title: Characterization of organic matter of plants from lakes by thermal analysis in a N2 atmosphere.
abstract: Organic matter (OM) has been characterized using thermal analysis in O2 atmospheres, but it is not clear if OM can be characterized using slow thermal degradation in N2 atmospheres (STDN). This article presents a new method to estimate the behavior of OM in anaerobic environment. Seventeen different plants from Tai Lake (Ch: Taihu), China were heated to 600 °C at a rate of 10 °C min(-1) in a N2 atmosphere and characterized by use of differential scanning calorimetry (DSC) and thermal gravimetric analysis (TGA). DSC chromatograms were compared with 9 standard compounds. Seven peaks were observed in DSC chromatograms, 2 main peaks strongly correlated with biochemical indices, and one main peak was a transitional stage. Energy absorbed by a peak at approximately 200 °C and total organic carbon were well correlated, while energy absorbed at approximately 460 °C was negatively correlated with lignin content. Presence of peaks at approximately 350 and 420 °C varied among plant biomass sources, providing potential evidence for biomass identification. Methods of STDN reported here were rapid and accurate ways to quantitatively characterize OM, which may provide useful information for understanding anaerobic behaviors of natural organic matters.
authors.affiliation: Department of Chemistry, University of Science and Technology of China, Hefei, Anhui, China.|State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
authors.forename: Fei
authors.initials: F
authors.lastname: Guo
authors.affiliation: State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
authors.forename: Fengchang
authors.initials: F
authors.lastname: Wu
authors.affiliation: State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
authors.forename: Yunsong
authors.initials: Y
authors.lastname: Mu
authors.affiliation: State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Hu
authors.affiliation: State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
authors.forename: Xiaoli
authors.initials: X
authors.lastname: Zhao
authors.affiliation: State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Meng
authors.affiliation: Department of Veterinary Biomedical Sciences and Toxicology Centre, University of Saskatchewan, Saskatoon, Saskatchewan, Canada.|Department of Zoology, and Center for Integrative Toxicology, Michigan State University, East Lansing, MI, USA.
authors.forename: John P
authors.initials: JP
authors.lastname: Giesy
authors.affiliation: Assessment Center of Environmental Engineering, Department of Environmental Protection, Beijing, 100012, China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Lin
mesh_terms: D002152:Calorimetry, Differential Scanning / Q000379:methods*; D002244:Carbon / Q000032:analysis* / Q000737:chemistry; D004785:Environmental Pollutants / Q000032:analysis*; D060106:Lakes / Q000737:chemistry*; D008031:Lignin / Q000032:analysis* / Q000737:chemistry; D009584:Nitrogen / Q000737:chemistry; D010084:Oxidation-Reduction; D010944:Plants / Q000378:metabolism*
chemical_list: D004785:Environmental Pollutants; D002244:Carbon; D008031:Lignin; D009584:Nitrogen