氨基乙醇支持的二甲纤维素可有效和选择性地从水溶液中去除Hg (II)
Aya G Mostafa1, Eslam A Gaith1, Magda A Akl2
1Department of Chemistry, Faculty of Science, Mansoura University, Mansoura, 35516, Egypt.
Scientific reports
|November 9, 2023
概括
一种新的复合材料,DAC@CAH@SK2,有效地从水中去除 (Hg2+). 这种吸附剂具有很高的容量和选择性,为控制污染提供了一个有前途的解决方案.
科学领域:
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
- 分析化学 分析化学
背景情况:
- 污染对环境和健康构成重大风险.
- 开发高效的吸附剂材料对于整治至关重要.
- 现有的方法需要先进的材料来有效捕获.
研究的目的:
- 为了合成和表征一种新型复合吸附剂,DAC@CAH@SK2.
- 评估DAC@CAH@SK2对离子 (Hg2+) 的吸附能力和效率.
- 在实际应用中研究吸附剂的再生和选择性.
主要方法:
- 通过使用二甲基纤维素,乙化和二硫化碳,三步合成DAC@CAH@SK2.
- 使用TGA,BET,SEM,FTIR,XRD,1HNMR和EDS进行全面的材料表征.
- 批量吸附实验以确定最佳条件和吸附动力学,适用于兰迈尔和伪二阶模型.
主要成果:
- 在最佳条件下 (pH 5-8,150 mg/L Hg2+,0.01 g剂量,180分钟),DAC@CAH@SK2复合物具有139.6 mg/g的Hg2+最大吸附能力.
- 吸附过程是自发的,外热的,随后是单层化学吸附,并且对Hg2+具有很高的选择性.
- 该材料从合成和真实废水中实现了>95%的Hg2+去除,并成功再生.
结论:
- DAC@CAH@SK2是一种高效和选择性的吸附剂,用于去除.
- N和S原子与Hg (II) 的协同复合是其高吸附能力的关键.
- 该材料显示出从受污染的水源中实践整治的巨大潜力.
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