[논문]휴폐광산의 중금속제어를 위한 융합공정 개발

도현승

doi:10.15207/jkcs.2016.7.1.155

휴폐광산의 중금속제어를 위한 융합공정 개발
Convergence Process for the Removal of Heavy Metals in the Abandoned Mine 원문보기

한국융합학회논문지 = Journal of the Korea Convergence Society, v.7 no.1, 2016년, pp.155 - 160

도현승 (청주대학교 이공대학 토목공학과)

초록
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청양지역 폐광산의 오염원인인 중금속의 제거를 침출과 이온교환법을 활용한 융합공정을 통해 실험하였으며 중금속에 오염된 토양시료는 통계처리를 하여 분석하였다. 오염토양은 일차로 부선처리법으로 분리하였으며, 사용시약이 증가할수록 선별지수는 증가하였다. 중금속을 제거하기 위한 침출과 이온분리법에 의해 선별도는 더 향상이 되었다. 침출속도는 황산용액이 증가할수록 증가되었으며, 침출용액은 이온교환법에 의해 상당부분 제거가 되었다. 침출과 이온교환법이 결합된 연속융합공정을 개발하여 중금속 제거 실험을 하였으며, 향후 개선을 통해 중금속의 제거효과가 향상될 것이며, 이를 통해 폐광산의 오염토양에 적용 가능함을 알 수 있었다.

Abstract ▼ AI-Helper

The convergence process utilized both leaching and ion exchange techniques has been investigated for the heavy metals removal in the abandoned mine of Chungyang Province, Korea. The contaminated soil samples by heavy metals from Samkwang mine were analysed by statistical analyses. The highly contaminated soils was initially separated by the flotation process. The selectivity indices were increased with increasing flotation reagents. The selectivity of separation was then improved by the use of both leaching and ion exchange processes in order to extract the heavy metals. The results of this study showed that the higher the sulfuric acid concentration, the leaching rate of heavy metals was increased. The lecheate then was removed by the ion exchange method. The anticipating results might imply that convergence process utilized both leaching and ion exchange techniques would somehow apply for the removal of heavy metals in the abandoned mine.

주제어

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문제 정의

The purpose of this study is to develop the optimum convergence process to effectively remove the heavy metals that causes the greatest risk to human health. The flotation separation, leaching and ion exchange tests were conducted with soil samples in order to give information to find variables and promote remediation of contaminated soil.

제안 방법

The flotation treatment was conducted with soil samples in the range of -420µm to +43µm. The floated samples were used for leaching and ion exchange tests. The batch flotation tests are conducted with a 20 g (dry basis) sample in a homemade laboratory flotation cell to 25% solids.
As the heavy metals within the soil of the mine exist mostly within 4,000 meters, the samples were collected in the Northern, Southern, Eastern, and Western directions within 50 meter intervals. The soil samples were screened out by wet analysis technique and dried for measuring heavy metal contents by ICP(Flame Module S). Baker analytical reagent grade sulfuric acid was used.
In order to reduce the risk of contamination with heavy metals from mine wastes, the processes must be treated effectively. The statistical methods was performed to evaluate pH and the contamination levels of the following elements within the polluted soil surroundings: As including other seven heavy metals, Cd, Cu, Hg, Pb, Ni, Cr6+, and Zn. [Table 2] represents the summary of statistics for element’s mean concentrations of heavy metals in soil.

대상 데이터

The soil samples were collected in the Samkwang mine which have a longitude of 360° 31‘ 04” and a latitude of 126° 52‘ 50”. As the heavy metals within the soil of the mine exist mostly within 4,000 meters, the samples were collected in the Northern, Southern, Eastern, and Western directions within 50 meter intervals. The soil samples were screened out by wet analysis technique and dried for measuring heavy metal contents by ICP(Flame Module S).
The leaching experiments were made with a 3-liter scale leaching cell. The percent leaching efficiency was expressed as the percentage of the content quantity of the initial sample from the leacheate.

데이터처리

The collector emulsion was prepared by various concentrations of SDS (sodium dodecyl sulfate). The correlation analysis was performed between the heavy metals in the soil.

성능/효과

2. On the flotation results, the use of SDS improved the selectivity of separation. The separation ratios was almost 2 at the amount of 0.
[Table 2] represents the summary of statistics for element’s mean concentrations of heavy metals in soil. The mean dispersion, standard deviation (SD), and the coefficient of variation(CV) were calculated[6], and it was found that out of the heavy metals, Zn was the most detected element. The coefficients of variation can be ranked as follows Pb > Ni > Cu > Cd > As.

참고문헌 (12)

CM. Bassidy,, H. A. E. Mulleneers, H. Lee and J. T. Trevors, "Mineralization of Pentachlorophenol in a Contaminated Soil By Pseudomonas Sp Ug 30 Cells Encapsulated", J. of Ind. Micro. and Bioethics, Vol. 19, No. 1, pp. 43-48, 1997.
V. P. (Bill) Evangelou and Y. L. Zhang,"A review: Pyrite Oxidation Mechanisms and Acid mine Drainage Prevention", Critical Reviews in Environmental Science and Technology, Vol. 25, Issue 2, pp. 141-199, 1995.

상세보기
M. Vanthuyne, and A. Maes, "The Removal of Heavy Metals from a Contaminated Soil by a Contaminated by a Combination of Sulfidization and Flotation", The Science of Total Environment, Vol. 290, pp. 69-80, 2002.

상세보기
H. Dho and I. Iwasaki, "Role of Sodium Silicate in Phosphate Flotation, SME/AIME Annual Meeting, Salt Lake city, Utah, Feb 26, Preprint No. 90-130, 1990.
M.E. Park, J. Y. Sung, M. Lee, and M.C. Kim, "Effects of pH-EH on Natural Attenuation of Soil Contaminated by Arsenic in the Dalcheon Mine Area", Ulsan, Korea, Econ. Environ. Geol. Vol. 38, pp. 513-523, 2005.
R.A. Johnson, and D.W Wichern, "Applied Multivariate Analysis", 5th ed. Prentice-Hall, 2002.
H. Dho, S.D. Kim, and S.J. Lee, "Risk Assessment for Heavy metal pollutants of Abandoned Mines using Statistical Techniques", Journal of Korea Safety Management and Science, Vol. 11, No. 3, pp. 41-48, 2009.
M. Ejtemaeia, M. Irannajada, and M. Gharabaghi, "Influence of Important factors on Flotation of Zinc oxide mineral using Cationic, Anionic and Mixed (cationic/anionic) Collectors", Minerals Eng., Vol. 24, Issue 1-3, pp. 1402-1408, 2013.
K.A. Matis, I.N. Papadoyannis, and A.I. Zoumboulis, "Separation of Germanium and Arsenic from Solutions by Flotation", Inter. J. of Min. Proc., Vol. 21, Issues 1-2, pp. 83-92, 1987.

상세보기
A. Sahuquillo, A. Rigol, and G. Rauret, "Overview of the use of Leaching/extraction tests for Risk Assessment of Trace Metals in Contaminated soils and Sediments", TrAC Trends in Analytical Chemistry, Vol. 22, Issue 3, pp. 152-159, 2003.

상세보기
K. Fernando, T. Tran, and G. Zwolak, "The Use of Ion exchange resins for the Treatment of Cyanidation Tailings. Part 2, Pilot plant Testing, Minerals, Eng., Vol. 18, pp 109-117, 2005.

상세보기
E. Neyens and J. Baeyens, "A Review of Thermal Sludge Pre-treatment Processes to Improve Dewaterability", Journal of Hazardous Materials, Vol. 98, Issues 1-3, pp. 51-67, 2003.

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휴폐광산의 중금속제어를 위한 융합공정 개발
Convergence Process for the Removal of Heavy Metals in the Abandoned Mine 원문보기

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휴폐광산의 중금속제어를 위한 융합공정 개발 Convergence Process for the Removal of Heavy Metals in the Abandoned Mine 원문보기

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휴폐광산의 중금속제어를 위한 융합공정 개발
Convergence Process for the Removal of Heavy Metals in the Abandoned Mine 원문보기

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