The use of zero valent iron is increasingly becoming a mature technology for the in situ remediation of reducible metal ions and chlorinated organics from aqueous streams. Nanoparticles of zero valent metals generally have a higher activity than larger particles because they have a higher surface area, resulting in a more rapid remediation rate. Fe-Ni nanoparticles were characterized and evaluated for the remediation of aqueous trichloroethylene (TCE) using supports with various properties to obtain an improved material for the reductive dehalogenation reaction. Fe-Ni nanoparticles were prepared by borohydride reduction of aqueous iron and nickel salts in the presence of a support material. In the case of Fe fillings and supported nanoiron, which contain only about 20 atom % Fe on their surfaces, the corrosion products deposited primarily on hydrophobic surface regions that do not contain active iron sites. In the case of unsupported nanoiron, corrosion product deposition occurred directly onto the iron active sites, thereby passivating the unreacted iron.
All Science Journal Classification (ASJC) codes
- Chemical Engineering(all)