Effect of black rice husk ash substituted OPC on strength and leaching of solidified plating sludge
Keywords:Black rice husk ash, Strength, Leachability
AbstractStrength and leachability of the solidified plating sludge using OPC and BHA as solidification binders were investigated. BHA was used to replace OPC at 0, 20 and 30 wt.%, and was used to solidify 30 and 50 wt.% of the plating sludge. Results showed that no strength was observed during the first 7 days of curing when OPC was used to solidify the plating sludge. But when 20 and 30 wt.% of BHA were used to substitute OPC, the solidified wastes containing 50 wt.% of the plating sludge gave strength of 4.5 kg/cm2 at the age of 3 and 4.1 kg/cm2 at the age of 7 days, respectively. Leachability of Zn and Cr from the solidified wastes containing all level of the plating sludge did not exceed the criteria for waste acceptable at landfills, which is regulated at 100 and 25 mg/m2 by NEN 7375;2004. The dominant leaching mechanism for all samples was surface wash-off.
Agency, U.S.E.P. 2005. Determination of leaching of inorganic components with the diffusion test 'The Tank Test’. Netherlands Normalisation Institute Standard.
Asavapisit, S., Naksrichum, S. and Harnwajanawong, N. 2005. Strength, leachability and microstructure characteristics of cementbased solidified plating sludge. Cem. Concr. Res. 35(6) : 1042-1049.
Asavapisit, S. and Ruengrit, N. 2005. The role of RHA-blended cement in stabilizing metal- containing wastes. Cem. Concr. Compos. 27(7-8) : 782-787.
Asavapisit, S., Nanthamontry,W. and Polprasert, C. 2001. Influence of condensed silica fume on the properties of cement-based solidified wastes. Cem. Concr. Res. 31 : 1147-1152.
Chatveera, B. and Lertwattanaruk, P. 2009. Evaluation of surface resistance of cement mortars containing black rice husk ash. J. Environ. Manage. 90 : 1435-1441.
Hamilton, I.W. and Sammes, N.M. 1999. Encapsulation of steel foundry bag house dusts in cement mortar. Cem. Concr. Res. 29(1) : 55-61.
Hanna, R.A., Barrie, P. J., Cheeseman, C. R., Hills, C.D., Buchler, P.M. and Perry, R. 1995. Solid state 29Si and 27Al NMR and FTIR study of cement pastes containing industrial wastes and organics. Cem. Concr. Res. 25(7) : 1435-1444.
Hills, C.D., Koe, L., Sollars, C.J. and Perry, R. 1992. Early heat of hydration during the solidification of a metal plating sludge. Cem. Concr. Res. 22 : 822-832.
Hills, C.D., Sollar,C.J. and Perry, R. 1993. Ordinary portland cement based solidification: the role of OPC reviewed. Cem. Concr. Res. 23 : 196-212.
Li, X.D., Poon, C. S., Sun, H., Lo, I. M. C. and Kirk, D. W. 2001. Heavy metal speciation and leaching behaviours in cement based solidified/stabilized waste materials. J. Hazard. Mater. 82 : 215-230.
Olmo, F., Chacon, I.,E. and Irabien, A. 2001. Influence of lead, zinc, iron (III) and chromium (III) oxides on the setting time and strength development of portland cement. Cem. Concr. Res. 31(8) : 1213-1219.
Piyaphanuwat, R., Asavapisit, S. and Buddhawong, S. 2005. Effects of elevated temperature curing on strength and leachability of the solidified wastes using lime and BHA as solidification binde. Suranaree J. Sci. Technol. 12(2) : 91 – 97.
Qian, G., Sun, D.D. and Tay, J.H. 2003. Characterization of mercury- and zinc-doped alkali- activated slag matrix: Part II. Zinc. Cem. Concr. Res. 33(8) : 1257-1262.
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