https://scholars.lib.ntu.edu.tw/handle/123456789/409563
Title: | Leaching processes of the dicalcium silicate and copper oxide solidification/stabilization system | Authors: | Lin C.-F. Lin T.-T. Huang T.-H. |
Keywords: | copper oxide; dicalcium silicate; leaching processes; Waste leaching | Issue Date: | 1994 | Journal Volume: | 44 | Journal Issue: | 1-2 | Start page/Pages: | 89-100 | Source: | Toxicological & Environmental Chemistry | Abstract: | Cement 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. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-0028002463&doi=10.1080%2f02772249409358047&partnerID=40&md5=ba3fb0be1f82cc6e0c3ea34e18648a23 https://scholars.lib.ntu.edu.tw/handle/123456789/409563 |
ISSN: | 2772248 | DOI: | 10.1080/02772249409358047 | SDG/Keyword: | Acetic 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; Leaching |
Appears in Collections: | 化學工程學系 |
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