PAD树脂:一种智能吸收剂,用于解决Cr(VI) 污染,具有实时反和高效率
Yuanhao Wang1, Guihong Lan1, Haiyan Qiu1
1College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, China.
Journal of hazardous materials
|November 28, 2024
概括
一种新的Poly ((acrylamide-co-methacryloyloxyethyl trimethylammonium chloride) (PAD) 树脂可以有效地从水中去除有毒的六价 (Cr ((VI)). 这种创新的吸附剂提供视觉实时监控,并在再生后保持高容量.
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:
- 六价 (Cr(VI)) 对水生生态系统和人类健康构成重大威胁.
- 传统的Cr6去除方法经常面临效率,成本和监控方面的挑战.
- 需要具有集成感应能力的先进吸附剂,以有效地治理水.
研究的目的:
- 为了合成和表征一种新的聚烯胺-co-methacryloyloxyethyl trimethylammonium chloride (PAD) 树脂,用于去除CrVI.
- 研究PAD对Cr的吸附性能,动力学和热力学.
- 评估PAD作为在模拟废水中的Cr (VI) 的视觉实时感应吸收剂的可行性.
主要方法:
- 使用水性聚合来合成PAD树脂.
- 进行了批量吸附实验,以确定吸附能力和动力学.
- 进行了朗格穆尔等温,伪第一阶动力学和热力学分析.
- 使用模拟废水进行了柱体吸附研究,随后进行了再生循环.
主要成果:
- 根据兰迈尔模型和伪第一阶动力学,PAD树脂在pH值为4.78和15°C时具有135.32 mg/g的最大Cr (VI) 吸附能力.
- 树脂在Cr (VI) 吸附时显示了从透明到黄色的视觉颜色变化,使实时监测成为可能.
- 在模拟的湖水中,PAD实现了99.54%的Cr (VI) 去除,将度降低到0.022 mg/L.
- 在使用HCl.Cl的四个再生周期后,吸附剂保持了93.68%的容量.
结论:
- PAD树脂是一种高效和智能吸附剂,用于从污染水中去除Cr (VI).
- 集成的色度测量传感机制为过程监控和优化提供了显著的优势.
- 树脂的可重复使用性和高性能使其成为成本效益和可持续的Cr6修复解决方案.
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