Effective Chrome Removal Process from Shaving Dust

피혁분의 효율적인 탈 크롬 방법에 관한 연구

  • Yun, Sun-Gyu (Department of Chemical Engineering, Taejon National University of Technology) ;
  • Park, Sung-Ha (Department of Chemical Engineering, Taejon National University of Technology) ;
  • Lee, Sang-Seob (Department of Industrial Chemistry Engineering, Dankook University) ;
  • Na, Jung-Won (Korea Atomic Energy Research Institute) ;
  • Ko, Myung-Han (Bong Lim Techno R&D Center)
  • 윤선규 (대전산업대학교 화학공학과) ;
  • 박성하 (대전산업대학교 화학공학과) ;
  • 이상섭 (단국대학교 공업화학과) ;
  • 나정원 (한국원자력연구소) ;
  • 고명한 (봉림테크노연구소)
  • Received : 1998.12.23
  • Accepted : 1999.11.04
  • Published : 1999.12.10

Abstract

In this study it was focused that if the chrome could be removed in the shaving dust, the reusable protein resource could be recycled from the shaving dust. As the chrome forms a Cr-collagenate by cross linking of collagen in the shaving dust, the dust was steeped for swelling and plumping by $Ca(OH)_2$ solution and then chromium in dust was resolved out by $H_2SO_4$ solution in the first stage process. In the second stage one, dust was swelled and plumped by NaOH solution and then the chromium in dust was oxygenated to a hexavalent chrome, which has high solubility in $H_2O_2$ solution. And then the chromium was removed byt he steeping of $H_2SO_4$ solution as the last process. The first stage process was consisted of the sequential steeping of 3%-$Ca(OH)_2$ and $0.8%-H_2SO_4$. In the second stage the total chrome was effectively removed by the sequential steeping of 0.1%-NaOH, $3%-H_2O_2$ and $1%-H_2SO_4$. In the completely dechromated dust, the humidity was measured as 10.68% and the crude protein was contained by 79.81%. Steeping solutions were reused 3 times for chrome removal process, the chrome was entirely removed in shaving dust.

Keywords

shaving dust;chrome removal;steeping

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