期刊
OPEN CHEMISTRY
卷 18, 期 1, 页码 663-668出版社
DE GRUYTER POLAND SP Z O O
DOI: 10.1515/chem-2020-0501
关键词
molybdenum; adsorption; pH; phosphate; acidic yellow-brown soil
资金
- National Natural Science Foundation of China [41201286, 41501311, 41271471]
- Basic Research Project of Henan Provincial Department of Education [19zx007]
- Young Core Instructor Funding Scheme of Henan Province [2013-045]
- Key Project of Science and Technology Research of Henan Province Education Department [12A210015]
- Scientific and Technological Key Projects of Henan Province [172102110060]
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 R-2 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 bioavail-ability of Mo and enhancing Mo uptake by plants might be related to the inhibition of Mo absorption by the acidic yellow-brown soil.
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