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为高效去除透析液中积累的毒素，采用共沉淀法分别制备天冬氨酸(Asp)、谷氨酸(Glu)、苯丙氨酸(Phe)插层的层状双金属氢氧化物(LDH)，并考察其对马尿酸(HA)的吸附性能。结果表明，Phe-LDH性能最优，吸附量达196.8 mg/g。在此基础上，使用冷冻干燥法制备XG/Phe-LDH复合气凝胶(XG/PL)。优化后的复合气凝胶对HA的最大吸附量为149 mg/g，吸附行为符合Langmuir等温模型和准二级动力学模型，表现为单层均相化学吸附。机理分析证实，XG/PL的高效吸附能力主要归因于Phe-LDH的层间离子置换机制。
Abstract：To efficiently remove accumulated toxins in dialysate, layered double hydroxides(LDHs) intercalated with aspartic acid(Asp), glutamic acid(Glu), and phenylalanine(Phe) were prepared by coprecipitation method, and their adsorption performance for hippuric acid(HA) was investigated. The results showed that Phe-LDH exhibited the optimal performance with an adsorption capacity of 196.8 mg/g. Based on this, XG/Phe-LDH composite aerogel(XG/PL) was fabricated by freeze-drying method. The optimized composite aerogel exhibited a maximum adsorption capacity of 149 mg/g for HA, and the adsorption behavior followed the Langmuir isotherm model and pseudo-second-order kinetic model, indicating monolayer homogeneous chemisorption. Analysis confirmed that the interlayer ion exchange mechanism of Phe-LDH contributed to the efficient adsorption capacity of XG/PL.
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基本信息:
DOI：10.16026/j.cnki.iea.2026040251
中图分类号:TQ427.26;O647.3;R692
引用信息:
[1]安博帆,王雪芬.黄原胶/苯丙氨酸插层LDH复合气凝胶的制备及其对马尿酸吸附性能的研究[J].离子交换与吸附,2026,42(04):251-259.DOI:10.16026/j.cnki.iea.2026040251.
基金信息:
上海市自然科学基金（项目号22ZR1402100）; 国家重点研发计划（项目号2022YFB3804901,2022YFB3804900）
2026-08-20
2026-08-20