在环境相关度下的β-环氧德烯聚合物网络封存剂
Leilei Xiao1,2, Yuhan Ling3, Alaaeddin Alsbaiee2
1Department of Chemistry, Northwestern University , Evanston, Illinois 60208, United States.
Journal of the American Chemical Society
|May 31, 2017
概括
一种新的β-环氧 (β-CD) 聚合物有效地从水中去除酸 (PFOA). 这种吸附剂具有很高的亲和力,可以重复使用,为PFOA水污染提供了有前途的解决方案.
科学领域:
- 环境化学
- 材料科学
- 处理水
背景情况:
- perfluorooctanoic acid (PFOA) 等多化物质 (PFAS) 是水源中存在的持续性环境污染物.
- 现有的PFAS修复方法面临性能限制,导致需要新型吸附材料.
研究的目的:
- 开发和评估一种基于β-cyclodextrin (β-CD) 的新型聚合物网络作为PFOA去除的吸附剂.
- 将β-CD聚合物的性能与已知吸附剂,如粉状活性炭进行比较.
主要方法:
- 一个基于β-环极 (β-CD) 的聚合物网络的合成.
- 吸附实验以确定PFOA的去除效率,容量和动力学.
- 吸附剂的再生和可重复使用性测试.
- 在酸的存在下对吸附剂的性能进行评估.
主要成果:
- 该β-CD聚合物对PFOA的亲和力比粉状活性炭更高.
- 该聚合物成功地将PFOA度从1μg L-1降低到<10 ng L-1,明显低于美国环保署的建议水平.
- 吸附剂在甲醇洗中被再生并重复使用,保持其性能.
- 与酸对活性炭的影响不同,酸对聚合物的性能没有负面影响.
结论:
- 开发的基于β-CD的聚合物网络是从污染水中去除PFOA的高效吸附剂.
- 这种材料比传统的吸附剂具有优势,包括对自然有机物质污染的抵抗力.
- 这项研究强调了基于β-CD的材料在多功能水处理应用中的潜力.
更多相关视频
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
13.3K
07:06Investigating Long-Distance Transport of Perfluoroalkyl Acids in Wheat via a Split-Root Exposure Technique
Published on: September 28, 2022
2.1K
相关概念视频
Polymer Classification: Architecture
2.9K
Polymers are classified as linear or branched on the basis of their chain architecture. The polymer chains in linear polymers have a long chain-like structure with minimal to no branching at all. Even if a polymer features large substituent groups on the monomer, which appear as branches to the skeleton, it is not considered a branched polymer. A branched polymer contains secondary polymer chains that arise from the main polymer chain. The branching occurs when the polymer growth shifts from...
2.9K
Anionic Chain-Growth Polymerization: Overview
1.8K
The polymerization process that involves carbanion as an intermediate is called anionic polymerization. It is also a type of addition or chain-growth polymerization. Anionic polymerization gets initiated by a strong nucleophile such as an organolithium or a Grignard reagent. The most commonly used initiator for anionic polymerization is butyl lithium. Monomers involved in anionic polymerization must possess a vinyl group bonded to one or two electron-withdrawing groups. For instance,...
1.8K
Complexation Equilibria: The Chelate Effect
1.7K
In complexation reactions, metal atoms or cations interact with ligands to form donor-acceptor adducts called metal complexes. Ligands that bind through one donor site are monodentate, ligands with two donor sites are bidentate, and those with more than two donor sites are polydentate ligands. For example, ethylene diamine is a bidentate ligand that binds through two nitrogen donor atoms, forming a five-membered ring. EDTA is a polydentate ligand that binds through four oxygen and two nitrogen...
1.7K
Cell Inclusions
1.4K
Prokaryotic cells possess a variety of inclusions that play crucial roles in nutrient storage, metabolic processes, and environmental adaptation. These structures enable bacteria to thrive under fluctuating environmental conditions by storing essential resources and optimizing their metabolic efficiency.Carbon Storage: Poly-β-Hydroxybutyric Acid and Glycogen GranulesBacteria frequently store excess carbon in specialized granules. Poly-β-hydroxybutyric acid (PHB) granules are lipid...
1.4K
Bioplastics
70
Bioplastics derived from microbial processes present a sustainable alternative to conventional petroleum-based plastics. Among these, polyhydroxyalkanoates (PHAs), particularly polyhydroxybutyrates (PHBs), have emerged as prominent candidates due to their biodegradability and biocompatibility. These polymers are synthesized by a variety of bacteria, such as Cupriavidus necator and Pseudomonas putida, which naturally accumulate PHAs as intracellular carbon and energy reserves, especially under...
70
Microbial 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
