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

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dc.date.accessioned2020-03-10T13:28:19Z
dc.date.available2020-03-10T13:28:19Z
dc.date.issued2020-03-05
dc.description.sponsorshipGefördert durch den Publikationsfonds der Universität Kassel
dc.identifierdoi:10.17170/kobra-202003101054
dc.identifier.urihttp://hdl.handle.net/123456789/11474
dc.language.isoengeng
dc.relation.doidoi:10.1186/s40538-019-0171-2
dc.rightsNamensnennung - Weitergabe unter gleichen Bedingungen 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-sa/4.0/*
dc.subjectcalcium carbonate equivalenceeng
dc.subjectelectrical conductivityeng
dc.subjectsolid wasteeng
dc.subjecttrace elementseng
dc.subjectx-ray diffractioneng
dc.subject.ddc630
dc.titleCharacterization of charcoal and firewood ash for use in African peri-urban agricultureeng
dc.typeAufsatz
dc.type.versionpublishedVersion
dcterms.abstractBackground 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.eng
dcterms.accessRightsopen access
dcterms.creatorNeina, Dora
dcterms.creatorFaust, Sibylle
dcterms.creatorJörgensen, Rainer Georg
dcterms.source.identifierISSN: 2196-5641
dcterms.source.journalChemical and biological technologies in agricultureeng
dcterms.source.pageinfo7
dcterms.source.volumeVolume 7
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