Abstract 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 bioavailability of Mo and enhancing Mo uptake by plants might be related to the inhibition of Mo absorption by the acidic yellow-brown soil.

中文翻译：

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黄棕色土壤中钼对pH和磷酸盐的吸附动力学特征

摘要 研究了酸性黄褐色土壤对钼 (Mo) 的吸附与 pH (1-13) 和 P 溶液（0、3.1 和 31 mg L-1）浓度平衡的函数关系。酸性黄褐色土壤对钼的吸附在pH 1-4 范围内增加。在pH 4 以上，钼吸附随着pH 的增加而减少。在 pH 2 和 4 之间发现最大吸附。竞争吸附实验表明，平衡吸附数据符合 Langmuir 和 Freundlich 等温线。由于R 2 值较高，Mo在酸性黄褐色土壤上的吸附数据符合Langmuir等温线模型。在较高的磷添加水平（3.1 和 31 mg L-1）下，酸性黄褐色土壤对钼的吸附减少。所以，