城市生活垃圾焚烧炉飞灰种子诱导水热合成托伯莫里石

Journal of Residuals Science & Technology Pub Date : 2017-01-01 DOI:10.12783/ISSN.1544-8053/14/S1/2

Dezhi Shi, Chao Zhang Chunyan Hu Jinlu Zhang, Pengfei Li

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引用次数: 5

摘要

城市生活垃圾焚烧炉飞灰的资源化利用受到广泛关注。托伯莫里石是一种重要而稀有的天然矿物，由于其Ca含量高，Si和Al含量低，不能直接由其进行水热合成。选择的外部硅铝助剂包括粉煤灰(CFA)、膨润土、高岭土和硅藻土单独或联合添加。在添加质量为30%的复合添加剂(CFA与硅藻土质量比为1:1)的条件下，在150℃下48h合成托博莫里石效果最好，这主要得益于添加剂调节了合适的元素比例。添加托伯莫里石种子不仅能促进托伯莫里石的大量形成，而且还能抑制辉石和高岭石的生成。由于Ca/(Si + Al) = 1.20, Al/(Si + Al) = 0.20，复合添加剂质量为30%，托贝莫来石种子质量为3%是推荐的工艺参数。

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Seed-induced Hydrothermal Synthesis of Tobermorite from Municipal Solid Waste Incinerator Fly Ash

Resource recovery of municipal solid waste (MSW) incinerator fly ash is widely concerned. Tobermorite, an important but rare naturally mineral, could not be directly hydrothermal synthesized from it owing to its high content of Ca but low concentration of Si and Al. The selected external silicon-aluminum additives including coal fly ash (CFA), bentonite, kaolin and diatomite were solely or combined added. With the addition of 30% mass composite additive in which the ratio of quality for CFA and diatomite is 1:1, tobermorite could be synthesized most effectively in 48h at 150°C, mainly attributing to the proper element proportion adjusted by additives. Tobermorite seed added could not only promote the large formation of tobermorite, but also inhibit the production of hibschite and kaotoite. Since Ca/(Si + Al) = 1.20 and Al/(Si + Al) = 0.20, addition of 30% mass of composite additive and 3% mass of tobermorite seed would be the recommended technological parameter.

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来源期刊

Journal of Residuals Science & Technology 环境科学-工程：环境

自引率

0.00%

发文量

审稿时长

>36 weeks

期刊介绍： The international Journal of Residuals Science & Technology (JRST) is a blind-refereed quarterly devoted to conscientious analysis and commentary regarding significant environmental sciences-oriented research and technical management of residuals in the environment. The journal provides a forum for scientific investigations addressing contamination within environmental media of air, water, soil, and biota and also offers studies exploring source, fate, transport, and ecological effects of environmental contamination.