Kinetic, equilibrium, adsorption mechanisms of cationic and anionic dyes on N-doped porous carbons produced from zeolitic-imidazolate framework

2022 ◽  
Author(s):  
D. T. C. Nguyen ◽  
D. V. N. Vo ◽  
T. T. Nguyen ◽  
T. T. T. Nguyen ◽  
L. T. T. Nguyen ◽  
...  
Keyword(s):  
Equilibrium Adsorption ◽  
Porous Carbons ◽  
Anionic Dyes ◽  
Zeolitic Imidazolate Framework ◽  
Adsorption Mechanisms ◽  
Kinetic Equilibrium

Fabrication of cellulosic paper containing zeolitic imidazolate framework and its application in removal of anionic dye from aqueous solution

BioResources ◽  
2021 ◽  
Vol 16 (2) ◽  
pp. 2644-2654
Author(s):  
Zicheng Chen ◽  
Huiwen Zhang ◽  
Xiangyang He ◽  
Guangyuan Fan ◽  
Xiaosong Li ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Functional Materials ◽  
Anionic Dyes ◽  
Zeolitic Imidazolate Framework ◽  
Cellulosic Fibers ◽  
Simple Filtration ◽  
Metal Organic ◽  
Potential Strategy ◽  
Cellulosic Paper

The combination of metal organic frameworks (MOFs) with other functional materials is a potential strategy for the preparation of advanced MOF-based materials. In this study, a simple approach is reported for the fabrication of cellulosic paper containing zeolitic imidazolate framework (ZIF-8) through in-situ loading in the papermaking process. The results showed that the ZIF-8 was evenly distributed in the paper substrate owing to the multi-layers structure of the cellulosic fibers, although the loading of the ZIF-8 particles on the single cellulosic fiber was nonuniform. The as-prepared ZIF-8 composites can be used as a highly efficient adsorbent material for anionic dyes in aqueous solution thanks to the positive charge on the surface of the ZIF-8 particles. More than 92% of the methyl orange (MO-) dye in the aqueous solution was rapidly removed through a simple filtration process using the ZIF-8 composite cellulosic paper (hand-sheets made in lab) when the content of ZIF-8 in cellulosic paper was high as 25.1%. In addition, the ZIF-8 composite paper had acceptable flexibility and could be reused at least 4 cycles by washing out the adsorbed dye.

Adsorption of Tetracyclin Hydrochloride from Aqueous Solutions on Activated Carbons

2019 ◽  
Vol 7 (3) ◽  
pp. 3-9
Author(s):  
Л. Григорьев ◽  
L. Grigorev ◽  
О. Шанова ◽  
O. Shanova ◽  
Л. Веренцова ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Aqueous Solutions ◽  
Kinetic Data ◽  
Activated Carbons ◽  
Sufficient Accuracy ◽  
Equilibrium Adsorption ◽  
Practical Application ◽  
Adsorption Activity ◽  
Two Samples ◽  
Kinetic Equilibrium

Have been studied kinetic, equilibrium, and dynamic conditions for adsorption of tetracycline hydrochloride from aqueous solutions on two samples of industrial activated carbons SKT and BAU-A. It has been determined that the kinetic data of adsorption can be approximated with sufficient accuracy by the Glückauf equation. To calculate tetracycline hydrochloride’s equilibrium adsorption, it has been proposed to use the Dubinin-Radushkevich equation, and to calculate the adsorption duration — the Dubinin-Nikolaev equation. The possibility for practical application of activated carbons for wastewater treatment from antibiotics has been demonstrated, and ways for increasing of these carbons’ adsorption activity have been proposed.

Modulation of the driving forces for adsorption on MIL-101 analogues by decoration with sulfonic acid functional groups: superior selective adsorption of hazardous anionic dyes

2020 ◽  
Vol 49 (20) ◽  
pp. 6651-6660
Author(s):  
Ji-Min Yang ◽  
Wei Zhang ◽  
Run-Zhi Zhang ◽  
Meng-Xuan Tong
Keyword(s):  
Functional Groups ◽  
Sulfonic Acid ◽  
Driving Forces ◽  
Selective Adsorption ◽  
Anionic Dyes ◽  
Adsorption Mechanisms ◽  
Adsorption Capacities

MIL-101-SO3H analogues functionalized with –SO3H groups exhibited superior CR, MO and AC adsorption capacities because of their distinct adsorption mechanisms.

scholarly journals Magnetic Porous Controlled Fe3O4–Chitosan Nanostructure: An Ecofriendly Adsorbent for Efficient Removal of Azo Dyes

Nanomaterials ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 1194 ◽  
Author(s):  
Tiago M. Freire ◽  
Lillian M. U. D. Fechine ◽  
Danilo C. Queiroz ◽  
Rafael M. Freire ◽  
Juliano C. Denardin ◽  
...  
Keyword(s):  
Azo Dyes ◽  
Average Particle Size ◽  
Molecular Size ◽  
Nitrogen Adsorption ◽  
Average Particle ◽  
Precipitation Reaction ◽  
Reactive Black 5 ◽  
Anionic Dyes ◽  
Adsorption Mechanisms ◽  
Surface Modified

In this work, chitosan/magnetite nanoparticles (ChM) were quickly synthesized according to our previous report based on co-precipitation reaction under ultrasound (US) irradiation. Besides ChM was in-depth structurally characterized, showing a crystalline phase corresponding to magnetite and presenting a spheric morphology, a “nanorod”-type morphology was also obtained after increasing reaction time for eight minutes. Successfully, both morphologies presented a nanoscale range with an average particle size of approximately 5–30 nm, providing a superparamagnetic behavior with saturation magnetization ranging from 44 to 57 emu·g−1. As ChM nanocomposites have shown great versatility considering their properties, we proposed a comparative study using three different amine-based nanoparticles, non-surface-modified and surface-modified, for removal of azo dyes from aqueous solutions. From nitrogen adsorption–desorption isotherm results, the surface-modified ChMs increased the specific surface area and pore size. Additionally, the adsorption of anionic azo dyes (reactive black 5 (RB5) and methyl orange (MO)) on nanocomposites surface was pH-dependent, where surface-modified samples presented a better response under pH 4 and non-modified one under pH 8. Indeed, adsorption capacity results also showed different adsorption mechanisms, molecular size effect and electrostatic attraction, for unmodified and modified ChMs, respectively. Herein, considering all results and nanocomposite-type structure, ChM nanoparticles seem to be a suitable potential alternative for conventional anionic dyes adsorbents, as well as both primary materials source, chitosan and magnetite, are costless and easily supplied.

Single and bicomponent anionic dyes adsorption equilibrium studies on magnolia-leaf-based porous carbons

RSC Advances ◽  
2015 ◽  
Vol 5 (79) ◽  
pp. 63970-63977 ◽  
Author(s):  
Huijing Yu ◽  
Tingting Wang ◽  
Wei Dai ◽  
Xianxing Li ◽  
Xin Hu ◽  
...  
Keyword(s):  
Porous Carbon ◽  
Adsorption Equilibrium ◽  
Porous Carbons ◽  
Anionic Dyes ◽  
Equilibrium Studies ◽  
New Type ◽  
Dyes Adsorption

A new type of porous carbon derived from magnolia leaf plays an important role in the adsorption of anionic dyes.

Pd nanoparticles supported on hierarchically porous carbons derived from assembled nanoparticles of a zeolitic imidazolate framework (ZIF-8) for methanol electrooxidation

2015 ◽  
Vol 51 (54) ◽  
pp. 10827-10830 ◽  
Author(s):  
Jun Li ◽  
Qi-Long Zhu ◽  
Qiang Xu
Keyword(s):  
Catalytic Activity ◽  
Pd Nanoparticles ◽  
Methanol Electrooxidation ◽  
High Catalytic Activity ◽  
Porous Carbons ◽  
Zeolitic Imidazolate Framework ◽  
Hierarchically Porous

Pd nanoparticles supported on hierarchically porous carbons prepared by carbonization of assembled ZIF-8 nanoparticles at 1000 °C display an extremely high catalytic activity for methanol electrooxidation.

Superior adsorptive removal of anionic dyes by MIL-101 analogues: the effect of free carboxylic acid groups in the pore channels

CrystEngComm ◽  
2019 ◽  
Vol 21 (38) ◽  
pp. 5824-5833 ◽  
Author(s):  
Ji-Min Yang ◽  
Run-Zhi Zhang ◽  
Ying-Yan Liu
Keyword(s):  
Carboxylic Acid ◽  
Anionic Dyes ◽  
Adsorption Mechanisms ◽  
Adsorptive Removal ◽  
Carboxylic Acid Groups ◽  
Adsorption Capacities

MIL-101-COOH nanoparticles functionalized with free carboxylic acid groups exhibited superior CR, MO, and AC adsorption capacities via their distinctive adsorption mechanisms.

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