Structural study of humic acids during composting of activated sludge-green waste: Elemental analysis, FTIR and 13C NMR
Structural study of humic acids during composting of activated sludge-green waste: Elemental analysis, FTIR and 13C NMR
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DOI：
10.1016/j.jhazmat.2009.12.064
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发表时间：
2010-05-15
影响因子：
13.6
通讯作者：
Hafidi, Mohamed
中科院分区：
文献类型：
--
作者：
Amir, Soumia;Jouraiphy, Abdelmajid;Hafidi, Mohamed
从不同成熟阶段的活性污泥堆肥中提取的腐殖酸，其特征在于各种化学技术。元素分析表明，H减少，H/C和C/N比减少，N和S的比例增加。在堆肥结束时，C%和O%呈现与初始相同的值，虽然它们在中间阶段增加。基于FTIR吸光度的比率，表明最终产物富含在1384、1034和1544 cm（-1）处吸收的醚化和肽化合物。烷基和其他富氮和氧化的腐殖酸结构组成了堆肥过程中产生的新的腐殖酸聚合物。在主成分分析中，第一个轴，PC 1：49.75%考虑了分解结构之间的变异性，其他参数涉及堆肥后形成的稳定的新腐殖酸聚合物。PC 2（40.5%）在堆肥过程中表现出（芳香族碳，FA水平）与（脂肪族碳，HA水平）之间的负相关。(C)2009 Elsevier B. V.保留所有权利。
The humic acids extracted from a compost of activated sludge at different stages of maturity were characterized by various chemical techniques. Elemental analysis showed the reduction of H, and the H/C and C/N ratios and an increase in the proportion of N and S. At the end of composting C% and O% presented the same values as initially, although they increased in the intermediate stage. Based on the ratios of FTIR absorbance it was shown that the end product was enriched in etherified and peptidic compounds absorbing at 1384, 1034 and 1544 cm(-1). The alkyl and other N-rich and oxidized recalcitrant structures compose the new humic polymers produced during composting. In principal components analysis, the first axis, PC1: 49.75% considers the variability between structures in decomposition from the other parameters that concern the stable new humic polymers formed after composting. PC2 (40.5%) shows a negative correlation between (aromatic carbon, FA level) and (aliphatic carbon, HA level) during composting. (C) 2009 Elsevier B.V. All rights reserved.