有效的 (VI) 去除使用三甲基盐酸盐作为载体在聚合物包容膜中的载体
Karima Cheballah1, Lynda Mitiche1, Clàudia Fontàs2
1Laboratoire de Physique Et Chimie Des Matériaux (LPCM), Université Mouloud Mammeri, Route de Hasnaoua, 15000, Tizi-Ouzou, Algeria.
Environmental science and pollution research international
|August 27, 2024
概括
这项研究开发了一种新型的聚合物纳入膜 (PIM),使用三甲基盐酸盐 (TOMAS) 进行有效的六价 (Cr(VI)) 清除. 优化的PIM从复杂的解决方案中实现了高选择性和Cr (VI) 的回收率.
科学领域:
- 环境化学环境化学
- 材料科学 材料科学 材料科学
- 分离科学 分离科学
背景情况:
- 六价 (Cr(VI)) 对环境和健康构成重大风险.
- 传统的Cr6去除方法经常面临效率和选择性方面的挑战.
- 聚合物纳入膜 (PIM) 为选择性离子传输提供了一个有前途的替代方案.
研究的目的:
- 准备和描述一种新的离子液体 (IL) 三甲基盐酸盐 (TOMAS).
- 将TOMAS纳入基于纤维素三酸盐 (CTA) 的PIM中,用于Cr6的去除.
- 优化PIM组合和实验条件,以实现高效的Cr6运输.
主要方法:
- 托马斯离子液的制备和表征.
- 制造基于CTA的PIM,其TOMAS度不同.
- 优化PIM成分 (CTA:TOMAS比率,可塑剂的存在).
- 研究料阶段 (pH,初始Cr度) 和接收溶液 (NaOH度) 的影响.
- 在有竞争性金属离子的情况下评估Cr (VI) 运输.
- 评估膜的稳定性和可重复使用性.
主要成果:
- 确定了50%CTA和50%TOMAS (质量%) 没有增塑剂的最佳PIM成分.
- 从酸性料溶液 (pH2) 到基本的接收溶液 (0.1 M NaOH) 实现了高效的CrVI运输.
- 该PIM显示出对Cr(VI的高选择性,不受其他金属离子 (Cr(III),Cd(II),Zn(II),Cu(II),Ni(II) 的存在的影响.
- 在24小时后,Cr (VI) 的选择性恢复率为93.61%.
- 膜表现出良好的稳定性,在重复使用5天后,效率略有下降.
结论:
- 开发的基于TOMAS的PIM是高度有效和选择性的Cr (VI) 去除.
- 该PIM显示了废水处理中的实际应用潜力.
- 需要进一步研究长期稳定性和可扩展性.
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