RE SULTS AND DISCUSSION Reactions with nanoscale Fe particles. Reactions of CT and CF (chloroform) with nanoscale Fe particles are shown in Figure 1. 0.103 mM (15.86 mg/L) of CT was completely reduced within 20 hours. Several intermediates and final products were observed. CF emerged very quickly and peaked (61%) around 20 hours corresponding to the disappearance of CT. Complete reduction of CF was observed around 100 hours. Both dichloromethane (DCM) (51%) and methane (41%) accumulated steadily and constituted the two major final products. Reactions with commercial grade Fe particles. Reactions of CT with the Aldrich Fe particles (<10 pm) are presented in Figure 2. Preliminary testing suggested much lower reactivity for the Aldrich iron particles. Therefore, a much higher metal to solution ratio (10g/20mL) was used for the reaction. 0.103 mM (15.9 mg/L) of CT was reduced within about 72 hours (>98%). Three major products were identified. CF peaked (53%) around 48 hours. Complete reduction of CF was observed around 100 hours. Concentration of DCM increased rapidly corresponding to the CT reduction and leveled off around 70 hours at a yield of 71%. Methane accumulated with a final yield around 25%. Small amounts of chloromethane also observed after 72 hours and gradually accumulated to about 5% of the total carbon Figure 1. Reactions of nanoscale iron particles with CT. Initial CT concentration was 0.103 mM. Metal to solution ratio was 0.25 g/20 mL

DOI link for RE SULTS AND DISCUSSION Reactions with nanoscale Fe particles. Reactions of CT and CF (chloroform) with nanoscale Fe particles are shown in Figure 1. 0.103 mM (15.86 mg/L) of CT was completely reduced within 20 hours. Several intermediates and final products were observed. CF emerged very quickly and peaked (61%) around 20 hours corresponding to the disappearance of CT. Complete reduction of CF was observed around 100 hours. Both dichloromethane (DCM) (51%) and methane (41%) accumulated steadily and constituted the two major final products. Reactions with commercial grade Fe particles. Reactions of CT with the Aldrich Fe particles (<10 pm) are presented in Figure 2. Preliminary testing suggested much lower reactivity for the Aldrich iron particles. Therefore, a much higher metal to solution ratio (10g/20mL) was used for the reaction. 0.103 mM (15.9 mg/L) of CT was reduced within about 72 hours (>98%). Three major products were identified. CF peaked (53%) around 48 hours. Complete reduction of CF was observed around 100 hours. Concentration of DCM increased rapidly corresponding to the CT reduction and leveled off around 70 hours at a yield of 71%. Methane accumulated with a final yield around 25%. Small amounts of chloromethane also observed after 72 hours and gradually accumulated to about 5% of the total carbon Figure 1. Reactions of nanoscale iron particles with CT. Initial CT concentration was 0.103 mM. Metal to solution ratio was 0.25 g/20 mL

RE SULTS AND DISCUSSION Reactions with nanoscale Fe particles. Reactions of CT and CF (chloroform) with nanoscale Fe particles are shown in Figure 1. 0.103 mM (15.86 mg/L) of CT was completely reduced within 20 hours. Several intermediates and final products were observed. CF emerged very quickly and peaked (61%) around 20 hours corresponding to the disappearance of CT. Complete reduction of CF was observed around 100 hours. Both dichloromethane (DCM) (51%) and methane (41%) accumulated steadily and constituted the two major final products. Reactions with commercial grade Fe particles. Reactions of CT with the Aldrich Fe particles (<10 pm) are presented in Figure 2. Preliminary testing suggested much lower reactivity for the Aldrich iron particles. Therefore, a much higher metal to solution ratio (10g/20mL) was used for the reaction. 0.103 mM (15.9 mg/L) of CT was reduced within about 72 hours (>98%). Three major products were identified. CF peaked (53%) around 48 hours. Complete reduction of CF was observed around 100 hours. Concentration of DCM increased rapidly corresponding to the CT reduction and leveled off around 70 hours at a yield of 71%. Methane accumulated with a final yield around 25%. Small amounts of chloromethane also observed after 72 hours and gradually accumulated to about 5% of the total carbon Figure 1. Reactions of nanoscale iron particles with CT. Initial CT concentration was 0.103 mM. Metal to solution ratio was 0.25 g/20 mL