Institutional Repository of Chinese Academy of Sciences, Institute of Plasma Physics, Hefei 230031, Anhui, Peoples R China
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 | |
发表期刊 | JOURNAL OF MOLECULAR LIQUIDS |
ISSN | 0167-7322 |
摘要 | 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. |
关键词 | U(vi) MWCNTs/ZIF-8 HA Simultaneous adsorption |
DOI | 10.1016/j.molliq.2019.110971 |
关键词[WOS] | METAL-ORGANIC FRAMEWORKS ; MULTIWALLED CARBON NANOTUBES ; AQUEOUS-SOLUTION ; SIMULTANEOUS REMOVAL ; HIGHLY EFFICIENT ; SURFACE COMPLEXATION ; SELECTIVE REMOVAL ; IONIC-STRENGTH ; FULVIC-ACID ; URANIUM |
收录类别 | SCI |
语种 | 英语 |
资助项目 | National Natural Science Foundation of China[21806001] ; Key Laboratory of Photovoltaic and Energy Conservation Materials, Chinese Academy of Sciences |
项目资助者 | National Natural Science Foundation of China ; Key Laboratory of Photovoltaic and Energy Conservation Materials, Chinese Academy of Sciences |
WOS研究方向 | Chemistry ; Physics |
WOS类目 | Chemistry, Physical ; Physics, Atomic, Molecular & Chemical |
WOS记录号 | WOS:000480664700068 |
出版者 | ELSEVIER |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://ir.hfcas.ac.cn:8080/handle/334002/73880 |
专题 | 中科院等离子体物理研究所 |
通讯作者 | Li, Jie; Chen, Changlun |
作者单位 | 1.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 |
第一作者单位 | 中科院等离子体物理研究所 |
通讯作者单位 | 中科院等离子体物理研究所 |
推荐引用方式 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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