Preparation of cementitious material using smelting slag and tailings and the solidification and leaching of Pb2+

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Abstract

The composite cementitious materials were prepared with lead-zinc tailings, lead-zinc smelting slag, and cement clinker. The effect of material ratio on the mechanical properties, the phase analysis, and microstructures were investigated. The effect of the pH and stripping time on the leaching amount of lead ion was discussed. The results show that the additive amount of the tailings should be minimized for the cementitious materials meeting the strength requirements, controlled within 10%. The leaching amount of cementitious materials remains low in a larger range of pH, which can effectively reduce the leaching of heavy metal lead. The leaching kinetics of lead ions in the three kinds of samples could be better described by the pseudo-second-model.

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Zhang, D., Shi, S., Wang, C., Yang, X., Guo, L., & Xue, S. (2015). Preparation of cementitious material using smelting slag and tailings and the solidification and leaching of Pb2+. Advances in Materials Science and Engineering, 2015. https://doi.org/10.1155/2015/352567

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