微过膜孔功能化与 PFAS 修复的初级和四级氨基:捕获,再生和再利用
Sam Thompson1, Angela M Gutierrez2, Jennifer Bukowski1
1Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY 40506, USA.
Molecules (Basel, Switzerland)
|September 14, 2024
概括
这项研究开发了修改后的膜,以从水中捕获per-和多基物质 (PFAS). 新的膜有效地去除这些污染物,可以重复使用,有助于安全饮用水计划.
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:
- 全球供水源因工业广泛使用而越来越多地被和多基物质 (PFAS) 污染.
- 传统的废水处理方法产生缩的废物流,这给环境带来挑战.
- 需要先进的处理解决方案,以有效地去除和管理PFAS污染物.
研究的目的:
- 开发和评估一种选择性离子交换膜,用于从水流中捕获和缩PFAS.
- 为了研究功能化微过膜在PFAS去除方面的性能.
- 评估开发的膜技术的可重复使用性和效率.
主要方法:
- 商业微过膜通过毛孔功能化与含有初级和四级胺的聚合物网络进行了修改.
- 对两种功能化类型的膜负荷量化 (四度性为0.22-0.85毫摩尔/g,初级为0.97-3.4毫摩尔/g).
- 使用酸 (长链) 和酸 (短链) 测试了PFAS去除效率,并分析了水透率和排斥率.
主要成果:
- 修改后的膜显示水的透度在45-131 LMH/bar.之间.
- 实现了高排斥率: perfluorooctanoic 酸高达90%, perfluorobutyric 酸高达50-80%,经过30%的透回收.
- 再生膜在三个操作周期中保持了捕获性能,证明了可重复使用性.
结论:
- 功能化的离子交换膜为从水中选择性捕获和缩PFAS提供了一个有希望的方法.
- 开发的膜平台具有多功能性,可以适应各种应用,以提高水安全.
- 优化捕获效率包括考虑电荷密度,水流和污染物度,以提高水处理效率.
更多相关视频
07:32Synthesis of Hydrogels with Antifouling Properties As Membranes for Water Purification
Published on: April 7, 2017
9.4K
09:04Identifying Per- and Polyfluorinated Chemical Species with a Combined Targeted and Non-Targeted-Screening High-Resolution Mass Spectrometry Workflow
Published on: April 18, 2019
12.4K
相关概念视频
00:46Bioremediation
17.4K
Bioremediation is the use of prokaryotes, fungi, or plants to remove pollutants from the environment. This process has been used to remove harmful toxins in groundwater as a byproduct of agricultural run-off and also to clean up oil spills.
17.4K
01:26Microbial Bioremediation of Hydrocarbons
150
Bioremediation is an environmentally sustainable process that employs living organisms—primarily microorganisms—to degrade or neutralize pollutants from contaminated environments. In oil spills and hydrocarbon pollution, bioremediation involves the use of hydrocarbon-degrading bacteria to transform toxic compounds into less harmful substances. This approach leverages natural microbial metabolic processes and is considered both cost-effective and ecologically favorable compared to...
150
01:28Microbial Bioremediation of Pesticides
85
Pesticides often feature structurally complex chemical architectures, incorporating halogen groups and multiple aromatic rings. These characteristics confer high chemical stability, rendering many pesticides resistant to natural degradation processes. This resistance poses significant environmental concerns, as persistent pesticide residues can accumulate in ecosystems and affect non-target organisms.Despite the inherent stability of many pesticides, certain microorganisms possess the metabolic...
85
01:28Microbial Bioremediation of Plastics
131
Polyethylene terephthalate (PET) is a synthetic polymer widely utilized in the packaging industry, particularly for bottles and containers. Due to its chemical stability and durability, PET accumulates in the environment, contributing significantly to plastic pollution. It comprises repeating units of terephthalic acid and ethylene glycol, resulting in a semi-crystalline structure that is resistant to natural degradation processes.A notable breakthrough in plastic biodegradation came with the...
131