Molecular composition of recycled organic wastes, as determined by solid-state ¹³C NMR and elemental analyses

Eldridge, S.M., Chen, C.R., Xu, Z.H., Nelson, P.N., Boyd, S.E., Meszaros, I., and Chan, K.Y. (2013) Molecular composition of recycled organic wastes, as determined by solid-state ¹³C NMR and elemental analyses. Waste Management, 33 (11). pp. 2157-2169.

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Abstract

Using solid state ¹³C 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.

Item ID: 29160
Item Type: Article (Research - C1)
ISSN: 1879-2456
Keywords: carbon sequestration, nitrogen mineralisation, molecular mixing model, detergent fibre analysis, lignin, NMR
Date Deposited: 05 Sep 2013 23:06
FoR Codes: 04 EARTH SCIENCES > 0402 Geochemistry > 040204 Organic Geochemistry @ 100%
SEO Codes: 96 ENVIRONMENT > 9699 Other Environment > 969999 Environment not elsewhere classified @ 100%
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