分析化学2017，Vol.45Issue(4)：579-586,8.DOI:10.11895/j.issn.0253-3820.160752
堆肥过程不同分子量水溶性有机物电子转移能力的演变及影响因素
Effect of Compositional and Structural Evolution of Size-fractionated Dissolved Organic Matter on Electron Transfer Capacity during Composting
摘要
Abstract
Ultrafiltration technology and spectrum technology were used to study the compositional and structural evolution of size-fractionated dissolved organic matter (DOM) during chicken manure composting. Electrochemical method was used to measure electron transfer capacity. The results showed that most of protein-like components were exist in DOM (MW<1 kDa) and it was the main components in DOM (MW<1 kDa) during initial composting. The protein-like components were persistently degraded and the humic-like components were persistently generated during composting process. The protein-like components didn′t exist in DOM (MW<1 kDa) and the fulvic-like components were the main components in the end of composting process. The humic-like substances were the main fluoresence components of DOM (MW=1-3 kDa, MW=3-5 kDa, MW>5 kDa). Though the changes of humic-like components with different molecular weight of DOM were different during composting, the content of humic-like components in the end of composting process was higher than that in the initial composting process. The electron donating capacity was persistently reducing and electron accepting capacity was persistently increasing for DOM with MW<1 kDa in the process of composting. In contrast, for the DOM with MW>1 kDa, the electron donating capacity was persistently increasing and the electron accepting capacity was irregular in the process of composting process. Meanwhile, the change of electron transfer capacity was irregular for DOM with MW = 1-3 kDa and MW=3-5 kDa. In a word, EAC of compost-derived DOM with size-fractionation was controlled by the aromatic carbon content which was derived from lignin degradation, but not related to spectrum parameter.关键词
堆肥/水溶性有机物/分子量/电子转移能力/平行因子分析Key words
Composting/Dissolved organic matter/Molecular weight/Electron transfer capacity/Parallel factor analysis引用本文复制引用
杨超,何小松,高如泰,席北斗,黄彩红,张慧,檀文炳,李丹..堆肥过程不同分子量水溶性有机物电子转移能力的演变及影响因素[J].分析化学,2017,45(4):579-586,8.基金项目
本文系国家杰出青年基金(No.51325804)和国家自然科学基金(No.51508540)资助 （No.51325804）
This work was supported by the China National Funds for Distinguished Young Scientists (No.51325804) and the National Natural Science Foundation of China (No.51508540) （No.51325804）
