Stabilized Nickel and Copper in a Ceramic Matrix and Their Leaching Behavior

文献类型： 外文期刊

第一作者： Tang, Yuanyuan

作者： Tang, Yuanyuan;Liu, Chengshuai;Shih, Kaimin

作者机构：

期刊名称：Geo-Chicago 2016: Sustainable Waste Management and Remediation

ISSN： 0895-0563

年卷期： 2016 年 273 期

页码：

收录情况： SCI

摘要： For waste solids contaminated by hazardous metals, stabilization through thermal treatments can provide an opportunity to reduce the metal release. However, mechanisms of such stabilization strategies were not clearly identified. Many waste-to-resource strategies are employed via using metal contaminated solids in a wide variety of applications, scientific investigations, and quantitative evaluation of the stabilization effects. The understanding of the metal incorporation efficiencies achieved by different metal stabilization mechanisms is also important to assist the design of reliable treatment strategies. This study investigated the incorporation mechanisms between ceramic precursors and hazardous metals (nickel and copper) under different thermal conditions. The results show the important role of forming aluminates and ferrites to significantly reduce metal leachability from products. Quantitative X-ray diffraction (XRD) technique and the prolonged leaching tests were applied to report the metal incorporation efficiencies. The metal leaching behavior on different water-mineral interfaces was also analyzed, together with the examination on the chemical composition of leached surface via the X-ray photoelectron spectroscopy (XPS) technique. With the provided information, this study identified the key mechanisms of stabilizing nickel and copper in the ceramic matrix and also demonstrates the importance of quantitative understanding in the development of safer waste-to-resource strategies.

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