期刊
JOURNAL OF ENVIRONMENTAL MANAGEMENT
卷 159, 期 -, 页码 128-134出版社
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jenvman.2015.05.015
关键词
Heavy metals; Stabilization; MSWI fly ash; Rice husk ash (RHA)
资金
- LIFE+
- European Community (LIFE+ project) [ENV/IT/000256]
The Stabilization of heavy metals from municipal solid waste incineration (MSWI) fly ash by rice husk ash (RHA) is under intense study as an effective strategy to recover and reuse industrial and agricultural waste together. We compare the metal entrapment performances of RHA from different Asian rice sources - namely from Japonica rice grown in Italy and Indica rice grown in India - Physicochemical and morphological characterization of the final stabilized material show that the same thermal treatment may result in marked structural differences in the silica contained in the two RHA. Remarkably, one of them displays a crystalline silica content, although obtained by a thermal treatment below 800 degrees C. We also find that the presence of an alkali metal ion (potassium) in the rice husk plays a crucial role in the attainment of the final silica phase. These physicochemical differences are mirrored by different stabilization yields by the two RHA. (C) 2015 Elsevier Ltd. All rights reserved.
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