数字农科院2.0

Green synthesis of CaxLa1-xMnO3 with modulation of mesoporous and vacancies for efficient low concentration phosphate adsorption

文献类型： 外文期刊

作者： Feng M.;Li M.;Guo C.;Yuan M.;Zhang L.;Qiu S.;Fu W.;Zhang K.;Guo H.;Wang F.

作者机构：

关键词： A-site doping;Density functional theory;Low concentration phosphate removal;Perovskite;Wastewater

期刊名称： Journal of Environmental Management

ISSN： 0301-4797

年卷期： 2024 年 351 卷

页码：

收录情况： SCIE（2024版） ; ; EI（2024版）

摘要： Phosphate concentrations in eutrophic surface waters are usually low, and efficient removal of low concentration phosphate remains a challenge. In this study, Ca-doped LaMnO3 synthesized at doping ratios, designated as CaxLa1-xMnO3 (x = 0, 0.2, 0.4, 0.7), were compared. It was found that, the adsorption capacity of Ca0.4La0.6MnO3 material reached 63.01 mg/g at pH = 5, increased by 63.6% over the undoped LaMnO3 perovskite. For long-term adsorption, Ca0.4La0.6MnO3 could constantly adsorb phosphate to avoid phosphate accumulation (<0.05 mg/L). This proves that Ca0.4La0.6MnO3 has the ability to control dynamic water eutrophication. Characterization and density functional theory results confirmed that CaxLa1-xMnO3 can increase the content of mesopores and oxygen vacancies, providing additional active sites. This reduces the adsorption energy of the La site, promotes electron transfer, and increases its affinity. It provides a new method for removing low-concentration phosphates. © 2023 Elsevier Ltd

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