数字农科院2.0

Iron-based biochar materials for phosphorus recovery from agricultural runoff: Mechanism and potential application as a slow-release fertilizer

文献类型： 外文期刊

作者： Kai Hui;Rui He;Qianqian Tian;Xiaokai Zhou;Lu Hou;Xu Zhang;Yu Jiang;Hong Yao

作者机构：

关键词： Adsorption sites;Amorphous FeOOH;Bioavailability;Biochar;Phosphorus recovery

期刊名称： Separation and Purification Technology

ISSN： 1383-5866

年卷期： 2024 年 347 卷

页码：

收录情况： SCIE（2024版） ; ; EI（2024版）

摘要： Agricultural runoff is an important pathway leading to the loss of phosphorus (P) resources. In this study, three amorphous FeOOH biochar (AF-BC) composites with good P adsorption properties were prepared. Batch experiments showed that both the Elovich model and the Langmuir-Friedrich model were effective in describing the P adsorption by AF-BC, suggesting that the P adsorption by these three materials is a multi-mechanism adsorption process dominated by chemical process. Among them, S-AF exhibited the best adsorption performance with an expected maximum adsorption capacity of 276.40 mg/g. This superior performance can be attributed to S-AF having a larger surface area and a higher concentration of basic groups. Plant culture tests have shown this composite to be effective in promoting seed germination and growth, so it can be used to sequester P lost from agricultural runoff and as a slow-release P fertilizer to improve the soil.

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