Dechlorination of 3,3 ',4,4 '-tetrachlorobiphenyl in aqueous solution by hybrid Fe-0/Fe3O4 nanoparticle system

作者：Wang, Yin; Si, Xiongyuan; Si, Youbin^*

来源：Journal of Experimental Nanoscience, 2015, 10(15): 1166-1179.

DOI：10.1080/17458080.2014.986228

• nanoscale Fe-0
• nanoscale Fe3O4
• 3,3 ',4,4 '-tetrachlorobiphenyl
• degradation dynamics
• hybrid system

The kinetics and efficiency of 3,3,4,4-tetrachlorobiphenyl (PCB77) degradation in aqueous solution by hybrid Fe-0/Fe3O4 nanoparticle system were investigated. The results showed that nano-sized Fe-0 and Fe3O4 could efficiently degrade PCB77, and the residual rate of PCB77 by nano-sized Fe-0 and Fe3O4 were 67.70% +/- 0.42% and 82.26% +/- 2.96%, respectively after 240 min of reaction (for 5 mgL(-1) PCB77 and 5 gL(-1) nanoparticles). The combined use of nanoscale Fe-0 and Fe3O4 could enhance the degradation of PCB77. The dose ratios of nano-sized Fe-0 and Fe3O4 significantly affected the PCB77 degradation rate. At Fe-0/Fe3O4 ratios of 1:0.1, 1:0.2 and 1:1, the residual rates of PCB77 were 6.46%, 10.23% and 38.20%, respectively. The PCB77 degradation efficiency was also greatly affected by solution pH, and was maximised at pH 6.8. The degradation of PCB77 by Fe-0/Fe3O4 nanoparticle was a dechlorination process, and the chlorion concentration increased with the decreasing residual rate of PCB77 accordingly. Fe3O4 provided Fe2+ and Fe3+ for enhancing the PCB77 degradation by nanoscale Fe-0, suggesting a synergy between Fe-0 and Fe3O4.

• 出版日期2015-10-13
• 单位安徽农业大学