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Results about rice husk composition and stabilization efficacy

The results about efficacy in terms of heavy metals stabilization, obtained by using rice husks from different location resulted very interesting. In particular it was found that rice husks from different location have different composition and different capability to burn.

 

The results are reported in a paper that was just published.

 

TITLE:

Comparison between rice husk ash grown in different regions for stabilizing fly ash from a solid waste incinerator

JOURNAL:

Journal of Environmental Management 159 (2015) 128-134

ABSTRACT:

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 e namely from Japonica rice grown in Italy and Indica rice grown in India e 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 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 stabi- lization yields by the two RHA.

 


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