| 摘要: |
| 通过浸出毒性鉴别试验和长期浸出试验，分析了碱激发水泥（AAC）对重金属和放射性金属的固化效果，并通过X射线衍射、红外光谱、扫描电镜能谱等技术分析了重金属铜的加入对AAC产物微观结构的影响.浸出毒性鉴别试验结果表明：AAC对重金属（铜、铅、镍、锌、镉）均具有较好的固化效果，固化效率在99.97%以上；加入的重金属铜进入AAC产物中，影响AAC产物中O—Si—O键、Al—O—Si键和Si—O—Si键的周围环境，使其振动频率发生变化，但未引起AAC产物化学结构上的变化.长期浸出试验结果表明：AAC对放射性金属（锶、铯）的固化效果好于普通水泥，铯的浸出率明显高于同浸出龄期的锶. |
| 关键词: 碱激发水泥 重金属 放射性金属 固化 微观结构 |
| DOI：10.3969/j.issn.1007 9629.2013.02.023 |
| 分类号: |
| 基金项目: |
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| Solidification Analysis of Heavy Metal and Radioactive Metal by Alkali Activated Cement |
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LI Ke liang1,2
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School of Civil Engineering and Communication, North China University of Water Resources and Electric Power, Zhengzhou 450011, China
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| Abstract: |
| Solidification efficiencies of heavy metals and radioactive metals by alkali activated cement(AAC) were investigated by identification tests for extraction toxicity and long term leaching tests. The influence of heavy metal to AAC microstructure was analyzed by X ray diffraction, Fourier transform infrared spectroscopy(FTIR), scanning microscopy and energy spectroscopy. Results from identification tests for extraction toxicity show that AAC has a good capability to solidify heavy metals. Solidification rates of heavy metals including copper, lead, nickel, zinc and cadmium are above 99.97%. It is proved by FTIR that copper comes into the AAC product and affects vibration frequencies of OSiO |
| Key words: alkali activated cement(AAC) heavy metal radioactive metal solidification microstructure |
