title: The influence of flue gas desulphurization gypsum additive on characteristics and evolution of humic substance during co-composting of dairy manure and sugarcane pressmud.
abstract: For the purpose of evaluating the effect of flue gas desulphurization gypsum (FGDG) additive on characteristics and evolution of humic substance (HS) during composting, HS from composts with FGDG (CPG) and without FGDG (CP) were extracted and assessed with respect to their particle size, elemental analysis, FTIR and UV-vis spectroscopy, and the molecular composition of HS was characterized via pyrolysis-GC/MS as well. The particle size of HS ranged between 300 and 600nm, representing a bimodal distribution. As composting proceeded, the C/H of HS increased, and C/N decreased. The FTIR and UV-vis spectroscopy indicated that the aromatization of HS was promoted over the composting process. Adding FGDG increased the unsaturated degree and aromatization of HS. Pyrolysis-GC/MS showed the level of alkane decreased, and the level of benzene and nitrogen compounds increased upon the addition of FGDG. The nitrogen compounds of HS in CPG was significantly higher than that in CP.
authors.affiliation: School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, PR China.
authors.forename: Xiaobo
authors.initials: X
authors.lastname: Guo
authors.affiliation: School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, PR China.
authors.forename: Junhao
authors.initials: J
authors.lastname: Huang
authors.affiliation: School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, PR China.
authors.forename: Yanyu
authors.initials: Y
authors.lastname: Lu
authors.affiliation: School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, PR China.
authors.forename: Guangchun
authors.initials: G
authors.lastname: Shan
authors.affiliation: School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, PR China. Electronic address: liqunliang231@163.com.
authors.forename: Qunliang
authors.initials: Q
authors.lastname: Li
mesh_terms: D002133:Calcium Sulfate / Q000737:chemistry*; D005740:Gases / Q000032:analysis; D006812:Humic Substances / Q000032:analysis; D008372:Manure; D031786:Saccharum / Q000737:chemistry*; D012987:Soil / Q000737:chemistry*; D013057:Spectrum Analysis
chemical_list: D005740:Gases; D006812:Humic Substances; D008372:Manure; D012987:Soil; D002133:Calcium Sulfate
keywords: Composting; Flue gas desulphurization gypsum; Humic substance; Pyrolysis-GC/MS