School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, PR China.
School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, PR China.
Bioresour Technol. 2016 Nov;219:169-174. doi: 10.1016/j.biortech.2016.07.125. Epub 2016 Jul 29.
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.
为了评估烟气脱硫石膏（FGDG）添加剂对堆肥过程中腐殖质（HS）特性和演变的影响，从添加 FGDG 的堆肥（CPG）和未添加 FGDG 的堆肥（CP）中提取了 HS，并对其粒径、元素分析、傅里叶变换红外光谱（FTIR）和紫外可见光谱（UV-vis）进行了评估，同时通过热解气相色谱/质谱法（Py-GC/MS）对 HS 的分子组成进行了表征。HS 的粒径在 300 至 600nm 之间，呈双峰分布。随着堆肥的进行，HS 的 C/H 增加，C/N 减少。FTIR 和 UV-vis 光谱表明，HS 的芳构化在堆肥过程中得到了促进。添加 FGDG 增加了 HS 的不饱和程度和芳构化程度。Py-GC/MS 表明，添加 FGDG 后，烷烃水平降低，苯和含氮化合物水平升高。CPG 中 HS 的含氮化合物明显高于 CP 中的 HS。
