Characterization of Dissolved Organic Matter Derived from Rice Straw at Different Decay Stages
This study characterized chemical and structural properties of dissolved organic matter (DOM) derived from different stages of rice straw decay under laboratory conditions. Ten different DOM samples were obtained and characterized using element composition analysis, Fourier-transform infrared spectroscopy, and 1H, 13C-nuclear magnetic resonance spectroscopy. The results showed that at the early stage of straw decay, lowweight-molecular components were dominant, such as carbohydrates, amino acids, and amino sugars. At the second stage, the contents of mono-, oligo-, and polysaccharides increased. At the later stage, aromatic products were dominant because of their strong recalcitrance for microorganisms. As straw decay proceeded, some small molecular chemicals (such as carbohydrates and acid amides) polymerized around the aromatic rings, suggesting that the DOM became more stable with decay time.
Dissolved organic carbon Fourier-transform infrared spectroscopy 1H,13C-nuclear magnetic resonance spectroscopy
Hualin Chen Jiangmin Zhou
School of Life and Environmental Sciences,Wenzhou University,Wenzhou 325027,Zhejiang,China
国际会议
杭州
英文
35-37
2009-10-10（万方平台首次上网日期，不代表论文的发表时间）