通过树脂聚合物对电离子Pb金属吸附进行实验研究的优化
Jaouad Bensalah1,2, Ghizlane Doumane3, Oumayma Iraqi3
1Laboratory of Materials Advanced and Engineering Process, Department of Chemistry, Faculty of Sciences, University Ibn Tofaïl, B.P. 133, 14000, Kenitra, Morocco. Jaouad.bensalah@uit.ac.ma.
Scientific reports
|November 17, 2023
概括
这项研究表明,一种新型的阴阳树脂有效地从废水中去除 (Pb) 离子. 吸附剂在各种条件下显示出高效率,为重金属整治提供了一个有前途的解决方案.
科学领域:
- 环境化学环境化学
- 材料科学 材料科学 材料科学
- 吸附科学 吸附科学
背景情况:
- 重金属污染,特别是 (Pb) 离子,对环境和健康构成重大风险.
- 从工业废水中有效去除离子对于环境保护至关重要.
研究的目的:
- 开发和描述一种用于从水溶液中去除离子的新型阴离子树脂.
- 调查吸附机制,并优化参数,以有效地去除.
主要方法:
- 使用GTA/GTD,SEM和EDX进行阴阳树脂的表征.
- 吸附实验进行了不同的pH值,初始度,吸附剂剂量和温度.
- 动力学和同热学研究使用了伪第一阶,伪第二阶,粒子内部扩散,兰木尔,弗洛因德利希和特姆金模型.
- 进行了热力学分析,以确定吸附过程的自发性和性质.
主要成果:
- 阴离子树脂表现出高的离子去除效率,在1.0g的吸附剂剂剂量下达到100%.
- 吸附能力受到pH值的显著影响,在pH值8.0 (84.78%) 时的最佳去除.
- 兰穆尔异热模型最好地描述了吸附过程 (R2 = 0.999),最大吸附能力为11.23 mg g-1.1.
- 动力学研究表明,快速吸附过程与伪二阶模型相一致.
- 热力学分析显示了自发和内热吸附过程 (ΔG° < 0, ΔH° > 0).
结论:
- 开发的酸树脂是一种高效的吸附剂,可以从废水中去除离子.
- 吸附过程是自发的,内热的,并且由兰格穆尔模型描述得很好.
- 分子动力学计算突出了氨基基团在离子吸附中的关键作用,这表明了更广泛的重金属修复应用的潜力.
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