Schiff base anchored on metal-organic framework for Co (II) removal from aqueous solution

Yuan, Guoyuan; Yin, Tian; Li, Jun; Tu, Hong; Liao, Jiali; Yang, Jijun; Yang, Yuanyou; Wang, Dongqi; Liu, Ning

doi:10.1016/j.cej.2017.06.024

Cited by 107 publications

(28 citation statements)

References 53 publications

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“…For example, Li et al grafted mercaptoacetic acid onto In–MOF (SH-MIL-68) using the amide reaction of −NH 2 and −COOH for mercury adsorption from aqueous solutions, and the maximum adsorption amount could reach 450 mg g –1 . Yuan et al modified the Schiff base (−CHN−) in the pores of UiO-66–NH 2 by the condensation reaction of −NH 2 and −CHO, showing excellent adsorption ability on cobalt ions with a maximum capacity of 256 mg g –1 . Wu et al have successfully prepared a versatile adsorbent UiO-66-EDTA by introducing ethylenediaminetetraacetic acid (EDTA) into the pores of UiO-66, revealing excellent removal capability of diverse heavy metal ions owing to its hard and relatively softer chemical characteristics.…”

Section: Introductionmentioning

confidence: 99%

Removal of Co(II) from Aqueous Solutions by Pyridine Schiff Base-Functionalized Zirconium-Based MOFs: A Combined Experimental and DFT Study on the Effect of ortho-, meta-, and para-Substitution

Zeng

Lan

et al. 2020

J. Chem. Eng. Data

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A comparative study on the ortho-, meta-, and para-substituted pyridyl groups on the functional motifs of zirconium-based metal–organic frameworks (MOFs) for removing cobalt ions from aqueous solutions was performed. The maximum adsorption capacity of cobalt ions on the ortho-substituted MOF was estimated to be 100.0 mg g–1 at pH 8.0, which was much higher than those of meta- and para-substituted MOFs. The thermodynamic and kinetic experiments showed that the adsorption was a spontaneous, endothermic, and pseudo-second-order process. The modified MOFs were also demonstrated to have the outstanding regenerated ability by the reusability study. The adsorption mechanism probed by density functional theory calculations indicated that the ortho-substituted pyridine Schiff base can take cobalt ions from both [Co(H2O)6]2+ and [Co(CHES)·(H2O)4]+ to form the bidentate complex [CoLP2·(H2O)4]2+, whereas only monodentate complexes could be formed for the other two modified MOFs by substituting one water molecule of [Co·(H2O)6]2+, which were further confirmed by X-ray photoelectron spectroscopy. This work compares the removal performance of Co(II) from aqueous solutions by the ortho-, meta-, and para-substituted pyridine Schiff bases and provides a guiding route to design and synthesize effective functionalized MOFs for the removal of heavy metals and radionuclides.

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Section: Introductionmentioning

confidence: 99%

Removal of Co(II) from Aqueous Solutions by Pyridine Schiff Base-Functionalized Zirconium-Based MOFs: A Combined Experimental and DFT Study on the Effect of ortho-, meta-, and para-Substitution

Zeng

Lan

et al. 2020

J. Chem. Eng. Data

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“…The most recent trend in adsorbent material science are the so-called "low-cost" or "zero-cost" materials [13][14][15]. According to the literature, plenty of low-cost materials have already been tested in wastewater decontamination by adsorbing several pollutants, such as dyes [16][17][18][19], heavy metal ions [20][21][22][23][24][25], Equations (1) [43] and (2) [44], respectively (where I 002 (counts) was the intensity of the 002 crystalline peak at 22 • and I am (counts) was the height of the minimum between the 002 and 110 crystalline peaks):…”

Section: Introductionmentioning

confidence: 99%

Basic Dye Removal with Sorption onto Low-Cost Natural Textile Fibers

2018

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Over the last several years, the trend of researchers has been to use some very low-cost materials as adsorbents. For this purpose, some already commercially used bast fibers were selected as potential adsorbent materials to remove basic dye from synthetic effluents. The adsorption of basic yellow 37 dye was studied using three different bast fibers under the names of flax, ramie, and kenaf. Their morphological structure was examined using several techniques such as scanning electron microscopy (SEM), crystallinity, X-Ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR), as well as those characterizations being a useful tool to propose a mechanism of the whole adsorption process. The adsorption evaluation was achieved by studying at first the pH (12) and temperature effects (25–55 °C). Two isotherm models (Langmuir and Freundlich) were also applied to the experimental equilibrium data revealing the superiority of ramie fibers (327, 435, and 460 mg·g−1 (25 °C) for kenaf, flax, and ramie, respectively). The crucial adsorbent’s dosage was found to be 0.1 g per litre for all fibers, while the completed desorption study (eluant’s pH and reuse cycles) also confirmed the strong potential of these kinds of fibers as adsorbents. The latter may be attributed to the cellulosic content.

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“…0.998, which were higher than those of the Freundlich model (R 2 were 0.757-0.874), indicating that the adsorption of DMBP and DMPP on Cd(II) and Ni(II) might be monolayer and homogeneous(Yuan et al 2017). In this work, the values of Kc were 0.037-0.250 for DMBP and DMPP, and the values of RL were between 0-1, suggesting that the adsorption of Cd(II) and Ni(II) on both materials were favorable.…”

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confidence: 70%

Isotherm, Kinetics, and Adsorption Mechanism Studies of DTPA-Modified Banana/Pomegranate Peels as Efficient Adsorbents for Removing Cd(II) and Ni(II) from Aqueous Solution

Wang

Lin

et al. 2021

Preprint

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Two novel absorbents were synthesized for the first time by banana and pomegranate peels using diethylenetriaminepentaacetic acid (DTPA) modification to eliminate Cd(II) and Ni(II) of sewage. The DTPA-modified peels performed significantly higher adsorption capacity than unmodified materials. Adsorption isotherm and kinetics models were simulated to determine their removal efficiency and potential for recovery of these two heavy metals. As the results, the adsorption reached equilibrium within 5 minutes and was well described by the pseudo-second order model and Langmuir isotherm. The surface morphology analysis of the synthetic materials by Scanning Electron Microscopy-Energy Dispersive X-ray spectroscopy, Fourier Transform Infrared spectroscopy and X-ray Photoelectron Spectroscopy, implied that ion exchange, complexation and physical adsorption may together contribute to Cd(II) and Ni(II) loading on DTPA-modified peels. This study demonstrates the feasibility of waste peels as cost-efficient bio-absorbents to remove Cd(II) and Ni(II) in sewage systems, and discovers potential adsorption mechanism of efficiency improvements after DTPA modification.

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Schiff base anchored on metal-organic framework for Co (II) removal from aqueous solution

Cited by 107 publications

References 53 publications

Removal of Co(II) from Aqueous Solutions by Pyridine Schiff Base-Functionalized Zirconium-Based MOFs: A Combined Experimental and DFT Study on the Effect of ortho-, meta-, and para-Substitution

Removal of Co(II) from Aqueous Solutions by Pyridine Schiff Base-Functionalized Zirconium-Based MOFs: A Combined Experimental and DFT Study on the Effect of ortho-, meta-, and para-Substitution

Basic Dye Removal with Sorption onto Low-Cost Natural Textile Fibers

Isotherm, Kinetics, and Adsorption Mechanism Studies of DTPA-Modified Banana/Pomegranate Peels as Efficient Adsorbents for Removing Cd(II) and Ni(II) from Aqueous Solution

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