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| 城市垃圾焚烧飞灰物理化学性质及重金属风险分析 |
| Physicochemical properties and risk assessment of heavy metals in the incinerated municipal solid waste fly ash |
| 投稿时间：2022-06-28 |
| DOI：10.13259/j.cnki.eri.2023.01.001 |
| 中文关键词: 飞灰 化学组分 重金属 浸出毒性 风险评估 |
| 英文关键词:fly ash chemical composition heavy metals leaching toxicity risk assessment |
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| 中文摘要: |
| 对7种城市垃圾焚烧飞灰的物理化学性质进行了详细表征。针对飞灰中重金属成分复杂的特点对重金属含量、形态分布和浸出毒性进行了分析，并进行了风险评估指数和风险指数计算。飞灰的化学组分和晶相结构分析显示，城市垃圾焚烧飞灰中含有大量的CaO、CaSO4、SiO2、Al2O3、NaCl和KCl等化合物，具有资源化利用的潜力。但同时飞灰中含有大量的重金属，其中Pb和Cd的生态风险高，浸出毒性高于飞灰直接处理和处置要求。研究结果表明，垃圾焚烧飞灰需进行处理至达到一定要求后才能进行资源化利用。 |
| 英文摘要: |
| Physicochemical properties of fly ash samples from 7 municipal solid waste incineration plants were characterized. In terms of their complex composition of heavy metals, the content, speciation, and leaching of heavy metals were determined, and their risk assessment code and risk index were evaluated accordingly. Chemical composition and crystal structure analysis showed that the fly ash samples were rich in CaO, CaSO4, SiO2, Al2O3, NaCl, and KCl etc. and had great potential for recycling. But fly ash contained large amounts of heavy metals. Among them, Pb and Cd were highly hazardous to the environment and their leaching concentration exceeded the limitation of relevant national standards. It indicated that the harmless treatment of fly ash was required before reutilization. |
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