SEPARATION AND PURIFICATION TECHNOLOGY
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2022
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IF 9.136
Yuanchao Pei,Yaxin Zhang,Jie Ma,Yang Zhao,Zhiyong Li,Huiyong Wang,Jianji Wang,Ran Du
Development of porous adsorption materials tethered with functional groups was favorable to establish a more efficient, stable and broad-spectrum metal ions removal strategy from water. In this work, carboxyl functional poly(ionic liquid)s@MOF composites were prepared through in situ polymerization of ILs monomers inside MOF pores. Their thermophysical property, structure and morphology were characterized by different techniques. These PILs@MOF composites were proposed as universal and efficient adsorbents to remove selected rare earth metal ions (La 3+ , Sm 3+ , Nd 3+ ) and heavy metal ions (Pb 2+ , Cd 2+ ) from water medium. Effect of pH value and composite dosage on the adsorption efficiency were studied in detail. The optimized adsorption efficiency as high as 99.8 % could be found for the selected metal ions by PIL@MIL-101. In addition, the isotherms, kinetics and thermodynamic parameters of the adsorption process were also determined, and these results imply that the Langmuir model and pseudo-second-order model fitted well with the experimental data. Thermodynamic parameters revealed spontaneous and exothermic nature of the adsorption process. A plausible mechanism for the adsorption process was suggested by the electrostatic interaction and coordination between the carboxyl group and metal ions with the aid of FTIR and XPS measurements. Finally, recycling experiments were performed to demonstrate the recyclability and stability of PIL@MOF composites undergoes at least five adsorption–desorption runs. The current research presented a series of poly(ionic liquid)s@MOF composites as a universal adsorption platform that demonstrated great potential for removing metal ions with remarkable efficiency.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
PURE AND APPLIED CHEMISTRY
·
2020
·Vol. 92
·期 10
·1683-1694
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IF 1.919
Di Duan,Baogen Su,Zongbi Bao,Qiwei Yang,Yiwen Yang,Qilong Ren
Various toxic metal ions were successfully removed from solid matrix into supercritical CO 2 (scCO 2 ) by open-chain crown ether bridged diphosphates at 313.15 K and 20 MPa, these diphosphates with different ester side chains and different length of ethylene oxide bridge group are highly soluble in supercritical CO 2 . The extraction efficiency ( E %) of heavy metals is between 55 and 89%. Mulliken charge distribution of ligand’s P=O coordination group was calculated to indicate the stability of metal complex. The ligand structure effects and the rationale for different selectivity were discussed. In addition, binding property of these diphosphates towards the alkaline earth metals was further studied following the same extraction procedures. Alkaline earth metal ions Ca 2+ , Sr 2+ and Ba 2+ were extracted with E % at 49–74%, 50–73% and 16–64%, respectively. DFT calculations were performed to investigate the interaction energy of the complexes and the correlation with the E % was discussed.
研究领域:
化学
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环境科学
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DOI
高影响因子
CRYSTENGCOMM
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2022
·Vol. 24
·期 20
·3749-3761
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IF 3.756
Mengya Li,Dandan Han,Junbo Gong
Uric acid (UA) is the end product of purine metabolism and is widely found in nature. Excess uric acid will result in the deposition of pathological uric acid crystals in the kidney. However, few studies have focused on the effects of components in the human body on the crystallization of uric acid. Herein, we found multiple effects of alkali metals (Na+, K+) on uric acid dihydrate (UAD) crystal growth, which is one of the main components of urinary stones. Optical microscopy (OM) and scanning electron microscopy (SEM) were employed to detect the crystal morphology, and long rod-like crystals and hierarchical crystals were found in the presence of Na+ and K+, respectively. Powder X-ray diffraction (PXRD) and micro-Raman spectroscopy verified that the crystal structure remained unchanged in the presence of ions. In addition, single-crystal growth experiments revealed that Na+ inhibited growth along [010] and [100], and K+ promoted growth along [100] but suppressed growth along [010]. The step growth of the UAD crystal was measured by atomic force microscopy (AFM), which indicated the inhibition of crystal growth by Na+ due to kink blocking, yet the promotion of crystal growth by K+ resulted from rough growth. Our studies showed that ions in the human body not only can maintain electrolyte balance but also can affect the crystallization of pathological crystals, which provides a suggestion for a rational diet for patients with hyperuricemia and urinary stones.
研究领域:
生物化学
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医学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2021
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IF 6.953
Die Wang,Luminita Marin,Xinjian Cheng
The detection of heavy metals, such as Hg 2+ and Fe 3+ , is of great significance. In this work, fluorescent small-molecule BODIPY (BY-3) bearing C C group was synthesized firstly. And then, the chitosan-based polymer sensor CY-1 was synthesized through the spontaneous NH 2 /C≡C click reaction. The synthesized CY-1 can effectively bind and recognize Hg 2+ /Hg + by the –C=N groups formed in the click reaction. Moreover, the macromolecular sensors CS-1 and CS-2 were synthesized by incorporating another recognition sites to CY-1. These synthesized macromolecular sensors can not only recognize Hg 2+ /Hg + , but also effectively recognize Fe 3+ /Fe 2+ . All of them exhibited significant quenching effect, visible to the naked eye under UV irradiation. The detection limit of CY-1 for Hg 2+ was 1.51 × 10 −6 mol/L, and the detection limit of CS-2 for Fe 3+ was 2.30 × 10 −6 mol/L. The BODIPY-chitosan sensors synthesized in this work have the functions of removing heavy metal ions besides the identifying ability. The maximum adsorption capacity of 1 g chitosan to Hg 2+ was 108 mg as the best one. This article provides a new method to prepare macromolecular sensors for the detection and removal of heavy metal ions. As a useful natural polymer, chitosan's application scope was enlarged.
研究领域:
化学传感器
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环境科学
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材料科学
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DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Pengfei Yang,Xiaozhe Hu,Jin Zhou,Haixiang Li,Asfandyar Shahab,Liangquan Lu,Hua Zhang
Given the severe threat posed by heavy metal pollution to both the ecological environment and human health, the development of green, efficient and sustainable adsorbents has become a major research focus. Herein, a novel heavy metal ions adsorbent (De-UiO-66-IDSA) was synthesized by functionalizing defect UiO-66 with the biodegradable chelating agent iminodisuccinic acid (IDSA). The effects of different factors on the adsorption of Pb 2+ , Cu 2+ and Cd 2+ by UiO-66-IDSA were investigated, including IDSA loading, contact time, adsorbent dosage and pH. Batch adsorption experiments showed that the adsorption kinetics followed PSO model, while the isotherm data were best described by the Langmuir model, indicating a monolayer chemisorption process. The maximum adsorption capacities for Pb 2+ , Cu 2+ and Cd 2+ were 377.40, 163.60, and 204.10 mg/g at 298 K, respectively and the adsorption was spontaneous and endothermic. Moreover, regeneration experiments demonstrated that the adsorbent retained over 75 % of its removal efficiency for all three metal ions after 5 cycles. These results highlight the great potential of De-UiO-66-IDSA as a green, high-performance, and a regenerable adsorbent capable of effectively eliminating heavy metal ions from aqueous media.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
CELLULOSE
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2013
·Vol. 20
·期 2
·849-860
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IF 3.476
Duan Chunting,Zhao Ning,Yu Xiaolan,Zhang Xiaoyan,Xu Jian
Kapok fiber, a natural hollow fiber with thin shell and large cavity, has rarely been used as adsorbent for heavy metal ions. In this paper, kapok fibers were modified with diethylenetriamine pentaacetic acid (DTPA) after hydrophilicity treatment. The adsorption behavior of the resultant kapok-DTPA influenced by pH, adsorption time and initial concentration of metal ion was investigated. The results demonstrate that adsorption equilibrium was reached within 2 min for Pb 2+ and Cd 2+ . Adsorption kinetics showed that the adsorption rate was well fitted by pseudo-second-order rate model. The adsorption isotherms were studied, and the best fit was obtained in the Langmuir model. The maximum adsorption capacities of kapok-DTPA were 310.6 mg g −1 for Pb 2+ , 163.7 mg g −1 for Cd 2+ , 101.0 mg g −1 for Cu 2+ , respectively. After eight desorption and re-adsorption loops, the lost adsorption capacities for Pb 2+ and Cu 2+ were less than 10 %. Because of the large specific area derived from the hollow fiber structure, kapok-DTPA exhibited much better adsorption capacity compared with many other reported adsorbents based on natural materials.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Jian Dong,Yi Wang,Liangliang Dong,Tatsuo Kaneko,Weifu Dong,Dongjian Shi,Mingqing Chen
Nanofiltration (NF) membrane technology holds unique application potential in the metal ion separation due to its high efficiency and low cost. However, the present NF membranes are facing the contradictory challenge of high water permeance and efficient separation for metal ions. In this study, we reported a NF membrane fabricated by amine-rich polymer polyethyleneamine (PVAm) with sodium lauryl sulphate (SDS) as the aqueous phase additive via reversed interfacial polymerization (IP). Based on the polymerization strategy and the role of amine groups and SDS, the fabricated membranes showed thinner and denser selection layer with positively-charged surface. Moreover, the membrane exhibited high water permeance (14.7 L m -2 h −1 bar −1 ), as well as excellent rejection performance towards divalent metal ions, including significant Li + /Mg 2+ separation (selective factor of 12.1) and high rejection rates for metal ions (Co 2+ 96.5 % and Sr 2+ 93.4 %), which are higher than most reported NF membranes. We believe this research provides valuable insights for the application of NF membrane in the field of salt-lakes lithium extraction and nuclide management.
研究领域:
膜技术
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水处理
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分离科学
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材料科学
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化学工程
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DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2023
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IF 13.6
Xuejing Xiao,Ruixue Guo,Yumeng Qi,Junyan Wei,Nannan Wu,Shengnan Zhang,Ruijuan Qu
In this study, TiO 2 nanospheres prepared by the sol-gel method were found to efficiently catalyze the photodegradation of 1-butyl-2,3-dimethylimidazolium bromide salt ([BMMIm]Br) under simulated solar irradiation through the main attack of hydroxyl radicals (•OH). The promoting effect of alkali metal (Li + →Cs + ) and alkaline earth metal ions (Mg 2+ →Ba 2+ ) was particularly emphasized. In-situ EPR tests showed that the introduction of alkali and alkaline earth metal ions could enhance the formation of •OH thus leading to a 7%−30.3% increase in the degradation efficiency of. [BMMIm] + . Moreover, the removal efficiency of [BMMIm] + still reached > 96.19% in four real waters. A total of 23 products of [BMMIm]Br were detected, and hydroxyl substitution, bond breaking, direct oxidation and ring opening were considered as the main reactions during the photocatalytic degradation process. The results of toxicity evaluation showed that hydroxylation was a reaction process of increasing toxicity, while the bond breaking reaction had great detoxification capacity for [BMMIm] + . These findings may enhance our understanding on the effects of alkali or alkaline earth metal ions on the photocatalytic activity of TiO 2 , which could also provide reference for the efficient and green removal of alkylimidazolium ionic liquids in waters.
研究领域:
环境科学
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材料科学
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化学
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DOI
PubMed
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
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2025
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IF 4.7
Luyue Wang,Yuzhu Chen,Zhengyang Xing,Jie Ma
Real-time monitoring of metal ion species and concentrations in water is a highly active research field. In the paper, a novel fluorescent molecule, (E)-N'-((5-(9-phenyl-9H-carbazol-3-yl) thiophen-2-yl) methylene) terephthalohydrazide (PCTMT), is synthesized via Suzuki reaction and Schiff-base reaction in turn. In the DMF-H 2 O (70 % v/v) solvent system, the PCTMT presents a good aggregation-induced enhancement (AIE) fluorescent effect and good selectivity and anti-interference for monitoring Co 2+ and Cu 2+ in water with a wide pH range. The probe's detection limit (LOD) reached 28.2 nM and 38.7 nM for Co 2+ and Cu 2+ , respectively. The binding constants between PCTMT and Co 2+ and Cu 2+ are calculated as 1.8 ×10 17 M -2 and 2.3 ×10 16 M -2 , at a 2:1 mol ratio. In the probe system, Co 2+ and Cu 2+ can be distinguished by oxalate titration. The detection mechanism is discussed through testing analyses with the theoretical simulation calculation via the density functional theory (DFT) and time-dependent density functional theory (TD-DFT). The probe also indicates good detection capacities in real water samples. This study may promote the development of coordinated-type ion probes and innovation in water quality detection technology.
研究领域:
分析化学
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环境科学
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DOI
高影响因子
MICROCHIMICA ACTA
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2024
·Vol. 191
·期 9
·1-15
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IF 5.3
Guo Jieli,Li Jin,Xing Xiujing,Xiong Wei,Li Hao
As an ideal transition metal oxide, Co 3 O 4 is a P-type semiconductor with excellent electrical conductivity, non-toxicity and low cost. This work reports the successful construction of Co 3 O 4 materials derived from metal-organic frameworks (MOFs) using a surfactant micelle template-solvothermal method. The modified electrodes are investigated for their ability to electrochemically detect Pb 2+ and Cu 2+ in aqueous environments. By adjusting the mass ratios of alkaline modifiers, the morphological microstructures of Co 3 O 4 -X exhibit a transition from distinctive microspheres composed of fiber stacks to rods. The results indicate that Co 3 O 4 -1(NH 4 F/CO(NH 2 ) 2 = 1:0) has a distinctive microsphere structure composed of stacked fibers, unlike the other two materials. Co 3 O 4 -1/GCE is used as the active material of the modified electrode, it shows the largest peak response currents to Pb 2+ and Cu 2+ , and efficiently detects Pb 2+ and Cu 2+ in the aqueous environment individually and simultaneously. The linear response range of Co 3 O 4 -1/GCE for the simultaneous detection of Pb 2+ and Cu 2+ is 0.5–1.5 μM, with the limits of detection (LOD, S/N = 3) are 9.77 nM and 14.97 nM, respectively. The material exhibits a favorable electrochemical response, via a distinctive Co 3 O 4 -1 microsphere structure composed of stacked fibers. This structure enhances the number of active adsorption sites on the material, thereby facilitating the adsorption of heavy metal ions (HMIs). The presence of oxygen vacancies (O V ) can also facilitate the adsorption of ions. The Co 3 O 4 -1/GCE electrode also exhibits excellent anti-interference ability, stability, and repeatability. This is of great practical significance for detecting Pb 2+ and Cu 2+ in real water samples and provides a new approach for developing high-performance metal oxide electrochemical sensors derived from MOFs. Graphical abstract
研究领域:
材料科学
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电化学
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产品关联
DOI
PubMed
高影响因子
CARBOHYDRATE POLYMERS
·
2013
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IF 3.479
Yinhui Li,Shudong Lin,Jiwen Hu,Guojun Liu,Gangwei Zhang,Yuanyuan Tu,Hongsheng Luo,Wei Li
Cu 2+ /amylose assemblies of various sizes were prepared through the Cu 2+ ion induced-assembly of amylose. These assembly structures were characterized via transmission electronic microscopy (TEM), scanning electronic microscopy (SEM), dynamic light scattering (DLS), 1 H NMR analysis, fluorescence spectroscopy (FL) and UV–vis absorption spectroscopy (UV–vis). The results from these characterizations revealed the existence of a complexation effect and/or a bridging effect between the hydroxyl groups of amylose and Cu 2+ ions, and that the formation of the hydrophobic domains promoted the formation of Cu 2+ /amylose assemblies. The use of other metal ions to induce the formation of spherical, flower- and wire-like amylose assemblies was investigated as well. A preliminary investigation on the ability of amylose to capture various metal ions was also performed, and the results of this work demonstrated that amylose could bind quantitatively metal ions that were at low concentrations. This work provided an alternative strategy for the recovery of precious metals from metal ion-containing aqueous solutions and the reduction of water pollution.
研究领域:
生物化学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CELLULOSE
·
2021
·Vol. 29
·期 2
·941-952
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IF 5.044
Hu Tao,Hu Xiaoli,Tang Cheng,Liu Dan
This paper describes the synthesis of a novel chelating material derived from cellulose, and its heavy metal ion adsorption properties from aqueous solution. The first section of this paper reports the chemical grafting of cellulose, that amino acetic acid groups were grafted onto the cellulose by in situ synthesis, a novel yet unreported modified cellulose derivative N,N-(dicarboxymethylaminoethyl, carboxymethyl)aminoethylamine carboxymethyl cellulose amide was synthesized. This obtained adsorbent was characterized by elemental analysis, infrared spectroscopy (IR) and Solid State Nuclear Magnetic Resonance (SSNMR) 13 C NMR spectroscopy. In the second section, the adsorption of Cu 2+ and Pb 2+ from single metal ion aqueous solutions onto this adsorbent were evaluated and analyzed by the Freundlich and Langmuir models. Further more, adsorption capacity for Ba 2+ , Mg 2+ , Mn 2+ , Co 2+ , Zn 2+ , Pb 2+ , Ni 2+ and Cu 2+ , and the competitive adsorption of this adsorbent between ions were also evaluated by ICP spectroscopy. The results indicated that this modified cellulose exhibited adsorption properties similar to those of EDTA, and showed good adsorption capacity for a wide range of metal ions.
Graphical abstract
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）