(2)/g and 0.23 cm(3)/g, respectively. The produced NZVI, around 27 nm in diameter, catalyzed the formation of substantial mesopores in the composite. PC/NZVI exhibited an efficient dechlorination of PCBs at room temperature, and the dechlorinated-products could be completely adsorbed onto the composite. Accordingly, it is believed that PC/NZVI developed in the present study is practically applicable for PCBs-contaminated water purification.
使用木屑和氯化铁作为起始材料，制备了负载在多孔碳（PC）上的廉价复合材料纳米零价铁（NZVI）。该策略的关键在于，通过简单的过程同时实现了 PC 的生产和 NZVI 的形成。通过 XRD、BET 以及 PCB 的吸附和同时脱氯对 PC/NZVI 复合材料进行了表征。结果表明，木屑被氯化铁活化，所得复合材料的比表面积和孔体积分别为 423 m(2)/g 和 0.23 cm(3)/g。所生成的 NZVI，直径约 27nm，在复合材料中催化形成了大量中孔。PC/NZVI 在室温下对 PCB 表现出高效的脱氯作用，脱氯产物可完全被吸附到复合材料上。因此，相信本研究中开发的 PC/NZVI 在实际应用中可用于 PCB 污染水的净化。
