Characterization of isolated fractions of dissolved organic matter derived from municipal solid waste compost
| Autor: | Minda Yu, Hui Zhang, Chao Yang, Beidou Xi, Dan Li, Yuefeng Wang, Xiao-Song He, Jiaomei Liu |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
chemistry.chemical_classification
021110 strategic defence & security studies Environmental Engineering Chromatography Compost fungi Size-exclusion chromatography 0211 other engineering and technologies Fraction (chemistry) 02 engineering and technology 010501 environmental sciences Biodegradation engineering.material complex mixtures 01 natural sciences Pollution Humus chemistry Dissolved organic carbon engineering Environmental Chemistry Humic acid Organic matter Waste Management and Disposal 0105 earth and related environmental sciences |
| Zdroj: | The Science of the total environment. 635 |
| ISSN: | 1879-1026 |
| Popis: | Understanding the heterogeneous evolution characteristics of dissolved organic matter fractions derived from compost is crucial to exploring the composting biodegradation process and the possible applications of compost products. Herein, two-dimensional correlation spectroscopy integrated with reversed-phase high performance liquid chromatography and size exclusion chromatography were utilized to obtain the molecular weight (MW) and polarity evolution characteristics of humic acid (HA), fulvic acid (FA), and the hydrophilic (HyI) fractions during composting. The high-MW humic substances and building blocks in the HA fraction degraded faster during composting than polymers, proteins, and organic colloids. Similarly, the low MW acid FA factions transformed faster than the low weight neutral fractions, followed by building blocks, and finally polymers, proteins, and organic colloids. The evolutions of HyI fractions during composting occurred first for building blocks, followed by low MW acids, and finally low weight neutrals. With the progress of composting, the hydrophobic properties of the HA and FA fractions were enhanced. The degradation/humification process of the hydrophilic and transphilic components was faster than that of the hydrophobic component. Compared with the FA and HyI fractions, the HA fraction exhibited a higher MW and increased hydrophobicity. |
| Databáze: | OpenAIRE |
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