Bogush, AA;
Stegemann, JA;
Williams, R;
Wood, IG;
(2018)
Element speciation in UK biomass power plant residues based on composition, mineralogy, microstructure and leaching.
Fuel
, 211
pp. 712-725.
10.1016/j.fuel.2017.09.103.
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Bogush et al (2018) Element speciation in UK biomass power plant residues based on composition, mineralogy, microstructure & leaching (Accepted manuscript for RPS).pdf - Accepted Version Download (1MB) | Preview |
Abstract
Biomass ash management is an escalating issue in many countries because of increasing numbers of biomass power plants. Comprehensive characterization of biomass ashes with emphasis on element speciation, and solubility of nutrients (e.g., K and P) and pollutants is essential for potential utilization of these residues for soil nutrition. All the UK biomass ashes investigated, whether from combustion of poultry litter, meat and bone meal, and straw, were alkaline and contained high concentrations of P, K, and Ca. The biomass air pollution control (APC) residues were enriched in K, Cl, S and Zn, and contained less lithophile elements, such as Al, Ca, P, Mg, Si, Ti, and Ba, compared to the bottom ashes. P appeared in: 1) bottom ashes as apatite and other phosphates (potassium hydrogen phosphate and potassium iron phosphate in the bottom ashes from combustion of poultry litter); 2) APC residues from combustion of poultry litter as potassium sodium calcium phosphate. K is present mainly in sylvite, arcanite, and some phosphates. Na, K, Cl, and S were easily leached by water from the biomass APC residues. However, water leaching of P, Ca, and Mg was very low, with leaching of P possibly controlled by hydroxyapatite. Aqueous Zn, Cu and Pb appear to prevail in the form of neutral and anionic hydroxide complexes, which are toxic and easily accessible chemical forms for live organisms. Application of the poultry litter bottom ashes as a PK fertiliser in agriculture is appropriate. However, direct application of APC residues to agricultural fields is not appropriate but recovery of K and P from that material should be considered.
| Type: | Article |
|---|---|
| Title: | Element speciation in UK biomass power plant residues based on composition, mineralogy, microstructure and leaching |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.fuel.2017.09.103 |
| Publisher version: | http://doi.org/10.1016/j.fuel.2017.09.103 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Biomass, Bottom ash, Fly ash, APC residue, Element speciation, Leaching, Phosphorous, Potassium, Fertiliser |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Civil, Environ and Geomatic Eng UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Earth Sciences |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10053657 |
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