Lin C.-F.Lin T.-T.Huang T.-H.2019-05-212019-05-2119942772248https://www.scopus.com/inward/record.uri?eid=2-s2.0-0028002463&doi=10.1080%2f02772249409358047&partnerID=40&md5=ba3fb0be1f82cc6e0c3ea34e18648a23https://scholars.lib.ntu.edu.tw/handle/123456789/409563Cement based solidification/stabilization technology has been widely practiced for the treatment of inorganic hazardous wastes, especially metal-bearing wastes. The advantage of using the solidification/stabilization process is that the mobility of the hazardous materials is greatly retarded in the final disposal sites. The purpose of this study is to assess the stability of a synthetic solid waste through the renewable leaching test. A major cement constituent, dicalcium silicate (C2S), was used as a model binder to react with copper oxide to form a solid waste matrix. The semi-dynamic leaching test using 1 N acetic acid was employed to investigate the leaching characteristics of the C2S/CuO system. The results show that the dissolution of Ca(OH)2 is the primary mechanism for the destruction of the matrix, and the subsequent leaching of copper ion. The surface-controlled dissolution reaction increases the pore size and porosity of the matrix, thus increasing the diffusion rate of copper ion transport. The C2S hydration product, silicate hydrate, might play a role in adsorbing the copper ion in the leaching system. © 1994, Taylor & Francis Group, LLC. All rights reserved.copper oxide; dicalcium silicate; leaching processes; Waste leaching[SDGs]SDG7[SDGs]SDG12Acetic acid; Calcium compounds; Copper; Copper oxides; Diffusion; Dissolution; Hazardous materials; Hydrates; Industrial wastes; Porosity; Solidification; Stabilization; Dicalcium silicate; Metal bearing waste; Pore size; Silicate hydrate; Solid waste; Leachingjournal article10.1080/027722494093580472-s2.0-0028002463