LEACHING BEHAVIOUR OF Cs-134 IMMOBILISED IN CEMENT-BIOCHAR MATRIX
DOI:
https://doi.org/10.11113/jt.v78.6296Keywords:
Biochar, cement, cesium-134, leaching behaviorAbstract
The leaching behavior of cesium -134 (Cs-134) from cement mixed with 5%, 11% and 18% of biochar has been investigated accordance with the ANSI/ANS 16.1-2003 method. The leachate was collected and measured using gamma spectrometry after the leaching periods of 2 h, 7 h, 24 h, 14 days, 28 days, 43 days and 90 days. In order to evaluate the leaching behavior of Cs-134 from cement biochar matrix, the cumulative leach fraction, leaching rate, diffusion coefficient and leachability index for Cs-134 were calculated. The compressive strength of the specimen after 90 days of leaching test was also performed to evaluate its durability in the water. The results indicated that the addition of biochar affects the leaching behavior of Cs-134 from the cement matrix. The optimum amount of biochar required to obtain the lowest leachability and the highest compressive strength of Cs-134 was found to be at 11%. The leaching of Cs-134 from cement-biochar matrix was found less than 20%, in which the leaching behavior approximates that of a semi-infinite medium. The leachabilty indices of all specimens were above the recommend minimum value of 6, which suggest the leaching behavior of Cs-134 from cement-biochar matrix occurred in a very slow diffusion.Â
References
Sakr, K., Sayed, M. S., and Hafez, M. B. 2003. Immobilization Of Radioactive Waste In Mixture Of Cement, Clay And Polymer. Journal of Radioanalytical and Nuclear Chemistry. 256(2): 179-184.
Ojovon, M. I and Lee, W. E. 2005. An Introduction Of Nuclear Waste Immobilization. Oxford: Elsevier Ltd.
Glasser, F. 2011. Application Of Inorganic Cements To The Conditioning And Immobilisation Of Radioactive Wastes. In Michael Ojovon (ed.) Handbook Of Advanced Radioactive Waste Conditioning Technologies. Woodhead Publishing, Cambridge.
Pleces, I., Pavlovic, R. Pavlovic and S.Pavlovic. 2004. Leaching Behavior Of Co-60 And Cs-137 From Ion Exchange Resins In Cement-Bentonite Clay Matrix. Journal of Nuclear Materials. 327: 171-174.
Manaseer, A. A and L. D Kiel. 1992. Physical Properties of Cement Grout Containing Silica Fume and Super Plasticizer. ACI Mater.J. 89(2): 157-160.
Bagosi, S., Csetenyi, J. 1999. Immobilisation Of Caesiumloaded Ion Exchange Resins In Zeolite-Cement Blends. Cement and Concrete Research. 29: 479-485.
Pleces, I. 2003. Leaching Of 137Cs From Spent Ion Exchange Resins In Cement Bentonite Clay Matrix. Acta Chim.Slov. 50: 593-596.
Chen, C., Chen, G., Chen, L., Chen, Y., Lehmann, J. and McBride, B. 2011. Adsorption Of Copper And Zinc By Biochars Produced From Pyrolysis Of Hardwood And Corn Straw In Aqueous Solution. Bioresource Technology 102(19): 8877-8884.
Yao, Y., M.Inyang, A.R., Zimmerman and X.Cao, 2011. Removal of Phosphate From Aqueous Solution By Biochar Derived From Anaerpbicaly Digested Sugar Beet Tailings, Journal of Hazardous Materials. 190: 501-507.
Tong, X. J, Li, J. Y. and Xu, R. K. 2011. Adsorption of Cu (II) By Biochars Generated From Three Crop Straws. Chemical Engineering. 172(2-3): 828-834.
Kumar, S., Loganathan, V. A., Gupta, R. B. and Barnett, M. O. 2011. An Assessment Of U(VI) Removal From Groundwater Using Biochar Produced By Hydrolthermal Carbonation. Journal of Environmental Management. 92: 2504-2512.
American Nuclear Society. 2004. Measurement Of The Leachability Of Solidified Low-Level Radioactive Wastes By Short-Term Test Procedure. ANSI/ANS-16.1-2003. Illinois: American Nuclear Society.
McCulloch, E. Angus, M. J., Crawford, R. W. and Rahman, A, Glasser, F. P. 1985. Cements In Radioactive Waste Disposal: Some Mineralogical Considerations. Mineralogical Magazine. 49: 211-221.
Abdel Rahman, R. O. and Zaki, A. A. 2009. Assessment Of The Leaching Characteristics Of Incineration Ashes In Cement Matrix. Chemical Engineering Journal. 155: 698-708.
Gilliam, T. M. Sams, T. L. and Pitt, W. W. 1986. Testing Protocols For Evaluating Monolithic Waste Form Containing Mixed Waste. Ceramic Advances. 20: 220-230.
NRC-U.S. Nuclear Regulatory Commission. 1991. Waste Form Technical Position. Revision 1. U.S. Nuclear Regulatory Commission, Washington, D.C
ASTM Standards, 2008. Standard Test Method For Compressive Strength Of Cylindrical Concrete Specimen C39/C39M-05. ASTM International. United States.
IBI. 2012. Standardized Product Definition And Product Testing Guidelines For Biochar That In Used In Soi1. [Online]. From: http://www.biochar-international.org [Accessed on 17 September 2015].
Chen, C., Chen, G., Chen, L., Chen, Y., Lehmann, J. and McBride, B. 2011. Adsorption Of Copper And Zinc By Biochars Produced From Pyrolysis Of Hardwood And Corn Straw In Aqueous Solution. Bioresource Technology. 102(19): 8877-8884.
Krull, E. S. Baldock, J. A. Skjemstad, J. O and Smernik, R. J. 2009. Characteristics of Biochar:organo-chemical Properties. In. Johannes Lehmann and Stephen Joseph (ed.). Biochar Environmental Management: Science and Technology. United States: Eco Publishing.
Lehmann, J. and Joseph, S. 2009. Biochar For Environmental Management: An Introduction. In Johannes Lehmann and Stephen Joseph (ed.). Biochar Environmental Management: Science and Technology. United States: Eco Publishing.
Tan, X., Liu, Y., Zeng, G., Wang, X., Hu, X., Gu, Y. and Y. Z. 2015. Application Of Biochar For The Removal Of Pollutants From Aqueous Solutions. Chemosphere. 125: 70-85.
El-Doussouky, M. I., El-Masry, H. E., El-Kamash, A. M. and El-Shahat, M. F. 2012. Leaching And Mechanical Properties Of Cement-Polyacrylamide Composite Developed As Matrices For Immobilization Of Cs-137 and Co-60 Radionuclides. Nature and Science. 10(12): 172-177.
Bae, K. S. and Lee, J. O. 1996. Immobilization of Ion-Exchnage Resins With A Mixture Of Cement And WEP/Zeolan 900-Na Additives And Radionuclides Leaching. Environ. Eng. Res. 2(1): 61-71.
Sun, Q., Li, J. and Wang, J. 2011. Solidification Of Borate Radioactive Resins Using Sulfoalumintae Cement Blending With Zeolite. Nuclear Engineering and Design. 241: 5308-5315.
Abdel Rahman, R. O., Rakhimov, R. Z., Rakhimova, N. R. and Ojovon, M. I. 2015. Cementitious Materials For Nuclear Waste Immobilization. United Kingdom: Wiley.
Gilliam, T. M., and Wiles, C. C. 1996. Stabilization and Solidification of Hazardous, Radioactive, and Mixed Waste. United States of America: ASTM Publication.
Weng, T. L. and Cheng, A. 2013. Influence of Curing Environment on Concrete with Crystalline Admixture. Monatshefte für Chemie-Chemical Monthly. 145:195-200.
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