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A simultaneous assessment of organic matter and trace elements bio-accessibility in substrate and digestate from an anaerobic digestion plant
Umeå University, Faculty of Science and Technology, Department of Chemistry.
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2019 (English)In: Bioresource Technology, ISSN 0960-8524, E-ISSN 1873-2976, Vol. 288, article id 121587Article in journal (Refereed) Published
Abstract [en]

This study evaluates a simultaneous assessment of organic matter (OM) and trace elements (TE) bio-accessibility in substrate and digestate from a full-scale anaerobic digester by a sequential OM extraction method. Simultaneous release of TE was determined along with the extraction of different OM fractions and the effects of extracting reagents on characteristics of OM were evaluated by nuclear magnetic resonance (NMR) spectroscopy. The reagents used for sequential extraction of OM were not enough selective. However, proteins were particularly removed by 0.1 M NaOH, while 72% H2SO4 mainly extracted hemicellulose and cellulose. The OM fractionation allowed for simultaneous extraction of > 60% of total As, Cd, Co, Fe, Mn, Ni and Zn, while the extraction was limited for Al, Cr, Cu, Mo, and Pb. In substrate, > 50% of total As, Co, Mn and Ni and < 40% of total Fe, Zn and Mo were identified in bio-accessible fractions. In digestate, all elements demonstrated poor bio-accessibility except for As.

Place, publisher, year, edition, pages
Elsevier, 2019. Vol. 288, article id 121587
Keywords [en]
Sequential chemical extraction, Organic matter fractionation, Trace elements fractionation, NMR spectroscopy, Anaerobic co-digestion
National Category
Biochemistry and Molecular Biology
Identifiers
URN: urn:nbn:se:umu:diva-161497DOI: 10.1016/j.biortech.2019.121587ISI: 000472018100008PubMedID: 31200348OAI: oai:DiVA.org:umu-161497DiVA, id: diva2:1337257
Available from: 2019-07-12 Created: 2019-07-12 Last updated: 2019-07-12Bibliographically approved

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Hedenström, Mattias

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