화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Journal of Chemical Engineering, Vol.31, No.1, 74-80, January, 2014
DOI10.1007/s11814-013-0174-9  Export Citation
Silver recovery from radiographic film processing effluents by hydrogen peroxide: Modeling and optimization using response surface methodology
Fatemeh Mahdizadeh1, 2, Mohammadreza Eskandarian3, †, Javad Zabarjadi4, Ali Ehsani5, and Amirhossein Afshar6
  • 1Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz, Iran
  • 2Aras’s Dreamers of Science & Industry Company, Iran
  • 3Department of Applied Chemistry, Faculty of Chemistry, University of Semnan, Semnan, Iran
  • 4Department of Chemical Engineering, Faculty of Chemistry, University of Tabriz, Tabriz, Iran
  • 5Department of Chemical Engineering, Faculty of Chemistry, Islamic Azad University, Ahar Branch, Ahar, Iran
  • 6Department of Physical Chemistry, Faculty of Chemistry, Iran University of Science & Technology, Tehran, Iran
E-mail:
The recovery of silver from X-ray film processing effluents by precipitation using hydrogen peroxide as the precipitating agent was studied. Response surface methodology (RSM) and central composite design (CCD) were applied to achieve optimum conditions. Linear, square and interactions effects between parameters to study of a second order polynomial equation were obtained. Optimum condition included the volume of H2O2 0.8 ml/min, pH=5.5, ethylene glycol 9 ml in the experimental condition. In these conditions silver recovery percentage was predicted as 92.8%. The experiment was conducted in triplicate under optimized conditions. Silver recovery percentage and average of precipitate were obtained as 91.5% and 423.19mg, respectively, which were close to the predicted amount achieved by the model.
Keywords:Silver Recovery;Optimization;Radiographic Film;Response Surface Methodology
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