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| A Comparison of Desorption Behaviors of Sb in Different Soils |
| Received:March 03, 2015 |
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| KeyWord:antimony;soil;desorption;kinetics |
| Author Name | Affiliation | | MA Xiang-ai | College of Resources and Environmental Science, Shanxi Agricultural University, Taigu 030801, Shanxi, China | | QIN Jun-mei | College of Resources and Environmental Science, Shanxi Agricultural University, Taigu 030801, Shanxi, China | | ZHANG Ya-ni | College of Resources and Environmental Science, Shanxi Agricultural University, Taigu 030801, Shanxi, China |
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| Abstract: |
| The bioavailability and movement of antimony(Sb) in soils is dependent on its desorption behaviors. In the present study, desorption of Sb in three different soils were comparatively investigated. Results indicated that desorption of Sb in three soils was very rapid, and finished 95% of the maximum desorption within the first 30 min. However, the desorption percentages of adsorbed Sb were relatively low, accounting for 19.1%, 20.6%, and 23.2% of total adsorption in chernozem soil, krasnozem soil, and cinnamon soil, respectively. The desorption rates of adsorbed Sb increased with increases in initial Sb concentrations, but decreased as desorption amount and time increased in these three soils. The desorption kinetics of Sb could be well described by the Elovich equation for chernozem soil and krasnozem soil, while fit the two constant equation for cinnamon soil. These results provide valuable information for environmental fates and risks of Sb in soils. |
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