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Mutual effects behind the simultaneous U(VI) and humic acid adsorption by hierarchical MWCNT/ZIF-8 composites
Li, Jie1,2; Wu, Zheng1; Duan, Qingyun1; Li, Xuede1; Tan, Xiaoli3; Alsaedi, Ahmed4; Hayat, Tasawar4; Chen, Changlun2,4
2019-08-15
Source PublicationJOURNAL OF MOLECULAR LIQUIDS
ISSN0167-7322
Abstract

In natural environments, the sequestration or release of U(VI) is usually affected by the coexistence of natural organic matters (NOM). Former works mainly concentrated on the design of novel adsorbents for the preconcentration of U(VI), while there is a knowledge gap between the coupled adsorption process in the mixed U(VI)-advanced materials-NOM system. Herein, the incorporation of multi-walled carbon nanotubes into zeolitic imidazolate framework-8 (denoted as MWCNTs/ZIF-8) was achieved and applied to sequester U (VI) and humic acids (HA) simultaneously from aquatic environments. The mutual effects of simultaneous U (VI) and HA adsorption affected by various water chemistry and the U(VI)/HA addition sequences were studied systematically. The saturated adsorption amounts were 200.77 and 55.68 mg/g for U(VI) and HA at pH 5.0, respectively, which are higher than most traditional adsorbents. U(VI) adsorption onto MWCNTs/ZIF-8 was pH dependent but independent on ionic strength, revealing that the coordination between Zn atoms and U(Vl) ions was the main reason for U(VI) sequestration, which was further evidenced by the X-ray photoelectron spectroscopy. U(VI) adsorption was improved significantly with the coexistence of HA owing to the appearance of HA-U(VI)-MWCNTs/ZIF-8 ternary complexes, but was independent on the addition sequences, disclosing that U(VI) ions preferred to bind directly onto MWCNTs/ZIF-8 instead of via HA The addition sequence exerted an obvious effect on HA adsorption due to the different adsorption scenario. These findings are essential to predict U (VI) behaviors in geological environments. (C) 2019 Elsevier B.V. All rights reserved.

KeywordU(vi) MWCNTs/ZIF-8 HA Simultaneous adsorption
DOI10.1016/j.molliq.2019.110971
WOS KeywordMETAL-ORGANIC FRAMEWORKS ; MULTIWALLED CARBON NANOTUBES ; AQUEOUS-SOLUTION ; SIMULTANEOUS REMOVAL ; HIGHLY EFFICIENT ; SURFACE COMPLEXATION ; SELECTIVE REMOVAL ; IONIC-STRENGTH ; FULVIC-ACID ; URANIUM
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[21806001] ; Key Laboratory of Photovoltaic and Energy Conservation Materials, Chinese Academy of Sciences
Funding OrganizationNational Natural Science Foundation of China ; Key Laboratory of Photovoltaic and Energy Conservation Materials, Chinese Academy of Sciences
WOS Research AreaChemistry ; Physics
WOS SubjectChemistry, Physical ; Physics, Atomic, Molecular & Chemical
WOS IDWOS:000480664700068
PublisherELSEVIER
Citation statistics
Cited Times:12[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.hfcas.ac.cn:8080/handle/334002/73880
Collection中科院等离子体物理研究所
Corresponding AuthorLi, Jie; Chen, Changlun
Affiliation1.Anhui Agr Univ, Sch Resources & Environm, Hefei 230036, Anhui, Peoples R China
2.Chinese Acad Sci, Inst Plasma Phys, Key Lab Photovolta & Energy Conservat Mat, POB 1126, Hefei 230031, Anhui, Peoples R China
3.North China Elect Power Univ, Coll Environm Sci & Engn, MOE Key Lab Resources & Environm Syst Optimizat, Beijing 102206, Peoples R China
4.King Abdulaziz Univ, Fac Sci, NAAM Res Grp, Jeddah 21589, Saudi Arabia
First Author AffilicationChinese Academy of Sciences, Institute of Plasma Physics, Hefei 230031, Anhui, Peoples R China
Corresponding Author AffilicationChinese Academy of Sciences, Institute of Plasma Physics, Hefei 230031, Anhui, Peoples R China
Recommended Citation
GB/T 7714
Li, Jie,Wu, Zheng,Duan, Qingyun,et al. Mutual effects behind the simultaneous U(VI) and humic acid adsorption by hierarchical MWCNT/ZIF-8 composites[J]. JOURNAL OF MOLECULAR LIQUIDS,2019.
APA Li, Jie.,Wu, Zheng.,Duan, Qingyun.,Li, Xuede.,Tan, Xiaoli.,...&Chen, Changlun.(2019).Mutual effects behind the simultaneous U(VI) and humic acid adsorption by hierarchical MWCNT/ZIF-8 composites.JOURNAL OF MOLECULAR LIQUIDS.
MLA Li, Jie,et al."Mutual effects behind the simultaneous U(VI) and humic acid adsorption by hierarchical MWCNT/ZIF-8 composites".JOURNAL OF MOLECULAR LIQUIDS (2019).
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