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Received July 2, 2017
Accepted August 21, 2017
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Effects and optimization of initial pH and sewage sludge compost content on leaching of lead and zinc in contaminated soil
Department of Environmental Engineering, College of Engineering, Kangwon National University, Chuncheon, Gangwon-do 24341, Korea
johnghwa@kangwon.ac.kr
Korean Journal of Chemical Engineering, December 2017, 34(12), 3150-3155(6), 10.1007/s11814-017-0234-7
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Abstract
We investigated the effects of initial pH (2≤pH0≤6) and sewage sludge compost content (5≤[SSC]≤25 g/ kg) on leaching characteristics of lead (Pb) and zinc (Zn) in contaminated field soil. pH0 and [SSC] significantly affected the leaching of Pb and Zn in soils contaminated with them. The pH in the solution increased as reaction time and [SSC] increased. The leached amounts of Pb and Zn were highest at pH0=2 and increased with reaction time. As [SSC] increased, the leached amount of Pb decreased (50.4mg/kg at control condition ([SSC]=0 g/kg); 22.9mg/kg at [SSC]=25 g/kg at pH0=2) and the leached amount of Zn increased (20.1mg/kg at [SSC]=0 g/kg; 31.7mg/kg at [SSC]=25 g/kg at pH0=2). The change increased as pH0 decreased. Within the design boundaries, minimum leaching of Pb (14.7mg/kg) occurred at pH0=5.1 and [SSC]=25 g/kg, and minimum leaching of Zn (5.0mg/kg) occurred at pH0=5.1 and [SSC]=5 g/kg.
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References
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Qi Y, Szendrak D, Yuen RTW, Hoadley AFA, Mudd G, Chem. Eng. J., 166(2), 586 (2011)
Gusiatin ZM, Kulikowska D, Environ. Technol., 37, 1 (2016)
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Cappuyns V, Swennen R, J. Hazard. Mater., 158(1), 185 (2008)
Van Herreweghe S, Swennen R, Cappuyns V, Vandecasteele C, J. Geochem. Explor., 76, 113 (2002)
Lee CG, Chon HT, Jung MC, Appl. Geochem., 16, 1377 (2001)
El-Azeem SAA, Ahmad M, Usman AR, Kim KR, Oh SE, Lee SS, Ok YS, Environ. Earth Sci, 70, 3411 (2013)
Li Z, Xu X, Pan G, Smith P, Cheng K, Agr. Water Manage., 172, 31 (2016)
Impellitteri CA, Sci. Total Environ., 345, 175 (2005)
APHA, Standard methods for the examination of water and wastewater, 22nd Ed., American Public Health Association, Washington, D.C. (2012).
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Kim IS, Lee JU, Jang A, J. Chem. Technol. Biotechnol., 80(12), 1339 (2005)
Chen SY, Lin PL, Sep. Purif. Technol., 71(2), 178 (2010)
Fang W, Wei YH, Liu JG, J. Hazard. Mater., 310, 1 (2016)
Karami N, Clemente R, Moreno-Jimenez E, Lepp NW, Beesley L, J. Hazard. Mater., 191(1-3), 41 (2011)
Melamed R, Cao X, Chen M, Ma LQ, Sci. Total Environ., 305, 117 (2003)
Kumpiene J, Lagerkvist A, Maurice C, Waste Manage., 28, 215 (2008)
Alvarez EA, Mochon MC, Sanchez JJ, Rodriguez MT, Chemosphere, 47, 765 (2002)
Montgomery DC, Design and analysis of experiments, 5th Ed., Wiley, New York (2001).
