Abstract
The aim of the present work is to attain an overall characterization of solid residues from biomass gasification. Besides the determination of chemical and physical properties, the work was focused on the study of leaching behaviour. Compliance and pH-dependence leaching tests coupled with geochemical modelling were carried out both on fresh and aged samples. The results showed that the material is comparable to residues from wood combustion and the leaching behaviour was dominated by Ca-containing minerals and solid solutions. Heavy metals were detected in very low concentrations in the bulk composition, and DOC complexation and sorption mechanisms were found to have a great influence on their release. Like wood combustion residues, the analysed ashes could be relevant for recycling in agriculture or forestry because of the potential as liming agent and source of macroelements. However, the high reactivity turned out to limit this utilization option, even after ageing processes.
Original language | English |
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Title of host publication | Sardinia 2011, Thirteenth International Waste Management and Landfill Symposium |
Place of Publication | Italy |
Publisher | CISA |
Publication date | 2011 |
Publication status | Published - 2011 |
Event | 13th International Waste Management and Landfill Symposium - S. Margherita di Pula, Cagliari, Italy Duration: 3 Oct 2011 → 7 Oct 2011 Conference number: 13 |
Conference
Conference | 13th International Waste Management and Landfill Symposium |
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Number | 13 |
Country/Territory | Italy |
City | S. Margherita di Pula, Cagliari |
Period | 03/10/2011 → 07/10/2011 |