Characterization of charcoal and firewood ash for use in African peri‑urban agriculture

Show simple item record Neina, D. Faust, S. Joergensen, R.G. 2020-07-08T13:30:28Z 2020-07-08T13:30:28Z 2020-03-05
dc.identifier.citation Neina, D., Faust, S. & Joergensen, R.G. Characterization of charcoal and firewood ash for use in African peri-urban agriculture. Chem. Biol. Technol. Agric. 7, 5 (2020). en_US
dc.description Research Article en_US
dc.description.abstract Background: Ample quantities of ashes generated from domestic biomass energy combustion in Ghanaian kitchens are currently disposed of despite their potential agricultural value. This study aimed to investigate the potential agricultural value of charcoal and firewood ashes in terms of differences in the chemical and mineralogical compositions, and to identify the suitability of aqua regia, H2SO4, vinegar and distilled water to extract plant nutrients (Ca, Mg, K, Na, and P). The chemical compositions were determined by atomic absorption spectrometry after extractions with aqua regia, H2SO4, vinegar and distilled water while mineralogy was determined by X-ray powder diffraction. Results: The charcoal ash had 0.2 units, 13 ds m−1, and 7% higher (P < 0.05) pH, EC, and CCE, respectively, than the firewood ash, whereas the latter had 6, 17, 43, and 139 μg g−1 higher (P < 0.05) As, Cu, Mg, and Zn contents, respectively, and more minerals with 86% being Mg-rich. Calcite and calcium oxide were the dominant minerals occurring in both ashes followed by calcium manganate ( CaMnO3). Aqua regia and vinegar were suitable for Ca, acidic solutions for Mg, H2SO4 and aqua regia for P with Na and K being virtually soluble in all solutions. Lead, Mn, Ni, and Zn had values in the order of hundreds. Conclusions: Although the ashes differ, they both contain trace elements whose bioavailability may differ and may not necessarily lead to plant uptake after field application. This offers an opportunity for further research into the threshold trace element contents of wood ash and their relationship with plant uptake in different soil pH and soil types. en_US
dc.description.sponsorship University of Kassel Strategic Research Fund en_US
dc.language.iso en en_US
dc.publisher Chemical and Biological Technologies in Agriculture en_US
dc.relation.ispartofseries 7;5
dc.subject Calcium carbonate equivalence en_US
dc.subject Electrical conductivity en_US
dc.subject Solid waste en_US
dc.subject Trace elements en_US
dc.subject X-ray diffraction en_US
dc.title Characterization of charcoal and firewood ash for use in African peri‑urban agriculture en_US
dc.type Article en_US

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