Removal of Trichloroethylene from Water by Bimetallic Ni/Fe Nanoparticles

Chlorinated organic solvents (COSs) are a significant threat to human beings. In this study, nanoscale bimetallic Ni/Fe particles were synthesized from the reaction of sodium borohydride (NaBH4) with reduction Ni2+ and Fe2+ in an aqueous solution. The zero-valent iron (nZVI) Ni-nZVI characterized by SEM (scanning electron microscopy), XRD (X-ray diffractometer), Brunauer–Emmett–Teller (BET), transmission microscopy (TEM). removal performance trichloroethylene (TCE) over nZVI catalyst was evaluated. different Ni contents exhibited good reactivity towards dechlorination TCE 1h period, pseudo-first-order rate constant for 1.4–3.5 times higher than that nZVI. 5 wt% best effect; rates its by-product dichloroethylene (DCE) 100% 63.69%, respectively. These results indicated nanoparticles as second dopant metal better degradation. This determination optimal Ni-NZVI load ratio provides factual theoretical basis subsequent application nano-metal binding environment.