Spectral study of dissolved organic matter in biosolid during the composting process using inorganic bulking agent: UV-vis, GPC, FTIR and EEM
Spectral study of dissolved organic matter in biosolid during the composting process using inorganic bulking agent: UV-vis, GPC, FTIR and EEM
复制标题
使用无机填充剂对堆肥过程中生物固体中溶解的有机物进行光谱研究：UV-vis、GPC、FTIR 和 EEM
DOI：
10.1016/j.ibiod.2013.03.033
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发表时间：
2013-11-01
影响因子：
4.8
通讯作者：
Ren, Nanqi
中科院分区：
文献类型：
--
作者：
Wang, Ke;Li, Weiguang;Ren, Nanqi
通过紫外-可见光谱结合凝胶渗透色谱（GPC）、傅里叶变换红外（FTIR）光谱和激发-发射矩阵（EEM）荧光光谱评估了从生物固体中提取的溶解有机物（DOM）在100天堆肥过程中的化学变化。采用浮石作为无机填充剂，消除常规有机材料对生物固体样品分析结果的影响。结果表明，生物固体提取物的DOC/DTN（1.97-0.83）明显低于生物固体样品的C/N（6.88-7.84）；低DOC/DTN比和DOM较差的生物降解性与生物固体堆肥过程中氮的损失有重要关系。堆肥100天后，水提取物的SUVA(254)和SUVA(280)分别比原始生物固体高17.6和18.6倍。两者均被证明是评价生物固体稳定性程度的有效指标。 DOM的光谱分析表明，在堆肥的活跃阶段，芳香蛋白显着下降，类腐殖酸有机物明显上升，类黄腐酸物质略有增加。在固化阶段观察到具有一定量的羧基和芳香族结构的较大分子的形成。 (C) 2013 年，爱思唯尔有限公司出版。
The chemical changes of dissolved organic matter (DOM) extracted from the biosolids during 100-days composting were assessed by the means of UV-visible spectra combined gel permeation chromatography (GPC), Fourier transform infrared (FTIR) spectroscopy and excitation-emission matrix (EEM) fluorescence spectra. Pumice was used as the inorganic bulking agent to eliminate the influences of conventional organic materials on the analysis result of the biosolid samples. The results showed that the DOC/DTN (1.97-0.83) of the biosolid extract was distinctly lower than the C/N (6.88-7.84) of the biosolid sample; both low DOC/DTN ratio and poor biodegradability of the DOM had the important relation with the nitrogen loss in the biosolid composting process. After 100-days composting, SUVA(254) and SUVA(280) of the aqueous extract were 17.6 and 18.6 times higher than that of the raw biosolid, respectively. Both of them were proved to be the effective indices to evaluate the stability degree of the biosolid. Spectral analysis of the DOM represented significant decline of aromatic proteins, clear rising of humic acid-like organics and slight increase of fulvic acid-like materials during the active phase of composting. The formation of the larger molecules with an amount of carboxylic and aromatic structures was observed in the curing phase. (C) 2013 Published by Elsevier Ltd.