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| Migration and transformation of vanadium in cultivated soil with phosphate fertilizer |
| Received:August 21, 2018 |
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| KeyWord:cultivated soil;superphosphate;vanadium;migration and transformation |
| Author Name | Affiliation | E-mail | | YANG Jie | College of Water Science, Beijing Normal University, Beijing 100875, China | | | XIE Lin | College of Water Science, Beijing Normal University, Beijing 100875, China | | | SI Ao-nan | College of Water Science, Beijing Normal University, Beijing 100875, China | san012vickie@sina.com | | QU Pan | Sichuan Zhong Huan-Lianrong Environmental Protection Engineering Co. Ltd, Chengdu 610213, China | | | TENG Yan-guo | College of Water Science, Beijing Normal University, Beijing 100875, China
Engineering Research Center of Groundwater Pollution Control and Remediation of Ministry of Education, Beijing 100875, China | |
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| Abstract: |
| To explore the effects of phosphate fertilizers on the migration and accumulation of vanadium (V) in cultivated soil, the leaching process of soil with superphosphate was simulated through an indoor soil column. Moreover, the migration and transformation characteristics of V in soil before and after fertilization and its influencing factors were discussed. V in the leachate mainly existed in the dissolved form (50.8%~90.4%), and the colloidal adsorption content state was low. The pH value of the soil directly affected the transformation of V in the soil. Acid leaching liquor promoted the oxidation of partial V (Ⅳ) to V (Ⅴ) in the lower soil layer, and promoted the transformation of V from the residual form to the weak acid extractive and reducible form. Our results indicated that both the leaching of acid liquor and the application of phosphate fertilizer promoted the release of V and increased the bioavailability of V in the soil. Within a certain range of leaching, the lower the pH value of the leaching liquor, the smaller the release of V in the soil. However, the overall release of V was relatively low and the migratory aptitude was weak. There was a significant linear correlation between V (Ⅴ) and the bioavailable fraction of V. The content of V (Ⅴ) could be used as an evaluation index of the potential hazards of V in soil. |
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