摘要：

In this paper, an efficient method synthesizing nanoscale (l-100nm) iron and nickelized iron was presented. BET specific surface area of the synthesized metal particles was 52.61 m2/g. Nanoscale iron and nanoscale Ni/Fe bimetal were used to dechlorinate carbon tetrachloride (CT). Batch studies demonstrated that nanoscale particles can quickly and completely dechlorinate CT. When the reactions last 1 hour, the dechlorination rate was 98% for nanoscale Ni/Fe and 84% for nanoscale iron while 65% for cast iron particles. TCM emerged very quickly and peaked (25% for nanoscale Ni/Fe and 59% for nanoscale iron, respectively) around 1 hour corresponding to the disappearance of CT. Nanoscale particles enhanced dechlorination rate significantly,especially for nanoscale Ni/Fe bimetallic system. Complete reduction of TCM was observed around 4 hours. DCM (15%) and CH 4 (27%) accumulated steadily. Nanoscale particles were invaid for DCM. The presence of Ni as catalyst reduces activation energy and increases the rate of dechlorination reactions, more importantly, curtails production of chlorinated byproducts.

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