Silver recovery from waste photographic films by an enzymatic method


NAKIBOGLU N., TOSCALI D., Yasa I.

TURKISH JOURNAL OF CHEMISTRY, cilt.25, ss.349-353, 2001 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 25 Konu: 3
  • Basım Tarihi: 2001
  • Dergi Adı: TURKISH JOURNAL OF CHEMISTRY
  • Sayfa Sayıları: ss.349-353

Özet

A different enzymatic method was developed for stripping the silver from waste X-ray photographic films. The silver having purity of > 99% was recovered by smelting the obtained slurry in the presence of borax. Enzyme extract, obtained from Bacillus subtilis ATCC 6633 by modifying Horikoshi medium, was used for stripping the silver layer. The metal impurities (Al, Cd, Co, Cr, Cu, Fe, Mg, Mn, Ni, Pb and Sri) in the recovered silver were determined using the ICP-MS method. The results were compared those in with literature for high purity silver using the same method.