Resources Recycling (자원리싸이클링)

The Korean Institute of Resources Recycling (한국자원리싸이클링학회)
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Recovery of Nitric Acid from Waste Solder Stripper by Diffusion Dialysis

폐솔더 박리액으로부터 확산투석법에 의한 질산의 회수

  • Ryu, Seong-Hyung (Dept. of Advanced Materials Science & Engineering, Daejin University) ;
  • Kim, Tae-Young (Dept. of Advanced Materials Science & Engineering, Daejin University) ;
  • Ahn, Nak-Kyoon (Dept. of Advanced Materials Science & Engineering, Daejin University) ;
  • Gang, Myeong-Sik (Dept. of Advanced Materials Science & Engineering, Daejin University) ;
  • Ahn, Jae-Woo (Dept. of Advanced Materials Science & Engineering, Daejin University) ;
  • Ahn, Jong-Gwan (Dept. of Resource Recycling & Environmental Engineering, Jungwon University)
  • 류승형 (대진대학교 신소재공학과) ;
  • 김태영 (대진대학교 신소재공학과) ;
  • 안낙균 (대진대학교 신소재공학과) ;
  • 강명식 (대진대학교 신소재공학과) ;
  • 안재우 (대진대학교 신소재공학과) ;
  • 안종관 (중원대학교 자원순환환경공학과)
  • Received : 2015.08.17
  • Accepted : 2015.09.11
  • Published : 2015.10.30
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Abstract

A basic study was conducted to effectively recover nitric acid from a waste solder stripper by diffusion dialysis using anion exchange membranes. The effects of flow rate, flux ratio, nitrate concentration, and metallic ion types and concentration on the recovery percentage of nitric acid were investigated. The recovery percentage of nitric acid was decreased with the increase of flow velocity. But the recovery percentage of nitric acid was increased as the increase of flux ratio(W/F) and showing a recovery percentage of nitric acid of about 99% at a flux ratio of 1.5 or more. As the increase of nitric acid concentration in feed solution, the recovery percentage of nitric acid was increased up to 3.0M, but in case of greater than 3.0M, the recovery percentage gradually was decreased. Leakage percentage of metallic ions through the membrane were in the order of Pb, Na and Cu but Fe and Sn did not leakaged. As a result of diffusion dialysis using real waste solder stripper at a flow rate of $0.9L/hr-m^2$, W/F = 1.3, a recovery percentage of nitric acid of approximately 94% was gained.

음이온 교환막을 이용한 확산투석에 의해 폐솔더 박리액으로부터 질산을 효율적으로 회수하기 위한 기초 연구를 실시하였다. 우선 모의용액 실험의 경우 유속, 유속비, 질산농도, 금속이온 종류 및 농도 등이 질산 회수율에 미치는 영향을 조사하였다. 유속이 증가함에 따라 질산 회수율은 감소하였고 급액에 대한 순수의 유속비(W/F)가 증가할수록 질산 회수율은 증가하여 유속비가 1.5이상에서 약 99%의 질산 회수율을 보였다. 급액중 질산용액의 농도가 증가함에 따라 3.0 M 까지는 산회수율이 증가 하였으나 3.0 M 이후로는 회수율은 점차 낮아 졌다. 확산투석막을 통과하는 금속이온의 투과율은 Pb, Na, Cu순 이었고, Fe과 Sn은 투과되지 않았다. 실제 폐솔더액을 사용하여 유속 $0.9L/hr-m^2$, W/F = 1.3 으로 확산 투석을 실시한 결과 약 94%의 질산 회수율을 얻을 수 있었다.

Keywords

References

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