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OALib Journal期刊
ISSN: 2333-9721
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超临界水无害化共处理PVC和医疗垃圾焚烧飞灰的可行性探讨
Keywords: 超临界水氧化,PVC,医疗垃圾焚烧飞灰,提取,重金属
Abstract:
采用超临界水氧化降解PVC同时无害化处理医疗垃圾焚烧飞灰，利用PVC脱氯形成的中间产物盐酸提取医疗垃圾焚烧飞灰中的重金属，达到飞灰无害化的目的。结果显示，超临界水可以将飞灰颗粒打碎，从而提高盐酸提取重金属的速率和效果，但是在超临界水中还存在重金属的固定过程，过长的反应时间和过高的反应温度都会降低重金属的提取效率。在提取过程中，Cu和Zn优先于Pb被盐酸浸出，而Pb被浸出后很容易被超临界水进一步固定。综合考虑重金属在超临界水中的变化特性，总结出超临界水处理飞灰和PVC的最佳条件为：PVC与飞灰质量比0.5∶
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