Journal
WASTE MANAGEMENT
Volume 33, Issue 11, Pages 2157-2169Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.wasman.2013.06.013
Keywords
Carbon sequestration; Nitrogen mineralisation; Molecular mixing model; Detergent fibre analysis; Lignin; NMR
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Funding
- LV Rawlinson & Associates Pty Ltd. Gerroa, NSW
- Cleanaway, Transpacific Industries Pty Ltd., Padstow, NSW
- NSW Department of Environment
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Using solid state C-13 NMR data and elemental composition in a molecular mixing model, we estimated the molecular components of the organic matter in 16 recycled organic (RO) wastes representative of the major materials generated in the Sydney basin area. Close correspondence was found between the measured NMR signal intensities and those predicted by the model for all RO wastes except for poultry manure char. Molecular nature of the organic matter differed widely between the RO wastes. As a proportion of organic C, carbohydrate C ranged from 0.07 to 0.63, protein C from <0.01 to 0.66, lignin C from <0.01 to 0.31, aliphatic C from 0.09 to 0.73, carbonyl C from 0.02 to 0.23, and char C from 0 to 0.45. This method is considered preferable to techniques involving imprecise extraction methods for RO wastes. Molecular composition data has great potential as a predictor of RO waste soil carbon and nutrient outcomes. (C) 2013 Elsevier Ltd. All rights reserved.
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