Porous multifunctional phenylcarbamoylated-β-cyclodextrin polymers for rapid removal of aromatic organic pollutants

IF 5.8 3区 环境科学与生态学 0 ENVIRONMENTAL SCIENCES
He Wang, Congzhi Liu, Xiaofei Ma, Yong Wang
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引用次数: 4

Abstract

In this work, polymers containing a large number of benzene rings and multiple functional groups were designed to remove aromatic organic pollutants. Using tetrafluoroterephthalonitrile (TFTPN) as a rigid crosslinking agent to crosslink different functionalized phenylcarbamoylated-β-cyclodextrin derivatives to prepare a series of porous multifunctional cyclodextrin (CD) polymerizations, including three preliminary polymerized adsorption materials and a mix β-cyclodextrin polymer (X-CDP) prepared via a secondary crosslinking procedure of the above three materials. The X-CDP preparation process connects the pre-formed nanoparticles and increases the presence of linkers inside the particles. At the same time, X-CDP exhibited porous structure with various functional groups such as nitro, chlorine, fluorine, and hydroxyl. Those special characteristics render this material with good adsorption ability towards various aromatic organic pollutants in water, including tetracycline, ibuprofen, dichlorophenol, norfloxacin, bisphenol A, and naphthol. Especially, the maximum adsorption capacity for tetracycline at equilibrium reached 110.56 mg·g−1, which is competitive with the adsorption capacities of other polysaccharide adsorbents. X-CDP removed organic contaminants much more quickly than other adsorbents, reaching almost ~95% of its equilibrium in only 30 s, and the rate constant reaches 2.32 g·mg−1·min−1. The main adsorption process of the pollutants by X-CDP fitted the pseudo-second-order kinetic and Langmuir isotherm well, indicating that the adsorption process is monolayer adsorption. Moreover, X-CDP possessed the good reusability where the pollutant removal rate was only reduced 8.3% after five cycles. Such advantages render the polymer great potential in the rapid treatment of organic pollutants in water bodies.

Abstract Image

多孔多功能苯氨基甲酰化-β-环糊精聚合物快速去除芳香族有机污染物
本研究设计了含有大量苯环和多个官能团的聚合物来去除芳香族有机污染物。以四氟对苯二甲酸乙二腈(TFTPN)为刚性交联剂,对不同功能化的苯基氨基甲酰化-β-环糊精衍生物进行交联,制备了一系列多孔多功能环糊精(CD)聚合,包括三种初步聚合吸附材料和通过上述三种材料的二次交联制备的混合β-环糊精聚合物(X-CDP)。X-CDP制备过程连接了预先形成的纳米颗粒,并增加了颗粒内部连接剂的存在。同时,X-CDP具有含硝基、氯、氟、羟基等多种官能团的多孔结构。这些特性使得该材料对水中各种芳香族有机污染物具有良好的吸附能力,包括四环素、布洛芬、二氯酚、诺氟沙星、双酚A、萘酚等。特别是在平衡状态下,对四环素的最大吸附量达到110.56 mg·g−1,与其他多糖吸附剂的吸附能力相当。X-CDP对有机污染物的去除速度比其他吸附剂快得多,在30 s内达到平衡态的95%左右,速率常数达到2.32 g·mg−1·min−1。X-CDP对污染物的主要吸附过程符合拟二级动力学和Langmuir等温线,表明吸附过程为单层吸附。此外,X-CDP具有良好的重复使用性,经过5个循环后,污染物去除率仅降低了8.3%。这些优点使聚合物在水体中有机污染物的快速处理方面具有很大的潜力。
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来源期刊
CiteScore
8.70
自引率
17.20%
发文量
6549
审稿时长
3.8 months
期刊介绍: Environmental Science and Pollution Research (ESPR) serves the international community in all areas of Environmental Science and related subjects with emphasis on chemical compounds. This includes: - Terrestrial Biology and Ecology - Aquatic Biology and Ecology - Atmospheric Chemistry - Environmental Microbiology/Biobased Energy Sources - Phytoremediation and Ecosystem Restoration - Environmental Analyses and Monitoring - Assessment of Risks and Interactions of Pollutants in the Environment - Conservation Biology and Sustainable Agriculture - Impact of Chemicals/Pollutants on Human and Animal Health It reports from a broad interdisciplinary outlook.
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麦克林
4-chlorophenyl isocyanate | 98%
阿拉丁
4-nitrophenyl isocyanate | 98%
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