School of Chemistry and Chemical Engineering, Guangxi University, Nanning, 530004, China.
Environ Sci Pollut Res Int. 2018 Mar;25(8):7433-7442. doi: 10.1007/s11356-017-1083-y. Epub 2017 Dec 26.
The purpose of this research was to evaluate the properties and dynamic changes of humic acids (HA), fulvic acids (FA), hydrophobic neutrals (HoN), and hydrophilic (Hi) fractions of dissolved organic matter (DOM) during food waste and sugarcane leaves co-composting process. The pools of HA, FA, HoN, and Hi were separated from DOM by fractionation method, and characterized using spectroscopic (UV-vis, FTIR) and pyrolysis-GC/MS analyses. The least peaks in the HA pool were found in FTIR spectra with the simple structure in HA. The highest value of SUV was observed in HA, indicating that the HA pool played a dominant role in aromaticity of DOM. Hydrophobic compounds (HA, FA, HoN) had higher percentages of alkanes and cyclo-alkanes at the end of composting, while lower contents in the Hi pool. Both DOM and its subfractions increased the Chinese flowering cabbage (Brassica campestris L.) seed germination rate (SGR), whereas HA had a significant effect on promoting the root growth.
本研究旨在评估在厨余垃圾和甘蔗叶共堆肥过程中，溶解性有机质（DOM）中腐殖酸（HA）、富里酸（FA）、疏水性中性（HoN）和亲水性（Hi）组分的特性及其动态变化。采用分级方法从 DOM 中分离出 HA、FA、HoN 和 Hi 组分，并通过光谱（UV-vis、FTIR）和热解 GC/MS 分析进行表征。在 HA 池的 FTIR 光谱中，HA 的结构简单，其峰最小。HA 池的 SUV 值最高，表明 HA 池在 DOM 的芳香性中起主导作用。疏水性化合物（HA、FA、HoN）在堆肥结束时具有更高比例的烷烃和环烷烃，而 Hi 池中的含量较低。DOM 及其亚组分均提高了白菜（Brassica campestris L.）种子发芽率（SGR），而 HA 对促进根生长有显著影响。
