在纳米过中分层的双氧化物作为去除酸盐的新方法
Hossein Haji Mohammadi Shire Jini1, Zahra Zangeneh1, Toraj Mohammadi2
1Center of Excellence for Membrane Research and Technology, Department of Chemical, Petroleum and Gas Engineering, Iran University of Science and Technology (IUST), Narmak, Tehran, Iran.
Scientific reports
|October 17, 2025
概括
这项研究探讨了层层的双氧化物 (LDH) 纳米粒子和纳米过膜,以去除酸盐. 在薄膜复合材料纳米过膜中浸Mn的Zn-Al LDH显示了对净化水的有希望的结果.
科学领域:
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 水中的高酸盐度对人类健康构成重大风险.
- 有效的酸盐去除技术对于确保安全饮用水至关重要.
研究的目的:
- 为了评估层叠双氧化物 (LDH) 纳米粒子和LDH结合的薄膜复合纳米过 (TFC-NF) 膜,以去除酸盐.
- 为了比较不同LDH成分和膜制造方法的有效性.
主要方法:
- 与Mg-Al,Ni-Fe和Mn浸的Zn-Al LDH纳米颗粒的共同沉和表征.
- 批量吸附实验,以评估通过LDHNP去除酸盐.
- 嵌入LDHNP的TFC-NF膜的制造和表征,包括层次的修改.
- 在受控的压力和温度下使用酸盐溶液评估膜性能.
主要成果:
- 在测试的NP中,Ni-Fe LDH纳米颗粒表现出最高的酸盐排斥率 (13-14%).
- 一个TFC-NF膜具有0.25%重量%的Mn浸的Zn-Al LDH,实现了43%的酸盐排斥,纯水流量为4.5 L/m2h bar-1.1.
- 经过层次修改的TFC-NF膜的排斥率较低 (17%) 但流量较高 (7.7 L/m2h bar-1).
结论:
- 嵌入LDH的TFC-NF膜显示了从水中去除酸盐的潜力.
- 优化LDH组成和膜结构是提高性能的关键.
- 需要进一步的研究,以便将这些技术扩展到实际水处理应用中.
更多相关视频
07:28An Efficient Method for Selective Desalination of Radioactive Iodine Anions by Using Gold Nanoparticles-Embedded Membrane Filter
Published on: July 13, 2018
7.8K
10:19Three-Dimensionally Printed Microfluidic Cross-flow System for Ultrafiltration/Nanofiltration Membrane Performance Testing
Published on: February 13, 2016
11.8K
相关概念视频
01:15Dialysis
1.6K
Dialysis is a diffusion-based purification process that separates analyte molecules from a complex matrix. This is accomplished by allowing molecules in the solution to pass through a semipermeable membrane into a liquid on the other side. The membrane is usually made of cellulose acetate or cellulose nitrate, and the second liquid must be miscible with the solution. Ions (e.g., chloride or sodium) or organic molecules (e.g., glucose) can pass through the membrane pores, which generally have...
1.6K
01:17Ion Exchange
1.1K
Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or...
1.1K
01:09Colloidal precipitates
4.9K
The high insolubility of some precipitates can result in an unfavorable relative supersaturation. This can lead to colloidal particles with a large surface-to-mass ratio, where adsorption is promoted. For instance, in the precipitation of silver chloride, silver ions are adsorbed on the surface of the colloidal particles, forming a primary layer. This layer attracts ions of opposite charge (such as nitrate ions), forming a diffuse secondary layer of adsorbed ions. This electric double layer...
4.9K
01:06Coagulation
1.2K
Colloidal solids are solid particles suspended in solution. They are usually negatively charged, attracting a compact primary layer of positively charged ions, which attract more counterions to form an electrical double layer. Electrostatic repulsion between the charged double layers prevents the particles from colliding, stabilizing the colloids. These solids are often undesirable because they can contain toxins that are difficult to remove. Coagulation is a technique that helps aggregate and...
1.2K