文献类型： 中文期刊
作者： 颜 澳 李莲芳* 周 雪 康梦琦 叶 婧
作者机构：
关键词： LDH;; 生物炭;; 磷酸盐;; 吸附;; 水污染;; 机理
期刊名称：中国农业大学学报
ISSN： 1007-4333
年卷期： 2025 年
页码：
收录情况： 北大核心（2023版） ; ; CSCD（2025-2026年度） ; ; 科技核心（2024版） ; ; 农林核心（2024版）
摘要： 针对我国水体污染“磷”超标及其污染治理困难的问题，采用典型农林废弃物-竹屑为原料，以铁氧化物为 前驱体，并与层状双金属氢氧化物（Layered double hydroxide，LDH）复合负载，利用水热法制备了一种新型 LDH 基 磁性生物炭复合材料（Ferrite-LDH modified biochar composite，FLBC），并通过批量平衡试验及 SEM-EDS、XPS 等 技术，探究其对磷酸盐吸附性能及实际污染水体磷的去除效果与机制。结果表明：吸附动力学试验显示 FLBC 在 240 min 内 可 达 吸 附 平 衡 ，最 大 吸 附 容 量 达 93. 92 mg/g，吸 附 容 量 是 未 改 性 生 物 炭 的 3. 7 倍 ；吸 附 过 程 符 合 Langmuir 等温模型和准二级动力学模型，表现为单层化学吸附特征；材料经 3 次吸附–解吸循环后，吸附容量依然 保持 56. 8% 的去除能力，显示出良好的稳定性与可重复使用性。此外，XPS 等技术分析的结果表明 FLBC 对磷的 吸附行为主要与金属配位、络合沉淀、静电吸附及离子交换等多重机制有关。最后，将 FLBC 应用于北京市典型地 表水体官厅水库等的磷污染水样中，相应的磷去除率高达 85. 7%，水质明显改善，证实了 FLBC 在水体磷污染治理 中具有良好的应用潜力与前景。
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