Adsorption kinetic characteristics of molybdenum in yellow-brown soil in response to pH and phosphate
| Autor: | Nie Zhaojun, Li Jinfeng, Liu Haiyang, Liu Shiliang, Wang Daichang, Zhao Peng, Liu Hongen |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | Open Chemistry, Vol 18, Iss 1, Pp 663-668 (2020) |
| Druh dokumentu: | article |
| ISSN: | 2391-5420 2020-0501 |
| DOI: | 10.1515/chem-2020-0501 |
| Popis: | Molybdenum (Mo) adsorption by acidic yellow-brown soil was investigated as a function of a pH (1–13) and the equilibrium of P solution (0, 3.1, and 31 mg L−1) concentration. Mo adsorption by acidic yellow-brown soil increased within the pH range from 1 to 4. Above pH 4, Mo adsorption decreases with an increase in pH. The maximum adsorption was found between pH 2 and 4. Competitive adsorption experiments showed that the equilibrium sorption data fitted into Langmuir and Freundlich isotherms. The sorption data of Mo on the acidic yellow-brown soil fitted well with the Langmuir isotherm model due to the higher R2 value. A reduction in Mo adsorption by the acidic yellow-brown soil was noticed at higher addition levels of P (3.1 and 31 mg L−1). Therefore, P increasing the bioavailability of Mo and enhancing Mo uptake by plants might be related to the inhibition of Mo absorption by the acidic yellow-brown soil. |
| Databáze: | Directory of Open Access Journals |
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