Spectroscopic evidence for biochar amendment promoting humic acid synthesis and intensifying humification during composting

Wang, Cheng, Tu, Qiaoping, Dong, Da, Strong, P. J., Wang, Hailong, Sun, Bin and Wu, Weixiang (2014) Spectroscopic evidence for biochar amendment promoting humic acid synthesis and intensifying humification during composting. Journal of Hazardous Materials, 280 409-416. doi:10.1016/j.jhazmat.2014.08.030


Author Wang, Cheng
Tu, Qiaoping
Dong, Da
Strong, P. J.
Wang, Hailong
Sun, Bin
Wu, Weixiang
Title Spectroscopic evidence for biochar amendment promoting humic acid synthesis and intensifying humification during composting
Journal name Journal of Hazardous Materials   Check publisher's open access policy
ISSN 1873-3336
0304-3894
Publication date 2014-09-15
Year available 2014
Sub-type Article (original research)
DOI 10.1016/j.jhazmat.2014.08.030
Open Access Status
Volume 280
Start page 409
End page 416
Total pages 8
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Collection year 2015
Language eng
Abstract Despite the many benefits of biochar amendment in composting, little information is available about its effects on organic matter humification during the process. In this study the analytical results for two in-vessel composting piles were compared, one amended with biochar (VPSB, pig manure + sawdust + biochar) and the other serving as a control (VPS, pig manure + sawdust). During the 74 days of humification, the increased content of humic acid carbon in VPSB is 16.9% more than that of the control. Spectroscopic analyses show a higher O-alkyl C/alkyl C ratio and aromaticity in VPSB at the thermophilic phase, and peak intensities of fulvic-like and humic-like substances were achieved faster in VPSB than VPS. These data inferred that biochar amendment promoted the neo-synthesis of humic acids and intensified the humification of pig manure. Increase in carboxylic groups of biochar as a result of oxidation reactions and sorption of humic substances may correspond to the faster formation of aromatic polymers in biochar-supplemented composting pile. The results suggest that biochar amendment might be a potential method to enhance humification during pig manure composting.
Keyword EEM
FT-IR
13C-NMR
Composting
Biochar
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Civil Engineering Publications
School of Chemical Engineering Publications
Official 2015 Collection
 
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