Preferential elimination of negatively charged micropollutants in water over cerium-based metal-organic frameworks

被引:9
作者
Mi, Xin [1 ]
Li, Xiang [1 ,3 ]
Wang, Chong-Chen [2 ]
Wang, Bo [1 ,3 ]
机构
[1] Beijing Inst Technol, Adv Technol Res Inst Jinan, Adv Res Inst Multidisciplinary Sci, Sch Mat,Key Lab Cluster Sci,Minis Educ,Beijing Key, 5, South St, Beijing 100081, Peoples R China
[2] Beijing Univ Civil Engn & Architecture, Beijing Adv Innovat Ctr Future Urban Design, Beijing Key Lab Funct Mat Bldg Struct & Environm R, Beijing 100044, Peoples R China
[3] Beijing Inst Technol, Adv Res Inst Multidisciplinary Sci, Beijing 100081, Peoples R China
基金
中国国家自然科学基金;
关键词
Ce-MOFs; perfluoroalkyl carboxylic acids (PFCAs); Pharmaceuticals; Adsorption; Photocatalysis; PERFLUOROOCTANE SULFONATE PFOS; ORGANOPHOSPHATE FLAME RETARDANTS; PERFLUOROALKYL SUBSTANCES; AQUEOUS-SOLUTION; PERFLUORINATED COMPOUNDS; ADSORPTIVE REMOVAL; EFFICIENT REMOVAL; DRINKING-WATER; SORPTION; DYES;
D O I
10.1016/j.seppur.2023.124774
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
In this study, three groups of harmful chemicals at trace amounts (mu g/L) in water with extremely high environmental risk were preferentially removed over cerium-based UiO-66 and MOF-808, including nonsteroidal anti-inflammatory drugs (NSAIDs), quinone antibiotics, and perfluoroalkyl carboxylic acids (PFCAs). Results found that cerium-oxygen clusters with oxygen vacancies and larger pore sizes effectively adsorbed targets by both chemical and physical mechanisms. Remarkably, log K-ow of five PFCAs (PFPeA, PFHxA, PFOA, PFNA, PFDA) with increasing lengths of alkyl chains strongly correlated (R-2 = similar to.99) with ln (v(0)) and Q(e). In contrast, Ce-MOFs rapidly adsorbed NSAIDs and quinone antibiotics, ranking the excellent adsorbents reported so far (e.g., Q(e), (OFC) = 419.8 mg/g on MOF-808). Hydrophobic, diffusion, and electrostatic interaction mechanism were systematically studied using mathematic models, including pseudo first/second-order, Elovich, and WeberMorris intraparticle diffusion ones. Thanks to the generation of reactive species (e.g., center dot OH, O-1(2), center dot O2- and oxygen vacancies) over cerium-oxygen clusters under the irradiation of solar light, aromatic NSAIDs were completely decomposed (>99 %) within 60 min. This study offers helpful guidance for the preferential removal of ECs in water.
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页数:14
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