Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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Basic Studies on the Treatment and Recovery of Silver Contained in Waste Photographic Fixing Solution Using D2EHPA as an Extractant

D2EHPA를 추출제로 한 사진폐액 함유 은의 처리 및 회수에 대한 기초연구

  • Chung, Won-Ju (Department of Environmental Science and Engineering, Ewha Womans University) ;
  • Kim, Dong-Su (Department of Environmental Science and Engineering, Ewha Womans University) ;
  • Lee, Hwa-Young (Eco-Nano Research Center, KIST)
  • 정원주 (이화여자대학교 환경학과) ;
  • 김동수 (이화여자대학교 환경학과) ;
  • 이화영 (한국과학기술연구원 나노센터)
  • Received : 2005.10.18
  • Accepted : 2005.11.25
  • Published : 2006.03.30
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Abstract

Basic investigations have been carried out for the solvent extraction of silver contained in the waste photographic fixing solution using D2EHPA as an extractant. Extraction experiments were conducted using artificial waste solution which was made by dissolving $AgNO_3$ in distilled water along with actual waste fixing solution. For artificial waste solution, the extraction of silver was found to occur very rapidly at the initial stage of extraction. In addition, more silver was extracted as the volumetric ratio between aqueous phase and organic phase was decreased. The volumetric ratio of organic extractant to diluent was also taken as an influential variable and the extracted amount of silver was observed to decrease with temperature. The characteristics of silver extraction for actual fixing solution was generally similar to that for artificial waste solution. Regarding the kinetic analysis, the extraction of silver contained in the actual solution was observed to follow a first order reaction.

Keywords

References

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