Multi-methodological characterisation of Costa Rican biochars from small-scale retort and top-lit updraft stoves and inter-methodological comparison

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dc.date.accessioned2017-03-15T08:00:59Z
dc.date.available2017-03-15T08:00:59Z
dc.date.issued2017-01-13
dc.description.everythingGedruckte Ausg. im Verlag Kassel Univ. Press (www.upress.uni-kassel.de) erschienen.ger
dc.identifier.issn1612-9830
dc.identifier.issn2363-6033
dc.identifier.uriurn:nbn:de:hebis:34-2017010351802
dc.identifier.urihttp://hdl.handle.net/123456789/2017010351802
dc.language.isoeng
dc.publisherKassel University Pressger
dc.rightsUrheberrechtlich geschützt
dc.rights.urihttps://rightsstatements.org/page/InC/1.0/
dc.subjectbiochareng
dc.subjectcharacterisationeng
dc.subjectCosta Ricaeng
dc.subjectrural communitieseng
dc.subject.ddc630
dc.titleMulti-methodological characterisation of Costa Rican biochars from small-scale retort and top-lit updraft stoves and inter-methodological comparisoneng
dc.typeAufsatz
dcterms.abstractWe applied common (pH, elemental analysis, thermogravimetry) and less-common (infrared spectroscopy, GACS adsorption test, pyrolysis-GC-MS, hydrogen pyrolysis) analytical procedures to a set of biochars from Costa Rica (bamboo stalk, cacao chaff, sawmill scrap, coconut husk and orchard prunings feedstocks). The biochars were produced by high temperature combustion in a top-lit updraft stove (TLUD) and low temperature anaerobic charring in a retort (RET), the latter of which was heated by the gas that evolved from the TLUD. The RET biochars exhibit a smaller adsorption capacity, higher molecular diversity and larger proportion of thermolabile materials, because of the lower degree of thermochemical alteration (DTA) and therefore limited formation of the microporous polycondensed aromatic matrix typical of the TLUD biochars. Multivariate statistics showed that DTA, not feedstock composition, controls biochar organic chemistry. The TLUD biochars might be better candidates for soil amendment because of their adsorption capacities and will probably exert a more prolonged effect because of their chemical stability. The cross-comparison of the methods showed the complementarity of especially elemental analysis, GACS, thermogravimetry, hypy and pyrolysis-GC-MS.eng
dcterms.accessRightsopen access
dcterms.bibliographicCitationIn: Journal of Agriculture and Rural Development in the Tropics and Subtropics. Kassel : Kassel University Press. - Vol. 118, No. 1 (2017), S. 1-15
dcterms.creatorKaal, Joeri
dcterms.creatorCalvelo, Roberto
dcterms.creatorDonnelly, Art
dcterms.creatorMcBeath, Anna
dcterms.creatorMartínez Cortizas, Antonio
dcterms.creatorMcLaughlin, Hugh

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Vol 118, No 1 (2017)