一种新的可扩展的多化胺海绵式过矩阵,用于连续超快速吸附阳离子污染物
Noha Amaly1, Ahmed Y El-Moghazy2, Gang Sun3
1Department of Biological and Agricultural Engineering, University of California, Davis, USA; Polymeric Materials Research Department, Advanced Technology and New Materials Research Institute, City of Scientific Research and Technological Applications (SRTA-City), New Borg El-Arab City, 21934, Alexandria, Egypt; Department of Population Health and Reproduction, School of Veterinary Medicine, University of California-Davis, USA.
Chemosphere
|December 29, 2023
概括
一种新型的多化胺海绵 (MS+) 有效地从废水中捕获离子污染物,如酸盐和孟加拉. 这种可重复使用的材料为工业应用提供了快速吸附和高稳定性.
科学领域:
- 材料科学 材料科学 材料科学
- 环境化学环境化学
- 水处理 处理水的方法
背景情况:
- 从工业废水中捕获离子污染物需要高流量和快速吸附,这仍然是一个重大挑战.
- 商用胺海绵 (MS) 具有多孔结构,但缺乏固有的污染物结合能力.
研究的目的:
- 开发一种功能化的胺海绵 (MS+),具有增强的阳离子污染物吸附能力.
- 评估MS+用于废水处理的吸附效率,动力学,稳定性和可回收性.
主要方法:
- 通过单步核性添加反应,使用甘三甲基化物 (GMTA) 进行胺海绵 (MS) 的共价改性.
- 聚化胺海绵 (MS+) 对其与阴离子的静电相互作用的表征.
- 在模拟和真实废水中使用孟加拉 (RB) 和酸盐 (P) 的静态和动态吸附实验.
主要成果:
- 开发的MS+表现出强烈的静电相互作用与各种离子在广泛的pH范围 (3-11).
- 实现了高静态吸附能力:酸盐 (P) 在5分钟内达到400 mg/g,孟加拉 (RB) 在60秒内达到600 mg/g.
- 使用简单的NaCl化,MS+表现出极好的稳定性和可回收性,长达15个循环,在真实肥料废水中实现了P的4.4丰富系数.
结论:
- 功能化的MS+是一种具有成本效益,稳定和高效的吸附剂,可快速从废水中去除阴离子污染物.
- 该材料的巨孔结构和正电荷促进了快速的动态丰富过程.
- MS+具有更广泛的应用潜力,用于处理来自不同污染水源的各种离子物种.
相关概念视频
01:17Ion Exchange
593
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...
593
01:09Analyte Adsorption and Distribution
664
In certain chromatographic separations, solutes transfer between the mobile phase and the stationary phase via sorption, which typically refers to the process of adsorption. For many chromatographic systems, the sorption process often depends on the polarity of the compounds—an expression of the overall dipole moment within the molecule. During the separation process, there is competition between the solute and solvent for adsorption to the stationary phase. Highly polar compounds and...
664
01:15Dialysis
693
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...
693