期刊
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
卷 197, 期 -, 页码 -出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.ecoenv.2020.110597
关键词
DOM; Manure biochar; Pyrolysis temperature; Two-dimensional correlation analysis; Humic acid-like; Protein-like
资金
- National Key R&D Program of China [2017YFD0200808]
- National Natural Science Foundation of China [21607002]
- Major Science and Technology Projects in Anhui Province [18030701214]
- Research Program of Outstanding Young Backbone Talents in Colleges and Universities of Anhui Province [gxgwfx2019048]
- Talent Projects of Anhui Science and Technology University
Dissolved organic matter (DOM) plays an important role in the migration and transformation of nutrients and pollutants. Recently, DOM derived from biochar has the potential to determine the application of biochar and has attracted much researcher's attention. However, the effects of pyrolysis temperature on the composition evolution of DOM in manure-derived biochar are still unclear. In this study, DOM solutions extracted from a series of biochars derived from three kinds of manure (chicken, swine and dairy) at six pyrolysis temperature (200-700 degrees C) were analyzed using UV-Visible, Fourier transform infrared and fluorescence spectroscopy, aiming to investigate the effects of pyrolysis temperature on the composition evolution of DOM. The results showed that, with the increased of pyrolysis temperature, the dissolved organic matter (DOC) content sharply declined to reach stable. High DOC content was obtained at low pyrolysis temperature. Moreover, the DOM mainly contained humic acid-like and protein-like substances. With the pyrolysis temperature increased, the protein-like substances firstly decreased and then increased, while there was an opposite trend for the humic acid-like substances. Moreover, functional groups evolution of DOM depended on the pyrolysis temperature and manure type, evidenced by the Fourier transform infrared spectroscopy with two-dimensional correlation analysis. This study highlights the importance of optical analysis and may provide valuable information regarding the characteristics evolution of biochar-derived DOM.
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