A Study on the Pb-contaminated Soil Remediation by Organic Acid Washing

유기산을 이용한 납 오염토양의 복원에 관한 연구

  • 정의덕 (기초과학지원연구소 부산분소)
  • Published : 2000.10.01

Abstract

A study on the removal of Pb ion from Pb-contaminated soil was carried out using ex-site extraction process. Tartaric acid (TA) and iminodiacetic acid sodium salt(IDA) as a washing agent were evaluated as a function of concentration reaction time mixing ratio of washing agent and recycling of washing agent. TA showed a better extraction performance than IDA. The optimum washing condition of TA and IDA were in the ratio of 1:15 and 1:20 between soil and acid solution during 1 hr reaction. The total concentrations of Pb ion by TA and IDA at three repeated extraction were 368.8 ppm and 267.5 ppm respectively. The recovery of Pb ion from washing solution was achieved by adding calcium hydroxide and sodium sulfide form the precipitation of lead hydroxide and lead sulfide and optimum amounts of sodium sulfide and calcium hydroxide were 7 g/$\ell$ for the TA washing solution and 4 g/$\ell$, 5g/$\ell$ for the IDA washing solution respectively. The efficiency of recycle for TA and IDA washing solution were 78.8% , 95.1%, and 89.2%, 96.6% at third extractions under $Na_2S$ and $Ca(OH)_2$, respectively.

References

  1. 대한환경공학회 '98 추계학술대회논문초록집 Citric acid를 이용한 오염토양내 중금속의 제거에 관한 연구 서승원;이용호;강순기;공성호
  2. 환경부,제 1단계 2차년도 연차보고서 오염토양/지하수 정화기술 개발 환경부
  3. J. Envir. Engrg no.March Laboratory studies on remediation of chromium contaminated soils Pagilla,K.R.;L.W.Canter
  4. J. Envir. Engrg no.July Ex-situ remediation of a metal-contaminated superfund soil using selective extractants Steele,M.C.;J.Pichtel
  5. J. Haz. Mat. v.40 Soil washing technology and practice Griffiths,R.A.
  6. Environ. Sci. Technol. v.29 Source attribution of elevated residential soil lead near a battery recycling site Small,M.;A.B.Nunn;B.Forslund;D.Dally
  7. 한국환경과학회지 v.9 유기산 추출에 의한 철 폐광산 오염토양의 복원 정의덕;강신원;백우현
  8. 토양측정망운영지침 환경처
  9. 대한환경공학회 '98 추계학술대회논문초록집 Citric acid 세척법에 의한 중금속 오염 토양의 정화 이동호;최형섭;김균;김영희;허종수;이근선;전상수
  10. 대한환경공학회 '98 추계학술대회논문초록집 In-situ flushing을 위한 오염토양내 중금속의 제거에 관한 연구 이용호;강순기;공성호
  11. Biotechnol. Bioeng. v.53 Copper binding and release by immobilized transferrin: a new approach to heavy metal removal and recovery Spears,D.R.;J.B.Vincent