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使用酸修饰的活性碳纤维从水溶液中有效封存离子

Muruganantham Rethinasabapathy¹, Seung-Kyu Hwang¹, Jong-Soo Choi²

¹NanoBio High-Tech Materials Research Center, Department of Biological Sciences and Bioengineering, Inha University, 100 Inha-ro, Incheon, 22212, Republic of Korea.

|August 10, 2024

概括

用三聚酸 (Na5P3O10) 对活性碳纤维 (ACF) 的酸化产生了ACF-P3,它是有效的离子 (Cs+) 吸附剂. 与其他改性ACF材料相比,ACF-P3显示出更高的Cs+吸附能力和去除效率.

科学领域:

材料科学材料科学材料科学
环境化学环境化学
吸附科学吸附科学

背景情况:

活性碳纤维 (ACF) 是广泛使用的吸附剂,但它们对离子 (Cs+) 等特定污染物的效率可能是有限的.
对ACF的表面修改可以增强其对目标污染物的吸附特性.
酸化是一种潜在的方法,可以引入改善Cs+吸附的功能群.

研究的目的:

为了合成和评估用不同的离子去除离子 (Cs+) 功能化的酸修饰活性碳纤维 (ACF-Ps).
为了研究这些改性吸附剂的吸附能力和效率.
为了确定在ACF上增强Cs+吸附的最佳酸化剂.

主要方法:

使用三酸 (Na3PO4),二酸 (Na2H2P2O5) 和三酸 (Na5P3O10) 酸化活性碳纤维 (ACF),分别生成ACF-P1,ACF-P2和ACF-P3.
合成的吸附剂被测试了它们从水溶液中去除Cs+的能力.
吸附等温 (Langmuir) 和动力模型 (伪二阶) 被应用来分析吸附机制.

主要成果:

用Na5P3O10修改的ACF-P3在25°C和pH7.0下表现出最高的Cs+吸附能力 (37.59mgg-1) 和去除效率 (82.90%) .
ACF-P3的Cs+吸附能力和去除效率明显高于ACF-P1,ACF-P2和未修改的ACF.
吸附数据符合兰格穆尔等温和和伪二次运动模型,表明单层吸附受化学吸附控制.

结论:

用Na5P3O10酸化是一种高效的方法,用于功能化ACF以增强Cs+吸附.
增强的吸附性归因于在ACF-P3.3上增加了酸盐功能群和丰富的表面氧基和氧基群的数量.
表面复合和静电相互作用在化ACF材料上的Cs+吸附机制中起着至关重要的作用.

关键词:

活性碳纤维是一种活性碳纤维.吸附方式吸附方式吸附方式是一种.在粒子内部扩散.酸是一种酸.

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