Fe/Co-chalcogenide-stabilized Fe3O4 nanoparticles supported MgAl-layered double hydroxide as a new magnetically separable sorbent for the simultaneous spectrophotometric determination of anionic dyes

Behbahani, Elham Sadati; Dashtian, Kheibar; Ghaedi, Mehrorang

doi:10.1016/j.microc.2019.104431

Cited by 35 publications

(13 citation statements)

References 51 publications

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“…The Langmuir, Freundlich, Temkin, and Dubinin–Radushkevich isotherm models were employed to explore the equilibrium data for the adsorption of AO and RB onto PAI/ZnS NC, according to previous reports. 21 –25 The equations and amounts of the parameters of these four isotherm models are represented in Table 1. The plots of the mentioned isotherms were signified in Figures 8 and 9 and the results exhibit that the equilibrium data with R 2 > 0.99 and maximum adsorption capacities of 70.92 (AO) and 91.74 (RB) mg g −1 fit well with the Langmuir adsorption isotherm.…”

Section: Resultsmentioning

confidence: 99%

“…To evaluate the mechanism adsorption of AO and RB by PAI/ZnS NC, four distinct kinetic models (pseudo-first order, pseudo-second order, intraparticle diffusion, and Elovich) were explored according to previous works. 21 –25 The equations and amounts of the various parameters of these kinetic models are represented in Table 2 and Figures 10 and 11. The attained results exhibit the adsorption kinetics to remove AO and RB by PAI/ZnS NC followed the pseudo-second order.…”

Section: Resultsmentioning

confidence: 99%

“…The removal capacity, q e (mg g −1 ), and removal percentage were calculated according to the previous reports. 21 –25…”

Section: Methodsmentioning

confidence: 99%

“…Among these methods, the adsorption technique offers the best results owing to its low cost, environmentally friendly, easy operation, simple design, insensitive to toxic substances, and lack of contaminant by-products. 21 –25 In adsorption technique designing a novel high surface adsorbent contains aromatic rings, functional groups and reactive sites to generate H-bonding, π – π stacking interaction, and electrostatic interaction with other aromatic-containing compounds with NH, OH, =O and SH groups as well as surface charged to realizes efficient capture, is very remarkable cases. Many adsorbents have been recognized to remove the dyes from the aqueous solutions.…”

Section: Introductionmentioning

confidence: 99%

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Chiral poly(amide-imide)/ZnS nanocomposite as a new adsorbent for simultaneous removal of cationic dyes from aqueous solution

Sadeghi

Rafiee

2020

High Performance Polymers

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A new adsorbent, poly(amide-imide)/zinc sulfide nanocomposite (PAI/ZnS NC), was fabricated and identified by Fourier-transform infrared spectroscopy, X-ray diffraction, energy-dispersive X-ray spectroscopy, field emission-scanning electron microscopy, and transmission electron microscopy. Then, the obtained NC was applied for the simultaneous removal of auramine O (AO) and rhodamine B (RB) dyes from aqueous solution via the interactions of hydrogen bonding, π– π stacking, and Lewis acid–base interaction. The effects of operational variables including pH, PAI/ZnS NC mass, AO and RB concentration, and sonication time on removal efficiency were examined and optimized values were found to be 8.0, 16 mg, 11 mg L−1, and 6 min, respectively. The adsorption capacities of PAI/ZnS NC for the removal of AO and RB dyes were found to be 70.92 and 91.74 mg g−1, respectively. Ultraviolet–visible spectrophotometer was used to determine the amount of residual dye in solution. Fitting the experimental equilibrium data to isotherm models such as Langmuir, Freundlich, Temkin, and Dubinin–Radushkevich reveals the suitability of the Langmuir model with high correlation coefficients ( R 2 = 0.998 for AO and R 2 = 0.999 for RB). Pseudo-first-order, pseudo-second-order, intraparticle diffusion, and Elovich kinetic models applicability was tested and the pseudo-second-order equation controls the kinetics of the adsorption process. Furthermore, this study establishes that PAI/ZnS NC can be successfully applied as a low-cost adsorbent and conserve its high efficiency after nine cycles for the removal of AO and RB dyes.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

“…The removal capacity, q e (mg g −1 ), and removal percentage were calculated according to the previous reports. 21 –25…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Chiral poly(amide-imide)/ZnS nanocomposite as a new adsorbent for simultaneous removal of cationic dyes from aqueous solution

Sadeghi

Rafiee

2020

High Performance Polymers

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“…As a growing trend, nanotechnology has attracted huge interest among scientists in various scientific fields such as catalysis [1][2][3], energy conversion and storage [4], sample preparation [5][6][7][8], and adsorption [9][10][11][12][13][14][15]. The great interest in the field of nanotechnology arises from the extraordinary physical, chemical, thermal, and mechanical characteristics of nanomaterials in comparison with large-size particles.…”

Section: Introductionmentioning

confidence: 99%

Itaconic acid-modified layered double hydroxide as a ‎novel adsorbent for effective removal of Congo red from aqueous solutions

Dinari¹,

Shabani²

2021

Preprint

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Herein, we report the synthesis of Cu-Ca-Al/NO3-based layered double hydroxide through co-precipitation methodology. The prepared layered double hydroxide was then modified with itaconic acid. The physicochemical properties of the prepared materials were studied using Fourier transform-infrared spectroscopy, scanning electron microscopy, X-ray diffraction analysis, thermogravimetric analysis, and nitrogen adsorption/desorption technique. The prepared materials were then applied as novel adsorbents for the removal of Congo red as a model of an anionic dye from aqueous media. To reach maximum adsorption, the effect of parameters including sample solution pH, adsorbent amount, contact time, and initial concentration of Congo red on the adsorption process was investigated. Kinetic studies were also conducted to study the mechanism of adsorption. In this regard, the kinetic models of pseudo-first-order, pseudo-second-order, Elovich, and intra-particle diffusion were studied. The results showed that the adsorption of Congo red onto Cu-Ca-Al-LDH and LDH-ITA adsorbents followed the pseudo-second-order kinetic model. To evaluate the equilibrium adsorption data, different isotherms including Langmuir, Freundlich, and Dubinin-Radushkevich were also applied. The data revealed that the Freundlich isotherm provided the best fit with the equilibrium data of both adsorbents. Maximum adsorption capacities of 81 and 84 mg g− 1 were obtained using Cu-Ca-Al-LDH and LDH-ITA adsorbents, respectively.

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Synthesis and characterization of layered double hydroxide decorated zeolite as the efficient sorbent for removal of toxic metal ions

Shamsayei

Yamini

Asiabi

2021

Env Prog and Sustain Energy

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Here is synthesized low-cost and green core-shell ZSM-5 zeolite@ layered double hydroxides (ZSM-5@LDH) via a simple in situ coprecipitation method. The structure of the sorbent was investigated using X-ray diffraction, scanning electron microscopy, Fourier transforms infrared, Brunauer-Emmett-Teller, Barret-Joyner-Halenderm, and transmission electron microscope. The ZSM-5@LDH was used for the removal of heavy metal ions include Pb(II), Zn(II), Cd(II), and Cu(II) and oxyanions include As(V), Cr(VI), Se(VI) from aqueous solutions. Synthesized sorbent showed selectivity for removing Pb(II) and As(V) ions. The kinetics models (pseudo-first-order and the pseudo-secondorder models) and adsorption isotherms models (Langmuir and Freundlich models) of sorbent were studied to evaluate the performance of their practical application. The ZSM-5@LDH for removal of Pb(II) and As(V) exhibits a high adsorption capacity (546.25 and 411.41 mg g À1 , respectively) and very high distribution coefficient (K d ) values (4.07Â 10 4 and 8.0 Â 10 6 ml g À1 , respectively), which place it at the top of materials known for the removal of Pb(II) and As(V). As a result, this study indicates that the ZSM-5@LDH may be an ideal material for the selective removal of Pb(II) and As(V).

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Fe/Co-chalcogenide-stabilized Fe3O4 nanoparticles supported MgAl-layered double hydroxide as a new magnetically separable sorbent for the simultaneous spectrophotometric determination of anionic dyes

Cited by 35 publications

References 51 publications

Chiral poly(amide-imide)/ZnS nanocomposite as a new adsorbent for simultaneous removal of cationic dyes from aqueous solution

Chiral poly(amide-imide)/ZnS nanocomposite as a new adsorbent for simultaneous removal of cationic dyes from aqueous solution

Itaconic acid-modified layered double hydroxide as a ‎novel adsorbent for effective removal of Congo red from aqueous solutions

Synthesis and characterization of layered double hydroxide decorated zeolite as the efficient sorbent for removal of toxic metal ions

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