用阴离子表面活性剂修饰的卡波克纤维:结构见解和有效去除Cr (VI) 和双A
Mário A B S Nunes1, Anna C D Vilas Boas1, Rodrigo Fernandes2
1Institute of Chemistry, University of São Paulo, Av. Prof. Lineu Prestes 748, São Paulo 05508-000, Brazil.
Journal of colloid and interface science
|December 26, 2024
概括
经过修改的卡波克纤维 (KF) 有效地从水中去除有毒的 (VI) 离子和双A (BPA). KF/CTAB显示出优越的Cr的吸附和减少,证明了其在污染物同时修复方面的潜力.
科学领域:
- 材料科学 材料科学 材料科学
- 环境化学环境化学
- 纳米技术纳米技术
背景情况:
- 卡波克纤维 (KF) 是一种天然的疏水材料,具有水处理的潜力.
- 用CTAB和CPC等表面活性剂修改KF可以增强其吸附性质.
- 六价 (Cr(VI)) 和双A (BPA) 是常见的水污染物,需要有效的去除方法.
研究的目的:
- 用 cetyltrimethylammonium 化物 (CTAB) 和 cetylpyridinium 化物 (CPC) 来修改卡波克纤维 (KF).
- 为了研究改性KF对Cr (VI) 和BPA的吸附能力,单独和在二元混合物中.
- 用光谱和计算方法阐明吸附机制.
主要方法:
- 卡波克纤维修饰使用CTAB和CPC.
- 对于Cr (VI) 和BPA的去除,进行批量和列吸附实验.
- 用于结构分析的小角度X射线散射 (SAXS).
- 用于表面化学研究的X射线光电子光谱学 (XPS).
- 密度函数理论 (DFT) 用于相互作用能量计算.
主要成果:
- 在KF/CTAB和KF/CPC的表面呈现出半菌的形成.
- 与KF/CPC相比,KF/CTAB对Cr (VI) (48.62 mg/g) 和BPA (41.66 mg/g) 的吸附能力更高.
- 在KF/CTAB上的吸附涉及化物取代和降解到CrIII,可能是通过氧化KF的天然成分.
- DFT计算证实CTAB和Cr6之间的相互作用比CPC和Cr6更强.
- 在柱体实验中,KF/CTAB证明了有效的同时去除Cr (VI) 和BPA.
结论:
- 经CTAB修改的卡波克纤维是从水中去除Cr (VI) 和BPA的高效吸附剂.
- 吸附机制涉及静电相互作用,离子交换和Cr6的氧化还原过程.
- 在现实水处理应用中,KF/CTAB显示出对混合污染物的同时修复的希望.
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
12.4K
08:51Preparation of Polypentafluorophenyl acrylate Functionalized SiO2 Beads for Protein Purification
Published on: November 19, 2018
9.5K
相关概念视频
Ion Exchange
546
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...
546
Anionic Chain-Growth Polymerization: Overview
2.1K
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,...
2.1K
