C - Chemistry – Metallurgy – 02 – F
Patent
C - Chemistry, Metallurgy
02
F
C02F 1/58 (2006.01) B09C 1/00 (2006.01) B09C 1/02 (2006.01) B09C 1/08 (2006.01) C02F 1/70 (2006.01)
Patent
CA 2235208
Groundwater, or other water contaminated with chlorinated organic contaminants, is passed through a permeable body of iron particles. The particles are coated with nickel, but the coating is incomplete, in that, in patches, the iron is directly exposed. The contaminants break down under prolonged proximity to the iron, the nickel enhancing the catalytic effect. The rate of breakdown is much faster than when bare iron particles were used. When the nickel is alloyed with phosphorus, or boron, even more rapid breakdown rates are achieved.
On fait passer de l'eau souterraine ou toute autre eau contaminée par des polluants organochlorés à travers un corps perméable fait de particules de fer. Ces particules sont enrobées de nickel, l'enrobage restant, toutefois, incomplet du fait que, par endroits, le fer est directement exposé. Ces polluants se dégradent après être longtemps restés à proximité du fer, le nickel renforçant l'effet catalytique. La vitesse de dégradation est alors bien plus élevée que lorsque l'on utilise des particules de fer nu. Lorsque l'on allie du phosphore ou du bore au nickel, on obtient des vitesses de dégradation encore plus élevées.
Gillham Robert Winston
O'hannesin Stephanie Frances
Odziemkowski Marek Szczepan
Asquith Anthony
University Of Waterloo
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