Abstract Hazardous materials like barium and lead present in discarded Cathode Ray Tubes, CRT's, may represent a big problem to the environment if they are not properly disposed. In the present study, solidification/stabilization of crushed waste CRT (CRT glass particles), through a calcined kaolin base-geopolymer as metal-immobilizer is presented. Two different compositions of raw materials using 5, 10, and 20% wt of CRT glass particles were studied. The geopolymers were analyzed by XRD, SEM, TG-DTA/DSC, FTIR, leaching tests. The microhardness of coatings on mild steel was tested. The results and the differences in properties are explained based on the microstructure evolution of the geopolymer with CRT glass particles. The results showed that low alkaline medium was effective in the encapsulation of toxic heavy metals from the CRT glass even though they were used as coatings on mild steel samples.

中文翻译：

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使用煅烧高岭土基地质聚合物封装废弃 CRT 中的有毒重金属

摘要 废弃的阴极射线管 (CRT) 中含有的钡和铅等有害物质，如果处理不当，可能会对环境造成严重问题。在本研究中，展示了通过煅烧高岭土基地质聚合物作为金属固定剂对粉碎的 CRT（CRT 玻璃颗粒）进行固化/稳定化。研究了使用 5%、10% 和 20% wt 的 CRT 玻璃颗粒的两种不同原材料组成。通过XRD、SEM、TG-DTA/DSC、FTIR、浸出试验对地质聚合物进行了分析。测试了低碳钢涂层的显微硬度。结果和性能的差异基于具有 CRT 玻璃颗粒的地质聚合物的微观结构演变来解释。