One- and two-dimensional carbon nanomaterials as adsorbents of cationic and anionic dyes from aqueous solutions

Pérez‐Ramírez, Eduardo E.; Luz‐Asunción, Miguel de la; Martínez-Hernández, Ana Laura; Rosa-Alvarez, Guadalupe de la; Fernández, Salvador; Salas, P.

doi:10.1007/s42823-019-00029-9

Cited by 14 publications

(9 citation statements)

References 38 publications

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“…Our investigation group has been using graphenic materials obtained from graphite with a high degree of graphitization as adsorbents with good results in the adsorption of dyes. 24,25 Due to the treatment needed to obtain the high degree of graphitization, this material is expensive and its application at industrial level is, therefore, not feasible. For the above reasons, the search for cheap graphenic materials is a necessity.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, the possibility of employing these graphenic adsorbents at the industrial level will be dependent on a number of factors, among which the cost is one of the most important. Our investigation group has been using graphenic materials obtained from graphite with a high degree of graphitization as adsorbents with good results in the adsorption of dyes 24,25 . Due to the treatment needed to obtain the high degree of graphitization, this material is expensive and its application at industrial level is, therefore, not feasible.…”

Section: Introductionmentioning

confidence: 99%

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High adsorption of methylene blue from water onto graphenic materials: Effect of degree of graphitization and analysis of kinetic models

Pérez‐Ramírez

Luz‐Asunción

Martínez-Hernández

et al. 2021

Env Prog and Sustain Energy

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The removal by adsorption of methylene blue dye from water using two-dimensional (2D) (graphene oxide and reduced graphene oxide) and three-dimensional (3D) (graphite and graphite oxide) carbon structures was studied. Two graphites with different degrees of graphitization were used to evaluate the significance of the carbon structural order in the adsorption efficiency, and therefore, the economic repercussions, because the degree of graphitization is related with the cost. Graphene oxides showed the best performance in methylene blue adsorption, with a removal of around 90%. The adsorption process was strongly influenced by the surface oxygenated groups, and electrostatic interaction was the main mechanism of adsorption.The degree of graphitization of the precursor does not have a strong influence on the adsorption results of methylene blue. Thus, graphene oxide with a lower degree of graphitization represents an economical and efficient adsorbent for the removal of methylene blue from water. The kinetic study was realized in pseudo-first order, pseudo-second order, and Elovich kinetic models in their linear and non-linear forms.According to the determination coefficient and the standard deviation, the experimental data were best fitted to the Elovich model in its non-linear form.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

High adsorption of methylene blue from water onto graphenic materials: Effect of degree of graphitization and analysis of kinetic models

Pérez‐Ramírez

Luz‐Asunción

Martínez-Hernández

et al. 2021

Env Prog and Sustain Energy

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“…Due to their characteristics of small size and higher surface area, nanomaterials have gained a lot of attention for their use on the removal of dyes. Carbon nanomaterials with graphitic structure have shown interesting results on the removal of dyes [25][26][27]. Graphene oxide, two-dimensional material considered as a functional form of graphene containing oxygen groups has shown good performance in the dyes removal [1,12,26,28,29].…”

Section: Introductionmentioning

confidence: 99%

“…The amount of surface oxygenated groups is an important parameter in the adsorption of dyes. High adsorption efficiencies have been achieved according to the nature of the dye [25].…”

Section: Introductionmentioning

confidence: 99%

Adsorption and kinetic study of Reactive Red 2 dye onto graphene oxides and graphene quantum dots

Luz‐Asunción

Pérez‐Ramírez

Martínez-Hernández

et al. 2020

Diamond and Related Materials

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“…This emerging research of Carbon nanotubes as an adsorbent for wastewater decontamination is attributable to its structural uniqueness comprising high porosity, hollow structure, and a large area of reaction [17]. The outer surface of individual nanotubes, the surface exterior where two adjacent parallel tubes meet, the groove which exists on the nanotube periphery bundles, the interstitial spaces between individual nanotubes in the bundles, and the cylindrical interior of individual nanotubes, are the numerous pores and sites available for the use of CNTs as an adsorbent for adsorption technique [18]. CNTs, alongside other adsorbents when compared, have a relatively larger surface area, high reactivity, photocatalytic activity, extraordinary surface morphology, an enormous number of active sites, and strong chemical and mechanical properties for its use as an adsorbent [19].…”

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confidence: 99%

Statistical analyses on effective removal of cadmium and hexavalent chromium ions by multiwall carbon nanotubes (MWCNTs)

Obayomi

Bello

Yahya

et al. 2020

Heliyon

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In this work, multiwall carbon nanotubes (MWCNTs) developed from cobalt-ferrite catalyst on activated carbon (from castor seed), was used as an adsorbent for the removal of cadmium and hexavalent chromium ions. The effectiveness of the adsorbent for the uptake of Cd(II) and Cr(VI)ions from aqueous solution was investigated in a process batch adsorption study. The developed activated carbon and MWCNTs were characterized by Brunauer-Emmett-Teller (BET) surface area analysis, Fourier Infrared Spectroscopy (FT-IR) and Scanning Electron Microscopy (SEM) for the determination of surface area, functional group, and surface morphology, respectively. The BET surface area of activated carbon and developed adsorbent from Co-Fe/AC was 230.24 and 372.42 m 2 /g, respectively. The operational parameters evaluated on the adsorption efficiency were solution pH, temperature, adsorbent dosage initial metal ions concentration, and contact time. The adsorption of Cd(II) and Cr(VI) were found to have attained equilibrium positions in 60 min for the concentration range tested, respectively. The four linearized adsorption isotherm models; Langmuir, Freundlich, Temkin and Dubinin Radushkevich (D-R) tested, when compared, revealed that Langmuir isotherm fitted well to the experimental data judging from the higher correlation coefficient values (R 2 ) and lower values of the error functions (chi-square (χ 2 ), the sum of square error (ERRSQ/SSE) and the sum of absolute error (EABS))with monolayer adsorption capacities of 404.858 and 243.902 mg/g for Cd(II) and Cr(VI) ions, respectively. Adsorption kinetic models investigated by pseudo-first-order, pseudo-second-order, Elovich, and intraparticle diffusion showed the conformity of pseudo-second-order model to the process adsorption as informed by the higher values R 2 and Adj, R 2 , maximum log-likelihood and smaller ERRSQ/SSE, χ 2 , Akaike information criterion (AIC), Bayesian information criterion (BIC), and Hannan-Quinn information criterion (HQIC). The intraparticle diffusion model plots indicated that intraparticle diffusion was not the only rate-limiting step. Thermodynamic adsorption parameters (ΔH o and ΔG o , ΔS o ) showed that the adsorption of Cd (II) and Cr (VI) ions was spontaneous, endothermic, and increased in randomness between the adsorbate-adsorbent. The mean adsorption energy (E), the heat of adsorption (ΔH o ), and activation energy (E a ) values, revealed the adsorption mechanism of Cd(II) and Cr(VI) onto MWCNTs as a combination of chemical and physical adsorption but dominated more by chemical adsorption. IntroductionWater is particularly important to the existence of living organisms in the world. However, human activities which include population growth, industrialization increase, and urbanization have caused rapid contamination, compromising the availability of potable water [1]. The release of harmful substances like heavy metals, due to human actions, has posed environmental problems, affecting human health [2,3]. Heavy metals like chromium and cadmium when exceed...

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One- and two-dimensional carbon nanomaterials as adsorbents of cationic and anionic dyes from aqueous solutions

Cited by 14 publications

References 38 publications

High adsorption of methylene blue from water onto graphenic materials: Effect of degree of graphitization and analysis of kinetic models

High adsorption of methylene blue from water onto graphenic materials: Effect of degree of graphitization and analysis of kinetic models

Adsorption and kinetic study of Reactive Red 2 dye onto graphene oxides and graphene quantum dots

Statistical analyses on effective removal of cadmium and hexavalent chromium ions by multiwall carbon nanotubes (MWCNTs)

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