相关实验视频

Updated: Sep 19, 2025

Synthesis of Hydrogels with Antifouling Properties As Membranes for Water Purification

Synthesis of Hydrogels with Antifouling Properties As Membranes for Water Purification

Published on: April 7, 2017

功能性水凝用于从水中选择性去除酸盐,并在需求时释放

Jiangfeng Xu¹, Kirill Efimenko^1,2,3, Christopher B Gorman⁴

¹Department of Chemical & Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina 27695-7905, United States.

Langmuir : the ACS journal of surfaces and colloids

|June 4, 2025

概括

一个新的水凝系统有效地捕获和释放无机酸盐,解决肥料过度使用的问题. 这项创新为管理提供了可持续的解决方案,这对环境和粮食安全至关重要.

科学领域:

环境化学环境化学
材料科学是一种材料科学.
可持续农业可持续农业

背景情况:

过度使用化肥导致经济和环境问题,影响健康,水和粮食安全.
有效的 (P) 管理对于可持续的资源循环至关重要.
开发有效的酸盐捕获和释放方法至关重要.

研究的目的:

开发和描述一种用于选择性无机酸盐捕获和释放的新型水凝系统.
研究水凝中聚乙烯胺 (PEI) 和聚乙烯基乙烯基乙烯基乙-co-maleic无水化物 (PMVEMA) 的协同作用.
为了评估水凝在各种pH条件和酸盐负载中的性能,评估对酸盐的选择性.

主要方法:

一个PEI/PMVEMA水凝系统的合成和特征.
在不同的pH值和负载条件下进行酸盐吸附实验.
在酸盐的存在下进行酸盐溶解研究和选择性评估.

主要成果:

富含PEI的水凝在pH值2.0至7.0之间表现出高酸盐 (P) 捕获能力 (高达65毫克P/g).
在温和的性条件下 (<0.001 M NaOH) 实现了高效的酸盐释放 (96%),这是创纪录的低度.
在特定的化剂pH水平下,对酸盐比酸盐观察到高的分离因子 (α ≈ 50).

结论:

新的PEI/PMVEMA水凝系统提供了一种高效和有选择的方法来捕获和释放无机酸盐.
该系统能够在温和的脱吸条件下运行,其高选择性为管理提供了一个有前途的解决方案.
这项技术有助于减轻过度使用酸盐肥料的不利影响,并提高了资源的可持续性.

更多相关视频

Fabricating Degradable Thermoresponsive Hydrogels on Multiple Length Scales via Reactive Extrusion, Microfluidics, Self-assembly, and Electrospinning

Fabricating Degradable Thermoresponsive Hydrogels on Multiple Length Scales via Reactive Extrusion, Microfluidics, Self-assembly, and Electrospinning

Published on: April 16, 2018

Magnetic and Thermal-sensitive PolyN-isopropylacrylamide-based Microgels for Magnetically Triggered Controlled Release

Magnetic and Thermal-sensitive PolyN-isopropylacrylamide-based Microgels for Magnetically Triggered Controlled Release

Published on: July 4, 2017

相关概念视频

Phosphate Buffer

Phosphate Buffer

The phosphate buffer system is a critical biological mechanism for maintaining pH stability in the body. This system operates primarily through two components: sodium dihydrogen phosphate (NaH2PO4), which acts as a weak acid, and sodium hydrogen phosphate (Na2HPO4), which serves as a weak base.
Sodium dihydrogen phosphate does not fully dissociate in neutral or acidic solutions. When a strong base, such as sodium hydroxide (NaOH), is introduced into the solution, sodium dihydrogen phosphate...

Ion Exchange

Ion Exchange

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...