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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2011.4
- 수록면
- 297 - 302 (6page)
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초록· 키워드
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Acid drainage generated by pyrite oxidation has caused the acidification of soil and surface water, the heavy metal contamination and the corrosion of structures in abandoned mine and construction sites. The applicability of Na-acetate (Na-OAc) buffer and/or Na-silicate solution was tested for suppressing pyrite oxidation by reacting pyrite containing rock and treating solution and by analyzing solution chemistry after the reaction. A finely ground Mesozoic andesite containing 10.99% of pyrite and four types of reacting solutions were used in the applicability test: 1) H<SUB>2</SUB>O<SUB>2</SUB>, 2) H<SUB>2</SUB>O<SUB>2</SUB> and Na-silicate, 3) H<SUB>2</SUB>O<SUB>2</SUB> and 0.01M Na-OAc buffer at pH 6.0, and 4) H<SUB>2</SUB>O<SUB>2</SUB>, Na-silicate and 0.01M Na-OAc buffer at pH 6.0. The pH in the solution after the reaction with the andesite sample and the solutions was decreased with increasing the initial H<SUB>2</SUB>O<SUB>2</SUB> concentration but the concentrations of Fe and SO<SUB>4</SUB><SUP>2-</SUP> were increased 10 ?20 times. However, the pH of the solution after the reaction increased and the concentrations of Fe and SO<SUB>4</SUB><SUP>2-</SUP> decreased in the presence of Na-acetate buffer and with increasing Na-silicate concentration at the same H<SUB>2</SUB>O<SUB>2</SUB> concentration. The solution chemistry indicates that Na-OAc buffer and Na-silicate suppress the oxidation of pyrite due to the formation of Fe-hydroxide and Fe-silicate complex and their coating on the pyrite surface. The effect of Na-OAc buffer and Na-silicate on reduction of pyrite oxidation was also confirmed with the surface examination of pyrite using scanning electron microscopy (SEM). The result of this study implies that the treatment of pyrite containing material with the Na-OAc buffer and Na-silicate solution reduces the generation of acid drainage.
목차
Introduction
Materials and Methods
Results and Discussion
Conclusion
References
참고문헌 (14)
참고문헌 신청
Barriga, F.J.A.S / 1988 / Giant pyretic base-metal deposits,In The example of feitais / Chem. Geol 69:331~342
Ericson, P.M / 1985 / Control of acid mine drainage by application of bactericidal materials. In Control of acid mines information circular :9027
Fornasiero, D. / 1992 / An electrokinetic study of pyrite oxidation / Colloids and Surfaces 62:57~61
Ivano, V.I / 1962 / Effects of some factors on iron oxidation by cultures of Thiobacillus Ferrooxidants / Microbiology 31:645~652
이규호 / 2005 / 건설현장 절취사면의 산성암반배수 발생특성과 잠재적 산발생능력 평가 / 자원환경지질 38(1):91~99
Ericson, P.M / 1985 / Control of acid mine drainage by application of bactericidal materials. In Control of acid mines information circular :9027
Fornasiero, D. / 1992 / An electrokinetic study of pyrite oxidation / Colloids and Surfaces 62:57~61
Ivano, V.I / 1962 / Effects of some factors on iron oxidation by cultures of Thiobacillus Ferrooxidants / Microbiology 31:645~652
이규호 / 2005 / 건설현장 절취사면의 산성암반배수 발생특성과 잠재적 산발생능력 평가 / 자원환경지질 38(1):91~99
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UCI(KEPA) : I410-ECN-0101-2014-521-000705965