和的吸附:单一和竞争性的吸附系统的建模
Amrutha Acharya1, Gautham Jeppu1, Chikmagalur Raju Girish1
1Department of Chemical Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, 576104, Karnataka, India.
Heliyon
|June 13, 2024
概括
这项研究研究了使用活性炭去除 (As(V)) 和 (F),发现它对这两种污染物都有效. 扩展的Langmuir Freundlich模型最好地描述了同时吸附,其中As(V) 显示出比F.更高的选择性.
科学领域:
- 环境科学 环境科学
- 水处理技术水处理技术
- 吸附科学 吸附科学
背景情况:
- 在全球范围内,水源中的和化物污染对人类健康构成重大风险.
- 这些污染物的同时存在使有效的水处理策略变得复杂.
研究的目的:
- 在单一和竞争性系统中研究活性炭对 (V) (As) (V) 和 (F) 的吸附.
- 模拟和理解吸附机制和异热态的行为,以有效净化水.
主要方法:
- 用活性炭进行了As(V) 和F的批量平衡吸附研究.
- 活性炭的表征使用BET,XRD,FESEM,EDS和FTIR进行.
- 应用了吸附动力学和等温建模,包括兰木尔,弗洛伊德利希,托斯,雷德利希·彼得森,修改的兰木尔·弗洛伊德利希,扩展的兰木尔,扩展的兰木尔·弗洛伊德利希,修改的竞争性兰木尔和杰普阿姆鲁塔多元组件多元组件模型.
主要成果:
- 活性炭的最大吸附能力为3.58 mg/g的As{V) 和2.32 mg/g的F.
- 伪二阶动力学最好地描述了吸附过程.
- 修改后的兰慕尔弗朗德利希模型为单元吸附提供了最佳适合,而扩展后的兰慕尔弗朗德利希模型在模拟二元吸附方面表现出色.
- ) 呈现出比F更高的吸附选择性,表明对同时存在的化物产生对抗作用.
结论:
- 活性炭是一种可行的吸附剂,可以从水中去除 (V) 和 (F).
- 扩展的兰木尔·弗朗德利希等热模型准确地预测了同时发生的As(V) 和F吸附.
- 了解竞争性吸附机制对于设计有效的共同污染水处理系统至关重要.
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