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使用颗粒状活性炭改性聚乙烯甘醇从废水中去除有机污染物:特征,动力学和异热研究

Leila Choopani¹, Mohammad Mehdi Salehi¹, Hossein Mashhadimoslem²

¹Catalysts and Organic Synthesis Research Laboratory, Department of Chemistry, Iran University of Science and Technology, Tehran, Iran.

|July 10, 2024

概括

一种新型的颗粒活性炭,经过Polyethylene glycol 600修改,可以有效地从水中去除Diazinon,Amoxicillin和Crystal Violet. 这种吸附剂显示出高容量和可重复使用性,用于净水应用.

科学领域:

环境化学环境化学
材料科学材料科学材料科学
水处理处理水的方法

背景情况:

由于Diazinon,Amoxicillin和Crystal Violet的水污染造成了严重的环境风险.
传统的水处理方法难以有效地去除这些多样化的污染物.
新型吸附剂的开发对于污染水体的有效修复至关重要.

研究的目的:

为了合成和表征一种新型的颗粒活性炭 (GAC) 用聚乙烯甘醇600 (PEG) 改性.
评估GAC-PEG复合物的吸附效率,以从水溶液中去除Diazinon (DZ),阿莫西西林 (AMX) 和水晶紫 (CV).
研究开发的吸附剂的吸附机制和可回收性.

主要方法:

使用PEG对GAC进行修改,并使用FT-IR,XRD,FESEM和N2吸附/脱附进行表征.
在不同的pH值,吸附剂剂量,初始度和反应时间下进行的吸附实验.
使用兰迈尔和伪二阶模型进行吸附异温和运动研究.

主要成果:

GAC-PEG吸附剂显示出高吸附能力:DZ的吸附量为1163.933毫克g-1,AMX的吸附量为1163.100毫克g-1,CV的吸附量为1150.300毫克g-1.
吸附遵循兰格穆尔等温和和伪二次运动模型,表明化学吸附和单层覆盖.
吸附剂表现出高效的分离,并在两个再生周期中保持高吸附效率.

结论:

新型GAC-PEG复合物是一种高效的吸附剂,可以从水中去除DZ,AMX和CV.
吸附机制涉及多种相互作用,包括静电力,π-π相互作用,键和捕获.
吸附剂的可重复使用性和高效分离性使其成为实际水处理应用的有希望的材料.

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