Toluene sorption behavior on soil organic matter and its composition using three typical soils in China
| Autor: | Guan-lin Guo, Fasheng Li, Qingbao Gu, Hui Zhang, Chunmei Han, Yan Li |
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| Rok vydání: | 2012 |
| Předmět: |
Global and Planetary Change
Soil test Soil organic matter Soil Science Geology Sorption Fraction (chemistry) Pollution Toluene chemistry.chemical_compound chemistry Environmental chemistry Soil water Environmental Chemistry Composition (visual arts) Clay minerals Earth-Surface Processes Water Science and Technology |
| Zdroj: | Environmental Earth Sciences. 68:741-747 |
| ISSN: | 1866-6299 1866-6280 |
| Popis: | The effect of soil organic matter (SOM) content and composition on sorption behavior of toluene for fluvo-aquic, red and black soils in China was investigated in batch experiments. Tested SOM was fractionated into two primary sorptive domains (‘soft’ and ‘hard’) to explain the dependence of sorption behavior on SOM composition. All the tested soils exhibited similar sorption kinetics and nonlinear sorption isotherms. Soils with high SOM content possessed a high sorptive capacity. Clay minerals also contributed to the sorptive capacity, especially for fluvo-aquic and red soils with low SOM content. In comparison, after removing most ‘soft’ SOM fraction from soils through hydrogen peroxide treatment, the residual ‘hard’ SOM fraction of three soil samples exhibited a slower sorption rate and a less sorption capacity compared to the untreated soil samples. The nonlinear degree of sorption was positively correlated with the content of ‘hard’ SOM for all soil samples. This is explained by the combined effect of SOM content and the composition on toluene sorption rates, sorption capacity and nonlinear degree of sorption of three typical soils in China. |
| Databáze: | OpenAIRE |
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