Heterogeneity Influence of Organic Matter on the Ozonation Chemiluminescence for Soils and Sediments

Abstract:

Organic matter in soils and sediments is the key object of biogeochemistry in both terrestrial and marine ecosystems. Whether organic matter is the source or sink of carbon and nutrients can be predicted by its compositions and need continuous, long-term observations of organic matter compositions; therefore, in situ technologies are being investigated to meet the continuous, long-term observations. This study tried to explore a rapid determination of organic matter compositions by ozone chemiluminescence. After the soils or sediments were oxidized by ozone, their chemiluminescence characteristics such as luminescence maximum and time differed significantly. We hypothesized that the luminescence characteristics is controlled by the organic matter compositions. The soils and sediments were separated into extractives, acid soluble fractions (AS), and acid insoluble fractions (AIF), and then the original samples and their compositions were oxidized by ozone. Different organic matter compositions play a different role in the luminescence characteristics: extractives inhibited the luminescence maximum and luminescence time, AS increased the luminescence time and AIF increased the luminescence maximum. Results also showed that AIF can explain most variation of luminescence characteristics, suggesting that the luminescence characteristics are mainly controlled by the concentrations of AIF. Our study suggested that ozonaiton chemiluminescence have a strong potential to rapidly determine the chemistry of soils and sediments.

• Periodical: Advanced Materials Research (Volumes 468-471)
• Pages: 1850-1855
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.468-471.1850
• Online since: February 2012
• Authors: Meng De Liu, Ping Ping Fan, Liu Yan, Li Bin Du, Guang Li Hou, Qian Wang, Bin Zhao, Na Zhao
• Keywords: Cellulose, Lignin, Lipid, Organic Matter Fractions

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