Coagulation of Suspended Solids and Neutralization Capacity of Sludge in a Settling Pond of O Limestone Mine

doi:10.12972/ksmer.2013.50.2.204

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2013 Vol.50, Issue 2 Preview Page Next Page

Research Paper

Coagulation of Suspended Solids and Neutralization Capacity of Sludge in a Settling Pond of O Limestone Mine O 석회석 광산 세척수의 미세 석분 응집 및 석분 슬러지의 중화 특성 평가: 강중석 · 정소걸 · 정영욱 · 서의영 · 임길재 · 지상우
Jung-Seock Kang, So-Keul Chung, Young-Wook Cheong, Eui-Young Seo, Gil-Jae Yim and Sang-Woo Ji

30 April 2013. pp. 204-211

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Abstract

The physical properties and coagulation of suspended solids in a settling pond designed to control flying rock dust during screening of limestone ores in O limestone mine were evaluated. The neutralization capacity of settled sludge was also studied. Turbidity at the inlet and outlet of the settling pond was measured as 2,264 and 1,228 NTU, respectively. The later was still considered to be a high level of turbidity just before recycling. The particle size (d_(0.5)) of suspended solids in the settling pond ranged 5.1 to 10.1 μm. Jar tests showed improved coagulation of suspended solids at a pH 3 to 5 as concentration of coagulant, increased from 1 to 10 mg/L and as period of mixing increased. Neutralization evaluation results revealed that fine sludge <1 mm in size from the settling pond increased the pH of acid mine drainage to pH 6 and could remove dissolved Al and Fe within 10 minutes.

Keywords

Limestone mine

rock dust sludge

Coagulation and precipitation

Neutralization

O 석회석 광산에서 석분의 비산방지를 위해 운영하고 있는 세척수 및 침전조의 미세 부유물질의 물성과 응집침전 특성 그리고 침전조 내부에 퇴적된 석분 슬러지의 중화 특성을 평가하였다. 세척수의 초기 탁도는 2,264 NTU로 나타났고 재 이용시 1,228 NTU로 높은 탁도를 유지했다. 침전조내 부유 석분 입도(d_(0.5))는 5.1-10.1 μm 수준 이었다. Jar test 에 의한 응집 시험 결과 응집제 농도(1~10 mg/L)가 증가할수록 pH 3~5에서 완속 교반 시간이 길수록 응집효과가 우수하였다. 석분슬러지를 산성광산배수와 반응시킨 결과 미립질 석분 (<1 mm) 에 의해 10분 경과 후 pH를 6 이상 상승 시켰고 용존 Al 및 Fe을 대부분 제거하였다.

키워드

석회석 광산

석분 슬러지

응집침전

중화특성

References

Chin, H.I. and Min, K.W., 2000, “The Possibility of Utilizing Stone Powder Sludges as Adsorbents for Heavy Metals,” Econ. Environ. Geol., Vol. 33, No. 6, pp. 519-524.
Jurjovec, J., Ptacek, C. J. and Blowes, D. W., 2002, “Acid neutralization mechanism and metal release in mine tailings: A laboratory column experiment,” Geochemica et Cosmochimica Acta, Vol. 66, pp. 1511-1523.
Kim, G.M., Kim, D.H., Kang, J.S., Kang, S.S. and Baek, H.J., 2012, “A Study on the Correlation between Uniaxial Compressive Strength and Point Load Strength Index of Limestone of Imgye Area,” TUNNEL & UNDERGROUND SPACE, Vol. 22, No. 5, pp. 330-338.
Korea Aggregates Association, 2006, “Characterizaion and Utilization of Rock Dust from Quarries”
Lee, J.H., Yang, S.H., Choi, C.S. and Bang, K.W., 2011, “Analysis of Coagulation-Flocculation Conditions for the Removal of Tunnel Excavation Wastewater,” J. of Korean Society of Urban Environment, Vol. 11, No. 1, pp. 89-95.
Manahan, A. E., 1979, Environmental chemistry, Willard Grant Press, Boston, pp. 18-20.
Park, J.K., Hong, K.N. and Han, S.H., 2010, “The Devolopment of Structural Aggregate using Waste Stone Powder Sludge,” Korea Concrete Institure 2010 fall meeting, pp. 225-226.
Park, J.L., Kim, B.Y. and Lee, S.H., 2001, “Development of flocculant from stone powder,” J. Korean Society of Environmental Administraion, Vol. 7, No. 3, pp. 337-343.
Snoeyink, V. L. and Jenkins, D., 1980, Water chemistry, John Wiley, New York, pp. 162-173.
Sohn, J.S., Kim, B.G. and Kim, C.K., 1995, “Manufacture of Artificial stone using Waste Stone and Stone Powder,” J. of Korean Inst. of Resources Recycling, Vol. 4, No. 1, pp. 4-11.
Vardaka, E., Cook, C.M., Lanaras, T., Sgardelis, S.P. and Pantis, J.D., 1995, “Effect of dust from a limestone quarry on the photosynthesis of quercus coccifera, an Evergreen Schlerophyllous Shrub,” Environmental contamination and toxicology, Vol. 54, 414-419.
Yim, G.J., Ahn, J.S., Jung, Y.W., Min, D.S. and Baek, H.J., 2009, “An Evaluation of the Infiltration Control of a Soil Cover Overlying Tailings Impoundment,” J. of The Korean Society for Geosystem Engeneering, Vol. 46, No. 3 pp. 351-361.

Information

Publisher :The Korean Society of Mineral and Energy Resources Engineers
Publisher(Ko) :한국자원공학회
Journal Title :Journal of the Korean Society of Mineral and Energy Resources Engineers
Journal Title(Ko) :한국자원공학회지
Volume : 50
No :2
Pages :204-211
DOI :https://doi.org/10.12972/ksmer.2013.50.2.204

[1] Chin, H.I. and Min, K.W., 2000, “The Possibility of Utilizing Stone Powder Sludges as Adsorbents for Heavy Metals,” Econ. Environ. Geol., Vol. 33, No. 6, pp. 519-524.

[2] Jurjovec, J., Ptacek, C. J. and Blowes, D. W., 2002, “Acid neutralization mechanism and metal release in mine tailings: A laboratory column experiment,” Geochemica et Cosmochimica Acta, Vol. 66, pp. 1511-1523.

[3] Kim, G.M., Kim, D.H., Kang, J.S., Kang, S.S. and Baek, H.J., 2012, “A Study on the Correlation between Uniaxial Compressive Strength and Point Load Strength Index of Limestone of Imgye Area,” TUNNEL & UNDERGROUND SPACE, Vol. 22, No. 5, pp. 330-338.

[4] Korea Aggregates Association, 2006, “Characterizaion and Utilization of Rock Dust from Quarries”

[5] Lee, J.H., Yang, S.H., Choi, C.S. and Bang, K.W., 2011, “Analysis of Coagulation-Flocculation Conditions for the Removal of Tunnel Excavation Wastewater,” J. of Korean Society of Urban Environment, Vol. 11, No. 1, pp. 89-95.

[6] Manahan, A. E., 1979, Environmental chemistry, Willard Grant Press, Boston, pp. 18-20.

[7] Park, J.K., Hong, K.N. and Han, S.H., 2010, “The Devolopment of Structural Aggregate using Waste Stone Powder Sludge,” Korea Concrete Institure 2010 fall meeting, pp. 225-226.

[8] Park, J.L., Kim, B.Y. and Lee, S.H., 2001, “Development of flocculant from stone powder,” J. Korean Society of Environmental Administraion, Vol. 7, No. 3, pp. 337-343.

[9] Snoeyink, V. L. and Jenkins, D., 1980, Water chemistry, John Wiley, New York, pp. 162-173.

[10] Sohn, J.S., Kim, B.G. and Kim, C.K., 1995, “Manufacture of Artificial stone using Waste Stone and Stone Powder,” J. of Korean Inst. of Resources Recycling, Vol. 4, No. 1, pp. 4-11.

[11] Vardaka, E., Cook, C.M., Lanaras, T., Sgardelis, S.P. and Pantis, J.D., 1995, “Effect of dust from a limestone quarry on the photosynthesis of quercus coccifera, an Evergreen Schlerophyllous Shrub,” Environmental contamination and toxicology, Vol. 54, 414-419.

[12] Yim, G.J., Ahn, J.S., Jung, Y.W., Min, D.S. and Baek, H.J., 2009, “An Evaluation of the Infiltration Control of a Soil Cover Overlying Tailings Impoundment,” J. of The Korean Society for Geosystem Engeneering, Vol. 46, No. 3 pp. 351-361.

Journal of the Korean Society of Mineral and Energy Resources Engineers ISSN:2288-0291(Print) 2288-2790(Online) 한국자원공학회지

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