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Guo XG, Su J, Xie WQ, Ni SN, Gao Y, Su X, Sun XQ. Selective Th(iv) capture from a new metal–organic framework with O− groups. Dalton Trans 2020; 49:4060-4066. [DOI: 10.1039/c9dt04912f] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
New MOF adsorbent with functional N+–O− groups was designed. The material shows fast adsorption of Th(iv) and high removal efficiency, and is selective over La(iii), Sm(iii), Ho(iii), Cd(ii), Pb(ii) and K(i) ions.
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Affiliation(s)
- Xiang-Guang Guo
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures
- and Fujian Key Laboratory of Nanomaterials
- Fujian Institute of Research on the Structure of Matter
- Chinese Academy of Sciences
- Fuzhou
| | - Jia Su
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures
- and Fujian Key Laboratory of Nanomaterials
- Fujian Institute of Research on the Structure of Matter
- Chinese Academy of Sciences
- Fuzhou
| | - Wen-Qi Xie
- Fujian Research Center for Rare Earth Engineering Technology
- Xiamen Institute of Rare Earth Materials
- Haixi Institute
- Chinese Academy of Sciences
- Xiamen 361021
| | - Shuai-Nan Ni
- Fujian Research Center for Rare Earth Engineering Technology
- Xiamen Institute of Rare Earth Materials
- Haixi Institute
- Chinese Academy of Sciences
- Xiamen 361021
| | - Yun Gao
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures
- and Fujian Key Laboratory of Nanomaterials
- Fujian Institute of Research on the Structure of Matter
- Chinese Academy of Sciences
- Fuzhou
| | - Xiang Su
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures
- and Fujian Key Laboratory of Nanomaterials
- Fujian Institute of Research on the Structure of Matter
- Chinese Academy of Sciences
- Fuzhou
| | - Xiao-Qi Sun
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures
- and Fujian Key Laboratory of Nanomaterials
- Fujian Institute of Research on the Structure of Matter
- Chinese Academy of Sciences
- Fuzhou
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52
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Manousi N, Giannakoudakis DA, Rosenberg E, Zachariadis GA. Extraction of Metal Ions with Metal-Organic Frameworks. Molecules 2019; 24:E4605. [PMID: 31888229 PMCID: PMC6943743 DOI: 10.3390/molecules24244605] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2019] [Revised: 12/09/2019] [Accepted: 12/13/2019] [Indexed: 12/12/2022] Open
Abstract
Metal-organic frameworks (MOFs) are crystalline porous materials composed of metal ions or clusters coordinated with organic linkers. Due to their extraordinary properties such as high porosity with homogeneous and tunable in size pores/cages, as well as high thermal and chemical stability, MOFs have gained attention in diverse analytical applications. MOFs have been coupled with a wide variety of extraction techniques including solid-phase extraction (SPE), dispersive solid-phase extraction (d-SPE), and magnetic solid-phase extraction (MSPE) for the extraction and preconcentration of metal ions from complex matrices. The low concentration levels of metal ions in real samples including food samples, environmental samples, and biological samples, as well as the increased number of potentially interfering ions, make the determination of trace levels of metal ions still challenging. A wide variety of MOF materials have been employed for the extraction of metals from sample matrices prior to their determination with spectrometric techniques.
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Affiliation(s)
- Natalia Manousi
- Laboratory of Analytical Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
| | | | - Erwin Rosenberg
- Institute of Chemical Technology and Analytics, Vienna University of Technology, 1060 Vienna, Austria;
| | - George A. Zachariadis
- Laboratory of Analytical Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
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53
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Zhao Q, Zhu L, Lin G, Chen G, Liu B, Zhang L, Duan T, Lei J. Controllable Synthesis of Porous Cu-BTC@polymer Composite Beads for Iodine Capture. ACS APPLIED MATERIALS & INTERFACES 2019; 11:42635-42645. [PMID: 31633332 DOI: 10.1021/acsami.9b15421] [Citation(s) in RCA: 59] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The efficient and safe capture of radioactive iodine (129I or 131I) is of great significance in nuclear waste disposal. Here, we report millimeter-scale poly(ether sulfone) composite beads loaded with porous Cu-BTC [Cu3(BTC)2, BTC = 1,3,5-benzenetricarboxylate] (Cu-BTC@PES), prepared by a phase inversion method for the removal of volatile iodine. Three kinds of Cu-BTC@PES composite beads were obtained with different Cu-BTC contents of 48.6, 60.2, and 71.9%, respectively. While maintaining crystallinity, the composite beads exhibited higher I2 vapor adsorption capacity (639 mg/g) in the form of iodine molecules. The iodine absorption up to 260 mg/g and the adsorption was followed Langmuir isotherm and pseudo-second-order kinetic model. Furthermore, the composite beads can still absorb more than 85% of iodine after 3 cycles of regeneration with excellent recyclability. The resulting Cu-BTC@PES composite beads show great potential for the sustainable removal of radioactive iodine.
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Affiliation(s)
- Qian Zhao
- School of Physics and Space Sciences , China West Normal University , Nanchong 637002 , China
| | | | - Guanghui Lin
- School of Physics and Space Sciences , China West Normal University , Nanchong 637002 , China
| | | | | | | | | | - Jiehong Lei
- School of Physics and Space Sciences , China West Normal University , Nanchong 637002 , China
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54
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Yu J, Liao H, Zhu W, Duan T, Wang S, Kuang M, Zhang Y, Lin X, Luo X, Zhou J. Marinobacter sp. Stable Hydrous Titanium Oxide-Functionalized Bovine Serum Albumin Nanospheres for Uranium Capture from Spiked Seawater. ACS APPLIED MATERIALS & INTERFACES 2019; 11:40898-40908. [PMID: 31573178 DOI: 10.1021/acsami.9b14542] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
A novel nanospherical hydrous titanium oxide adsorbent (hydrous titanium oxide-immobilized bovine serum albumin nanospheres, HTO-BSA-NSs) was prepared by immobilizing HTOs with a manipulated molecular mass and number of active sites for uranium on the surface of BSA-NSs. The adsorption performances of HTO-BSA-NSs were investigated in spiked natural seawater with extra 8 ppm uranium. The results demonstrated that HTO-BSA-NSs are capable of uranium capture from a complex aqueous matrix with a low uranium concentration. Meanwhile, the microbial stability of HTO-BSA-NSs in sterilized natural seawater with Marinobacter sp. was investigated and observed through an optical microscope and TEM, revealing that the wrapped HTOs could protect the BSA-NSs from the decomposition of microorganisms, and the structure and functional groups of HTO-BSA-NSs remain stable compared with the BSA-NSs. In addition, the uranium adsorption mechanism of HTO-BSA-NSs is mainly recognized as dehydrated complexation, which was concluded from characterization analysis, adsorption model fitting, and theoretical calculations based on density functional theory. The remarkable uranium adsorption performance and microbial stability of HTO-BSA-NSs indicated that they have the potential to be a low-cost and environmentally friendly adsorbent for uranium extraction from complex environments such as seawater or uranium-containing industrial wastewater.
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Affiliation(s)
| | | | | | | | - Shanlin Wang
- Institute of Computer Application , China Academy of Engineering Physics , Mianyang , Sichuan 621900 , PR China
| | - Meng Kuang
- Institute of Cotton Research, Chinese Academy of Agriculture Sciences/Zhengzhou Research Base, State Key Laboratory of Cotton Biology , Zhengzhou University , Zhengzhou 450001 , PR China
| | - Yongde Zhang
- Institute of Computer Application , China Academy of Engineering Physics , Mianyang , Sichuan 621900 , PR China
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55
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Ding J, Yan Z, Feng L, Zhai F, Chen X, Xu Y, Tang S, Huang C, Li L, Pan N, He Y, Jin Y, Xia C. Benzotriazole decorated graphene oxide for efficient removal of U(VI). ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2019; 253:221-230. [PMID: 31310872 DOI: 10.1016/j.envpol.2019.06.109] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2019] [Revised: 06/26/2019] [Accepted: 06/27/2019] [Indexed: 06/10/2023]
Abstract
There is a need to develop highly efficient materials for capturing uranium from nuclear wastewater. Here, 5-methylbenzotriazole modified graphene oxide (MBTA-GO) was used to adsorb U(VI) from aqueous solution. By the trials of different conditions, we found that the removal of U(VI) from acidic solution was strongly dependent on pH but independent of ionic strength. The U(VI) adsorption was perfectly conformed to the pseudo-second-order kinetics and the adsorption isotherms were simulated by the Langmuir model well. A high removal capacity (qmax = 264 mg/g) for U(VI) at pH 3.5 was obtained. XPS, EXAFS analyses and DFT calculations revealed that the mechanism of uranium capture was ascribed to (i) the surface complexation by benzotriazole and carboxyl groups (providing lone pair electrons) on MBTA-GO and (ii) enhanced synergistic coordination ability of delocalized π-bond of triazole group toward U due to the transfer of electrons from graphene sheet to benzotriazole. DFT calculations further demonstrated that benzotriazole displayed stronger binding with U(VI) compared to carboxyl group due to higher binding energy of [Side/Surface-U-MBTA-GO] (79.745, 54.986 kcal/mol) than [MBTA-GO-COOH-U] (27.131 kcal/mol). This work will provide valuable insight into designing novel nitrogen-containing adsorbents for practical application in wastewater treatment.
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Affiliation(s)
- Jie Ding
- College of Chemistry, Sichuan University, Chengdu, 610064, China
| | - Zijun Yan
- College of Chemistry, Sichuan University, Chengdu, 610064, China
| | - Lanqi Feng
- College of Chemistry, Sichuan University, Chengdu, 610064, China
| | - Fuwan Zhai
- College of Chemistry, Sichuan University, Chengdu, 610064, China
| | - Xiao Chen
- College of Chemistry and Material Science, Sichuan Normal University, Chengdu, 610066, China
| | - Yuwei Xu
- College of Chemistry, Sichuan University, Chengdu, 610064, China
| | - Siqun Tang
- College of Chemistry, Sichuan University, Chengdu, 610064, China
| | - Chao Huang
- College of Chemistry, Sichuan University, Chengdu, 610064, China
| | - Laicai Li
- College of Chemistry and Material Science, Sichuan Normal University, Chengdu, 610066, China
| | - Ning Pan
- Key Subject Laboratory of National Defense for Nuclear Wastes and Environmental Safety, Southwest University of Science and Technology, Mianyang, 621010, China
| | - Yi He
- Analytical & Testing Center, Sichuan University, Chengdu, 610064, China
| | - Yongdong Jin
- College of Chemistry, Sichuan University, Chengdu, 610064, China
| | - Chuanqin Xia
- College of Chemistry, Sichuan University, Chengdu, 610064, China.
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56
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Wang J, Yan B. Improving Covalent Organic Frameworks Fluorescence by Triethylamine Pinpoint Surgery as Selective Biomarker Sensor for Diabetes Mellitus Diagnosis. Anal Chem 2019; 91:13183-13190. [PMID: 31529947 DOI: 10.1021/acs.analchem.9b03534] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
The nitrogen-containing imine or hydrazone linked covalent organic frameworks (COFs) are poorly luminescent due to the fluorescence quenching by nitrogen atoms in the linkages, even if highly luminescent units and linkers are employed. The fluorescence quenching pathway to prevent linkage-originated to mitigate the inherent limitations of the linkage is a promising method for luminescent COFs. The generation of N- by deprotonation of the N-H unit eliminates the electron transfer from N lone pair to COF (TpPa-1) and enhances the luminescence. In this work, TpPa-1 achieved turn-on luminescence response with good sensitivity and reproducibility toward triethylamine (TEA) vapor in the process of deprotonation. The fabricated detector offers a viable approach for sensing ppm-level TEA, which can remind people to take timely measures to reduce the environmental hazards caused by TEA. The fluorescent sensor TpPa-1@LE constructed by the products of TpPa-1 and TEA can quantitatively trace biomarker methylglyoxal (MGO) for diabetes mellitus diagnosis in serum system. Furthermore, using TEA and MGO as input signals and the two fluorescence emissions G476 and Y525 as output signals, an advanced analytical device based on two Boolean logic gates with INH and AND function is constructed. This work provides a new strategy for improving the weak luminescence of COF in aqueous solution and realizes selective response to biomarker (MGO) for diabetes mellitus diagnosis.
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Affiliation(s)
- Jinmin Wang
- School of Chemical Science and Engineering , Tongji University , 1239 Siping Road , Shanghai 200092 , China
| | - Bing Yan
- School of Chemical Science and Engineering , Tongji University , 1239 Siping Road , Shanghai 200092 , China.,School of Materials Science and Engineering , Liaocheng University , Liaocheng 252059 , China
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57
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Zhang W, Bu A, Ji Q, Min L, Zhao S, Wang Y, Chen J. p Ka-Directed Incorporation of Phosphonates into MOF-808 via Ligand Exchange: Stability and Adsorption Properties for Uranium. ACS APPLIED MATERIALS & INTERFACES 2019; 11:33931-33940. [PMID: 31409065 DOI: 10.1021/acsami.9b10920] [Citation(s) in RCA: 63] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
We report a class of pKa-directed, precise incorporation of phosphonate ligands into a zirconium-based metal-organic framework (Zr-MOF), MOF-808, via ligand exchange. By replacing of formate ligands with methylphosphonic acid (MPA), ethanephosphonic acid (EPA), and vinylphosphonic acid (VPA), whose pKa values are slightly higher than that of the benzenetricarboxylic acid (BTC) linker in MOF-808, daughter MOFs can be synthesized without controlling the stoichiometric amounts of added MPA. The methylphosphonate MOFs (808-MPAs) demonstrate high porosities, with only small changes in the pore diameter and specific surface area when compared with the parent MOF-808. PXRD patterns and structure refinements indicate the expansion of the lattice for all MOFs after decorating with methylphosphonate ligands. The XPS spectra reveal a charge redistribution of the Zr6 node after ligand exchange. FTIR and 31P MAS NMR spectra, combined with DFT calculation, suggest that the methylphosphonate ligand is connected to the Zr6 node as CH3P(O)(OZr)(OH) species with an accessible acidic P-OH group. Besides, 808-MPAs demonstrate excellent chemical stability in concentrated HCl, concentrated HNO3, hot water, and 0.2 mol/L trifluoroacetic acid solutions. Impressively, 808-MPAs show ultrafast adsorption performance for uranyl ions using the ion-exchange property of P-OH sites in their cavity environment, with an equilibrium time of 10 min, much quicker than the previous adsorbents. The present study demonstrates a series of important proof-of-concept examples of the pKa-directed Zr-MOFs with tunable phosphonate-terminated ligands, which can extend to other phosphonate-functionalized Zr-based framework platforms in the near future.
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Affiliation(s)
- Wen Zhang
- State Key Laboratory of Chemical Engineering, Tianjin Key Laboratory of Membrane Science & Desalination Technology, and School of Chemical Engineering and Technology , Tianjin University , Tianjin 300350 , China
| | - An Bu
- State Key Laboratory of Chemical Engineering, Tianjin Key Laboratory of Membrane Science & Desalination Technology, and School of Chemical Engineering and Technology , Tianjin University , Tianjin 300350 , China
| | - Qingyuan Ji
- State Key Laboratory of Chemical Engineering, Tianjin Key Laboratory of Membrane Science & Desalination Technology, and School of Chemical Engineering and Technology , Tianjin University , Tianjin 300350 , China
| | - Luofu Min
- State Key Laboratory of Chemical Engineering, Tianjin Key Laboratory of Membrane Science & Desalination Technology, and School of Chemical Engineering and Technology , Tianjin University , Tianjin 300350 , China
| | - Song Zhao
- State Key Laboratory of Chemical Engineering, Tianjin Key Laboratory of Membrane Science & Desalination Technology, and School of Chemical Engineering and Technology , Tianjin University , Tianjin 300350 , China
| | - Yuxin Wang
- State Key Laboratory of Chemical Engineering, Tianjin Key Laboratory of Membrane Science & Desalination Technology, and School of Chemical Engineering and Technology , Tianjin University , Tianjin 300350 , China
| | - Jing Chen
- Collaborative Innovation Center of Advanced Nuclear Energy Technology, Beijing Key Lab of Radioactive Waste Treatment, and Institute of Nuclear and New Energy Technology , Tsinghua University , Beijing 100084 , China
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58
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Wang X, Chen L, Wang L, Fan Q, Pan D, Li J, Chi F, Xie Y, Yu S, Xiao C, Luo F, Wang J, Wang X, Chen C, Wu W, Shi W, Wang S, Wang X. Synthesis of novel nanomaterials and their application in efficient removal of radionuclides. Sci China Chem 2019; 62:933-967. [DOI: https:/doi.org/10.1007/s11426-019-9492-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2019] [Accepted: 05/05/2019] [Indexed: 06/25/2023]
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59
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Hu Y, Misal Castro LC, Drouin E, Florek J, Kählig H, Larivière D, Kleitz F, Fontaine FG. Size-Selective Separation of Rare Earth Elements Using Functionalized Mesoporous Silica Materials. ACS APPLIED MATERIALS & INTERFACES 2019; 11:23681-23691. [PMID: 31117444 DOI: 10.1021/acsami.9b04183] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The separation and preconcentration of rare earth elements (REEs) from mineral concentrates in an economically and environmentally sustainable manner are difficult tasks due to their similar physicochemical properties. Herein, a series of tetradentate phenylenedioxy diamide (PDDA) ligands were synthesized and grafted on large-pore three-dimensional KIT-6 mesoporous silica. In solid-phase extraction, the hybrid sorbents enable a size-selective separation of REEs on the basis of the bite angles of the ligands. In particular, smaller REE3+ ions are preferentially extracted by KIT-6-1,2-PDDA, whereas light REEs with larger ionic radius are favored by KIT-6-1,3-PDDA. The exposure of bauxite residue digestion solution containing REEs as well as a number of types of competitive ions (including Th and U) to the sorbents results in selective recovery of target REEs. The possibility of regenerating the mesoporous sorbents through a simple loading-stripping-regeneration process is demonstrated over up to five cycles with no significant loss in REE extraction capacity, suggesting adequate chemical and structural stability of the new sorbent materials.
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Affiliation(s)
- Yimu Hu
- Department of Chemistry , Université Laval , Québec G1V 0A6 , QC , Canada
- Centre en Catalyse et Chimie Verte (C3V) , Université Laval , Québec G1V 0A6 , QC , Canada
| | - Luis C Misal Castro
- Department of Chemistry , Université Laval , Québec G1V 0A6 , QC , Canada
- Centre en Catalyse et Chimie Verte (C3V) , Université Laval , Québec G1V 0A6 , QC , Canada
| | - Elisabeth Drouin
- Department of Chemistry , Université Laval , Québec G1V 0A6 , QC , Canada
- Centre en Catalyse et Chimie Verte (C3V) , Université Laval , Québec G1V 0A6 , QC , Canada
| | | | | | - Dominic Larivière
- Department of Chemistry , Université Laval , Québec G1V 0A6 , QC , Canada
- Centre en Catalyse et Chimie Verte (C3V) , Université Laval , Québec G1V 0A6 , QC , Canada
| | | | - Frédéric-Georges Fontaine
- Department of Chemistry , Université Laval , Québec G1V 0A6 , QC , Canada
- Centre en Catalyse et Chimie Verte (C3V) , Université Laval , Québec G1V 0A6 , QC , Canada
- Canada Research Chair in Green Catalysis and Metal-Free Processes , Québec G1V 0A6 , Canada
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60
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Synthesis of novel nanomaterials and their application in efficient removal of radionuclides. Sci China Chem 2019. [DOI: 10.1007/s11426-019-9492-4] [Citation(s) in RCA: 168] [Impact Index Per Article: 33.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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61
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Li C, Wang M, Luo X. Uptake of uranium from aqueous solution by Nymphaea tetragona Georgi: The effect of the accompanying heavy metals. Appl Radiat Isot 2019; 150:157-163. [PMID: 31151070 DOI: 10.1016/j.apradiso.2019.05.024] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2018] [Revised: 03/30/2019] [Accepted: 05/16/2019] [Indexed: 11/16/2022]
Abstract
This study evaluated the application value of Nymphaea tetragona Georgi (N. tetragona) in the remediation of water co-contaminated with U and the U-accompanying heavy metals (UAHMs). Under greenhouse conditions, a 5-factor quadratic regression orthogonal rotation combination design (QRORCD) was employed to set up a hydroponic experiment to evaluate the effect of U and UAHMs on the enrichment of U from water in N. tetragona. The results showed that the coexisting U and UAHMs tend to inhibit the amount of U enriched in the whole plant. Under co-contaminated conditions, Mn and Hg can increase the enrichment of U from water in N. tetragona, while Pb and As usually inhibit it. The predicted amount of U enriched in the whole plant (UWP) was 57,131.32 μg (1938.66 mg•kg-1 D.W.), and the validation result of the optimization scheme was 53,285.88 μg. A single-factor effect analysis showed that the influence of the 5 types of contamination on the UWP was in the order of U > Hg > Pb > Mn > As. The interactive effects analysis showed that the concentrations of U and As, Mn and As, and Pb and Hg all had significant interactive effects on the UWP, and the change trend exhibited a basin or saddle shape.
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Affiliation(s)
- Chen Li
- School of Environment and Resources, Southwest University of Science and Technology, Mianyang, Sichuan, 621010, PR China; School of Chemistry and Environmental Science, Shaanxi University of Technology, Hanzhong, Shaanxi, 723001, PR China; Engineering Research Center of Biomass Materials, Ministry of Education, Mianyang, Sichuan, 621010, PR China; State Key Laboratory of NBC Protection for Civilian, Beijing, 102205, PR China.
| | - Maolin Wang
- School of Environment and Resources, Southwest University of Science and Technology, Mianyang, Sichuan, 621010, PR China; Engineering Research Center of Biomass Materials, Ministry of Education, Mianyang, Sichuan, 621010, PR China; State Key Laboratory of NBC Protection for Civilian, Beijing, 102205, PR China
| | - Xuegang Luo
- Engineering Research Center of Biomass Materials, Ministry of Education, Mianyang, Sichuan, 621010, PR China.
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62
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Efficient and selective sensing of Cu2+ and UO22+ by a europium metal-organic framework. Talanta 2019; 196:515-522. [DOI: 10.1016/j.talanta.2018.12.088] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2018] [Revised: 12/21/2018] [Accepted: 12/25/2018] [Indexed: 12/23/2022]
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63
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Titanium Silicates Precipitated on the Rice Husk Biochar as Adsorbents for the Extraction of Cesium and Strontium Radioisotope Ions. COLLOIDS AND INTERFACES 2019. [DOI: 10.3390/colloids3010036] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The aim of the work was the development of cheap and effective adsorbents based on titanium silicates deposited on the products of thermochemical processing of rice husk to extract cesium and strontium radioisotopes from aqueous media. Synthesis of adsorbents was carried out using the cheapest and widely used titanium water-soluble reagent, titanium sulfate (an intermediate product of white rutile pigment production), as feedstock. After treatment with titanium sulfate and neutralization, hydrothermal treatment was carried out in various ways. The traditional method of processing in an autoclave was used, as well as the blowing at different temperatures by steam. The distribution coefficients and the adsorption capacity for cesium and strontium ions on these sorbents were studied. Along with the chemical composition of adsorbents obtained by those ways, the type and the temperature of hydrothermal treatment also affected the adsorption properties. It was found that the adsorbent obtained by hydrothermal treatment in an autoclave has the highest degree of cesium ions extraction (Kd = 27,500). The highest degree of strontium ions extraction (Kd = 2,095,000) has an adsorbent obtained by hydrothermal treatment with water vapor blowing.
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