CHEMOSPHERE
·
2019
·
IF 5.108
Yueyue Shi,Dazhen Xiong,Yangyang Zhao,Tiemei Li,Kaige Zhang,Jing Fan
Highly efficient and selective separation of Cr (VI) is great of importance in environmental pollution control . In this study, a novel family of hydrophobic DESs has been designed and synthesized by mixing parabens and quaternary ammonium, and then used to extract heavy metal Cr (VI) from water phase and the content of Cr (VI) is measured by 1,5-diphenylcarbazide spectrophotometry . It is found that the hydrophobic DESs exhibit excellent extraction performance towards Cr (VI). At the 1:1 M ratio of DES to Cr (VI), the extraction capacity is as high as 66.7 mg g −1 , the extraction efficiency is greater than 90% for ultra-trace Cr (VI) (0.51 μg L −1 ), and the preconcentration factor is up to 700. When the concentration of coexisting metal ions (Cd 2+ , Cu 2+ ) and organic compounds ((C 6 H 10 O 5 ) n , C 6 H 12 O 6 ·H 2 O) is 2000 times that of Cr (VI), the extraction efficiency is still above 90%. Compared with ionic liquid extractants, the preparation process of DES is very simple, the atomic utilization rate is 100%, and no waste is produced. These hydrophobic DESs have been used to separate and enrich Cr (VI) from actual water samples with satisfactory recoveries. The possible extraction mechanism is investigated by FT-IR and 1 H NMR.
研究领域:
环境科学
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化学
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DOI
PubMed
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2021
·Vol. 328
·期 1
·481-490
·
IF 1.371
Fu Lingxiao,Pan Xiaohan,Zu Jianhua,He Linfeng
N , N , N ′, N ′-tetramethylmalonamide (TMMA) has been successfully grafted onto the chloroacetylated poly(styrene-co-divinylbenzene) resin to obtain a novel diamide-based resin (PS–TMMA). PS–TMMA exhibited high adsorption capacity and selectivity toward TcO 4 − in 0.1–1 M HCl. The adsorption process of PS–TMMA conforms (Revise: conformed) to Langmuir isotherm and pseudo-second-order kinetics model. The results of column experiments revealed TcO 4 − can be completely separated from the coexisting fission products (Sr(II), Eu(III), Dy(III), and 1 M NH 3 ·H 2 O can re-collect TcO 4 − absorbed in the resin column. The adsorption mechanism of TcO 4 − is considered that PS–TMMA is converted into anion exchange resin in acidic condition.
研究领域:
化学工程
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核化学与放射化学
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DOI
高影响因子
Journal of Materials Chemistry B
·
2015
·Vol. 3
·期 31
·6528-6535
·
IF 4.726
Wei Liu,Jiangnan Zheng,Shihua Li,Ruirui Wang,Zian Lin,Huanghao Yang
Selective separation of intact phosphoproteins from complex biological samples is essential for ongoing, top-down phosphoproteomics but challenges still remain. Herein, aluminium glycinate functionalized silica nanoparticles (denoted as AGNP) were synthesized by a facile approach and applied for the specific capture of phosphoproteins. The selectivity and binding capacity of AGNP were evaluated using caseins (α-casein and β-casein) as phosphoproteins and bovine haemoglobin, bovine serum albumin, horseradish peroxidase, myoglobin and lysozyme as nonphosphoproteins. The results indicated that AGNP showed high binding capacity and selectivity for phosphoproteins (α-casein 1190 mg g−1 and β-casein 1060 mg g−1). In addition, AGNP was used to selectively capture and enrich phosphoproteins from protein mixtures and drinking milk samples. The good results demonstrate the potential of AGNP in phosphoproteomics analysis.
研究领域:
蛋白质组学
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纳米技术
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分析化学
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DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2017
·
IF 3.359
Yuehua Chen,Huiyong Wang,Yuanchao Pei,Jianji Wang
It is always difficult to separate scandium from yttrium and lanthanides due to their similar physicochemical properties. In this work, a selective separation strategy for Sc (III) from yttrium and lanthanides in aqueous solution was developed by using ionic liquids 1-alkylcarboxylic acid-3-methylimidazolium bis(trifluoromethanesulfonyl)imide ([(CH 2 ) n COOHmin][Tf 2 N]) (n = 3, 5, 7) as extractants and 1-alkyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide ([C n mim][Tf 2 N]) (n = 4, 6, 8, 10) ionic liquids as diluents. The extraction parameters such as phase valume ratio, equilibrium time, pH value of the aqueous phase, alkyl chain length of the extractants and diluents, and system temperature were investigated systematically. It was shown that the extraction efficiency of Sc (III) increased with the increase of aqueous phase pH value, and was as high as 99.5% at pH 4.2. Sc (III) could be extracted selectively from yttrium and lanthanides by simple tuning of pH value of the aqueous phase, and the separation factor was 10 3 . After the extraction, stripping of Sc (III) from the ionic liquids was attempted by using dilute aqueous HNO 3 . In addition, an ion exchange mechanism of the proton of extractants and the cation of the diluents was proposed from a series of control experiments. Since both the proton of the extractants and cation of the diluents participated in the extraction process, amount of the ionic liquids transferred to water phase can be greatly reduced compared with the cation exchange based metal extraction using only ionic liquid extractants.
研究领域:
化学工程
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材料科学
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DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2021
·
IF 3.764
Shahid Hussain,Haifeng Dong,Yanqiang Zhang,Guoxiong Zhan,Shaojuan Zeng,Huifang Duan,Xiangping Zhang
The efficient capture of carbon dioxide (CO2) has industrial, economic, and environmental significance. Here, CO2 capture performance in terms of CO2/CH4 selectivity for the zeolitic imidazolate framework (ZIF-8) is enhanced by impregnation of 1-n-butyl-3-methylimidazolium dicyanide [BMIM][DCA]. The preparation of ionic liquids (ILs)/ZIF-8 composites, their comprehensive characterization, and the impact of IL impregnation are all investigated. The crystal structure and morphology of ZIF-8 remained intact even after the impregnation of ILs, according to X-ray diffraction and scanning electron microscopy studies. The infrared spectroscopy known as Fourier transform infrared spectroscopy determines the interaction between ILs and ZIF-8 in the composite. The isotherm fitting was also performed by dual site Langmuir models, which showed good agreement with the experimental results. The CO2/CH4 selectivity results demonstrated that the ideal selectivity for the IL-impregnated ZIF-8 composite has five times higher selectivity than pristine ZIF-8 at 0.05 bar which is the highest reported selectivity. The normalized selectivity of this type of IL/ZIF-8 composite is also higher. This study suggested that the IL/MOF composite with a tunable structure have a strong potential for enhanced acid gas separation performance to meet the environmental challenges.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
Journal of Water Process Engineering
·
2023
·
IF 7
Haoran Dong,Shunyan Ning,Zengyuan Li,Sizhi Xu,Shichang Zhang,Xinpeng Wang,Youbin Wang,Lifeng Chen,Xiangbiao Yin,Toyohisa Fujita,Mohammed F. Hamza,Yuezhou Wei
Separation of palladium from high level liquid waste (HLLW) not only manages the dispose of HLLW, but could also aid in overcoming the shortage of palladium resources. Herein, three novel adsorbents, namely, 2-mercaptobenzimidazole (MBI)/XAD7HP, 2-mercaptobenzothiazole (MBT)/XAD7HP, 2-mercaptobenzoxazole (MBO)/XAD7HP were prepared by vacuum impregnation method using Amberlite XAD7HP resin (XAD7HP) as the carrier for the selective separation of Pd(II) from simulated HLLW. SEM-EDS (Scanning Electron Microscopy), BET (Brunauer-Emmett-Teller) and PXRD (Powder X-ray diffraction) analysis showed that the ligands were successfully impregnated into the carrier. The saturated adsorption capacities of MBI/XAD7HP, MBT/XAD7HP, MBO/XAD7HP in 0.5 M HNO 3 were 126.2 mg Pd/g, 137.6 mg Pd/g, 98.4 mg Pd/g, respectively, and excellent adsorption and separation performance towards Pd(II) ( SF Pd/other metals > 500 and K d > 10 4 mL/g from 0.1 to 4 M HNO 3 ) were also achieved. The adsorption kinetics and adsorption isotherms for Pd(II) matched well with pseudo-second-order kinetic model and Langmuir model, indicating that the adsorption for Pd(II) by three adsorbents were monolayer chemical adsorption . The adsorption mechanism was analyzed by FT-IR, XPS combined with DFT calculation. The extremely high selectivity of three adsorbents towards Pd(II) among 15 metal ions is due to the soft N and S donor atoms at ligands which have good affinity for Pd(II) in HNO 3 solution. As MBT/XAD7HP exhibited the best adsorption and separation properties, it is supposed to have more application potential for the separation of Pd(II) from HLLW.
研究领域:
化学工程
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环境科学
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材料科学
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DOI
高影响因子
Materials Today Nano
·
2023
·
IF 10.3
Jing Yan,Faguang Ma,Yilin Wu
Molecularly imprinted membranes have superior selective separation capacity, rebinding capacity, and flux due to their microporous substrates and tightly packed molecularly imprinted polymers . In current study, artemisinin (Ars), the most effective antimalarial drug , is used as template molecule. The permeation-selectivity wooden membranes based on Ars-imprinted nanocages designed by metal organic framework@carbon nitride self-assembly process (MDWMs) has been successfully prepared: (i) based on three-dimensional mesoporous basswood membranes, dopamine-based auto-polymerization process was developed on basswood to for harvest the first layer imprinting and secondary reaction platform. (ii) The two-dimensional sheet carbon nitride modified by metal-organic framework is stably loaded on the surface of the polydopamine-modified basswood membrane, providing a rich irregular point array structure for the formation of recognition sites. Based on elaborate designs and optimizations, selectivity , rebinding capabilities, and flux are enhanced on the developed MDWMs ( β Are/Ars = 6.49, β Aru/Ars = 4.22, β DH-Ars/Ars = 7.42), and high regeneration rate (>94% after 10 cycles) indicates that MDWMs have superior selectivity and stability. The MDWMs and preparation strategies developed here will provide a completely new design methodology for subsequent selective separation of Ars.
研究领域:
材料科学
·
药物化学
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环境工程
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DOI
高影响因子
CELLULOSE
·
2016
·Vol. 23
·期 6
·3785-3797
·
IF 3.195
Zhu Wenjing,Liu Lin,Liao Qian,Chen Xuan,Qian Zhouqi,Shen Junyan,Liang Junlong,Yao Juming
Cationic hyperbranched polyethylenimine (hPEI) was covalently linked onto the backbone of cellulose molecules via forming Schiff base structure between the amino groups of hPEI and the aldehyde groups on the chemically oxidized cellulose surface. The functionalized hPEI-CE possessed available active sites, and its adsorption behavior to anionic dye congo red (CR) and cationic basic yellow 28 (BY28) in aqueous solution was investigated. The hPEI-CE interacted with the two dyes, exhibiting sharp response to solution pH and ionic strength. The adsorption process was well dominated by the pseudo-second-order kinetic model. And the hPEI-CE following the Langmuir isotherm model, had a maximum adsorption capacity of 2100 mg g −1 for CR and 1860 mg g −1 for BY28, respectively. Further, the adsorption performance of six dyes onto the hPEI-CE was studied, which showed high adsorption capacities for CR, BY28, brilliant blue 133 (BB133), and reactive red, but very low adsorption for cationic bright yellow 7GL (7GL) and eosin Y (EY). The different adsorption performances for different dyes indicated the selective adsorption of the hPEI-CE for dyes owing to their different distribution coefficient ( K ) defining as the partition of dyes between hPEI-CE and water. Based on the unique selective adsorption, the mixtures of dyes, such as BB133-CR, BB133-BY28, BB133-7GL, and CR-7GL, were separated successfully using hPEI-CE.
研究领域:
材料科学
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环境科学
·
化学工程
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DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2025
·
IF 7.3
Zhuang Wang,Dongping Su,Ting Luo,Qiao Yu,Yiting Wang,Xingyue Liu,Xuanhao Huang,Songdong Ding
The separation of thorium from uranium and rare earths is of great significance for a thorium molten salt reactor nuclear energy system. Herein, a novel Aliquat 336@SiO2–P extraction resin, prepared by the in situ encapsulation of an amine-based ionic liquid (Aliquat 336) into a porous silica–polymer matrix at the same time as the polymerization, was developed for the highly selective separation of Th(IV) over U(VI) and rare earth ions. Batch adsorption studies showed that the prepared Aliquat 336@SiO2–P extraction resin has excellent selectivity, strong adsorption affinity, and high adsorption capacity for Th(IV). The adsorption process of Th(IV) follows pseudo-second-order kinetics and the Langmuir model, and the adsorption of Th(IV) is a monolayer-type, chemical, exothermic, and spontaneous process with increased entropy, achieving a maximum Th(IV) adsorption capacity (qmax) of 52.4 mg/g. Thorium is adsorbed as a complex anion in an HNO3 solution, and its adsorption conforms to the anion exchange mechanism. Furthermore, column experiments indicated that Th(IV) can be selectively separated from simulated monazite HNO3 leach liquor with a recovery rate as high as 97.7%, and the prepared extraction resin has good reusability. Compared to the conventional impregnation method, the Aliquat 336 extractant encapsulated in a porous silica–polymer matrix has significantly lower loss during the adsorption process. Overall, this new extraction resin demonstrates great application potential for the highly efficient separation and recovery of Th(IV) from monazite HNO3 leach liquor.
研究领域:
核能科学
·
材料科学
·
环境工程
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Qiao Zhang,Chunxi Hai,Zhiqiang Zhu,Xuemei Zhuo,Yanxia Sun,Shengde Dong,Luxiang Ma,Xin He,Qi Xu,Yuan Zhou
The layer-structured titanium oxide lithium ion sieve (TiO 2 ·H 2 O) is regarded as one of the most promising adsorbents for recovering Li + from low-grade brines with high Mg 2+ /Li + ratios and low lithium concentrations. This is due to its exceptional theoretical lithium adsorption capacity and outstanding stability. Nevertheless, its prolonged adsorption equilibrium time, frequently in excess of 72 h, has constrained its large-scale practical application, thus confining its utilization primarily to laboratory settings. To address this challenge, we have developed a Ce-doped TiO 2 ·H 2 O adsorbent through a simple in-situ calcination method. The as-prepared adsorbents have been shown to achieve a high adsorption capacity of up to 58.42 mg/g within 10 h in a 700 ppm LiOH solution, while exhibiting a very low Ti 4+ dissolution loss rate of around 0.6 %. It is noteworthy that the Ce doping process resulted in a 14 % enhancement in adsorption capacity, accompanied by a substantial improvement in the desorption/adsorption kinetics and selectivity of the TiO 2 ·H 2 O lithium adsorbents. In summary, this study presents a novel methodology for accelerating the Li + sorption in Ti–O frameworks derived from natural brines, which provides valuable insights for enhancing the practical applicability of TiO 2 ·H 2 O.
研究领域:
材料科学
·
环境科学
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Hang Cui,Jing Yan,Faguang Ma,Zequan Diao,Ming Yan,Yilin Wu,Jianming Pan
Here, ribavirin (RBV) was introduced into metal organic frameworks (MOFs) in this instance to direct the in situ fabrication of appropriate nanocage structures to facilitate the targeted binding of RBV. Well-designed nano-caged RBV imprinted membranes (NCRIMs) have remarkable antifouling capabilities and can selectively separate RBV from wastewater generated by the RBV production process by constructing imprinting sites inside the molecule. Polydopamine (PDA) is rich in hydrophilic groups (hydroxyl and amino groups) that interact with water molecules via hydrogen bonding, thereby generating a hydrate layer on the membrane surface. The synthesized RBV imprinted sites were homogeneously scattered at the interface and inside of the membrane, resulting in a satisfactory selectivity. Notably, methacrylic acid and acrylamide act as functional monomers that synergistically promote the ability to selectively recognise RBV imprinting sites. It was demonstrated that NCRIMs had favourable rebinding selectivity ( α RBV/ACV = 3.28, α RBV/AZT = 2.48, α RBV/LAM = 3.72) as well as partial selectivity ( β RBV /LAM = 9.48, β RBV/AZT = 8.20, β RBV/ACV = 2.95), indicating the potential of NCRIMs in practical application. What is significant is that the cooperative imprinting and modification methods devised in this study offer directions for the selective isolation of valuable components from complex environments, as well as a reference towards the design of potentially highly resistant membranes.
研究领域:
材料科学
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环境工程
·
药物化学
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DOI
高影响因子
TALANTA
·
2024
·
IF 5.6
Wei-Tao Li,Shuo Zhang,Huanhuan Guo,Ling Yu,Cuijuan Xing
As a new type of porous crystalline composite material, MOF-COF has shown great advantages in metal separation. Herein, a CoMOF-COF was designed for highly selective separation of trace Pb 2+ ions. The designed CoMOF-COF has a high density of nitrogen-oxygen functional groups and can selectively separate metal ions . There is a strong affinity between the designed CoMOF-COF material and metal Pb 2+ ions, which can be attributed to the ordered heterogeneous porous structure and large amounts of nitrogen-and oxygen-containing functional groups. The composite showed high adsorption selectivity for Pb 2+ ions and had adsorption capacity of 33 mg g −1 , with high chemical stability. Based on this solid phase extraction material, a high sensitivity detection method for Pb 2+ ions was established, which has the detection limit of 37.3 ng L −1 , precision of 1.9 %. Linear detection range is 0.2–10 ng mL −1 , and the detection of Pb 2+ ions in actual water samples was realized. Through this study, it is proved that the strong affinity between the designed CoMOF-COF materials and metal Pb 2+ ions can be attributed to the soft and hard acid-base theory, which reveals the structure-activity relationship between the porous heterostructure of such materials and metal separation, providing a highly selective separation material for the separation of other environmental pollutants .
研究领域:
材料科学
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环境科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）