Adsorption kinetic characteristics of molybdenum in yellow-brown soil in response to pH and phosphate

Nie Zhaojun; Li Jinfeng; Liu Haiyang; Liu Shiliang; Wang Daichang; Zhao Peng; Liu Hongen

doi:10.1515/chem-2020-0501

Open Chemistry (Jun 2020)

Adsorption kinetic characteristics of molybdenum in yellow-brown soil in response to pH and phosphate

Nie Zhaojun,
Li Jinfeng,
Liu Haiyang,
Liu Shiliang,
Wang Daichang,
Zhao Peng,
Liu Hongen

Affiliations

Nie Zhaojun: Department of Resources and Environment, Resources and Environment College, Henan Agricultural University, No. 95 Wenhua Road, Jinshui District, Zhengzhou, Henan Province 450002, P. R. China
Li Jinfeng: Department of Resources and Environment, Resources and Environment College, Henan Agricultural University, No. 95 Wenhua Road, Jinshui District, Zhengzhou, Henan Province 450002, P. R. China
Liu Haiyang: Department of Resources and Environment, Resources and Environment College, Henan Agricultural University, No. 95 Wenhua Road, Jinshui District, Zhengzhou, Henan Province 450002, P. R. China
Liu Shiliang: Department of Resources and Environment, Resources and Environment College, Henan Agricultural University, No. 95 Wenhua Road, Jinshui District, Zhengzhou, Henan Province 450002, P. R. China
Wang Daichang: Department of Resources and Environment, Resources and Environment College, Henan Agricultural University, No. 95 Wenhua Road, Jinshui District, Zhengzhou, Henan Province 450002, P. R. China
Zhao Peng: Department of Resources and Environment, Resources and Environment College, Henan Agricultural University, No. 95 Wenhua Road, Jinshui District, Zhengzhou, Henan Province 450002, P. R. China
Liu Hongen: Department of Resources and Environment, Resources and Environment College, Henan Agricultural University, No. 95 Wenhua Road, Jinshui District, Zhengzhou, Henan Province 450002, P. R. China

DOI: https://doi.org/10.1515/chem-2020-0501
Journal volume & issue: Vol. 18, no. 1
pp. 663 – 668

Abstract

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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.

Published in Open Chemistry

ISSN: 2391-5420 (Online)
Publisher: De Gruyter
Country of publisher: Poland
LCC subjects: Science: Chemistry
Website: https://www.degruyter.com/journal/key/CHEM/html

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