高效的阴离子/阴离子纤维素膜用于去除Cr (VI) 和Pb (II) 离子
Lu Liu1, Hongyang Ma1,2, Madani Khan2
1State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China.
Membranes
|July 28, 2023
概括
新的纤维素膜有效地从工业废水中去除有毒的Cr (VI) 和Pb (II). 这些具有成本效益的材料具有高吸附能力和低压下降,可有效净化和回收水.
科学领域:
- 材料科学 材料科学 材料科学
- 环境工程 环境工程
- 水处理技术水处理技术
背景情况:
- 工业废水通常含有有毒的重金属离子,如 (VI) 和 (II).
- 有效地去除这些污染物对于环境保护和公共卫生至关重要.
- 现有的治疗方法可能会面临效率,成本或压力下降的挑战.
研究的目的:
- 为了开发高通量,低压滴滴纤维素膜,对Cr (VI) 和Pb (II) 具有高吸附能力.
- 调查废水处理的阴离子和阴离子纤维素膜的制造和性能.
- 评估同时去除多种重金属和膜回收能力的潜力.
主要方法:
- 纤维素膜的制造是通过氧化棉织物,然后通过四级 () 或硫化 (离子) 修饰来制造纤维素膜.
- 使用ATR-FTIR,固态NMR,SEM,TGA和拉伸实验进行表征.
- 使用Cr (VI) 和Pb (II) 离子进行吸附研究 (静态和动态),包括Langmuir异热量,动力学和热力学分析.
主要成果:
- 用四等和硫酸盐组功能化的纤维素膜表现出显著的吸附能力.
- 的最大静态吸附能力为61.7 mg/g (VI) 和Pb (II) 的63.7 mg/g.
- 动态测试显示了高的去除比率 (100%的Cr(VI),99%的Pb(II)) 与低压下降 (246Pa和234Pa,分别).
- 一个复合膜有效地同时去除了Cr (VI) 和Pb (II).
结论:
- 具有成本效益的纤维素膜在废水中去除Cr (VI) 和Pb (II) 方面表现出色.
- 开发的膜具有高吸附能力,低压下降和回收的潜力.
- 这些材料代表了有效的工业废水处理的有希望的解决方案.
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