Synthesis and characterization of Mg-Al layered double hydroxide intercalated with D2EHPA: Application for copper ions removal from aqueous solution

Rouahna, Noureddine; Ouakouak, Abdelkader; Srasra, Ezzeddine

doi:10.1016/j.jece.2018.01.036

Cited by 22 publications

(7 citation statements)

References 41 publications

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“…The first straight portion depicts the film diffusion mechanism that the dye molecules immediately enter the solid surface. The second and third portion represent the intraparticle diffusion mechanism and equilibrium condition, respectively [43,44]. Similar researches reported that the adsorption of dyes onto mineral clays involves the intraparticle diffusion mechanism [1,45].…”

Section: Kinetic Behaviorsmentioning

confidence: 89%

Development of a Novel Adsorbent Prepared from Dredging Sediment for Effective Removal of Dye in Aqueous Solutions

et al. 2021

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This study proposed a novel and low-cost adsorbent prepared from dredging sediment (DSD) for effective removal of dye in aqueous solutions. The adsorption efficiency and behavior of the DSD adsorbent toward the crystal violet (CV), a cationic dye, were investigated via batch experiments. The results showed that DSD samples contain mainly clay minerals (illite and kaolinite) and other mineral phases. In addition, DSD is a mesoporous material (Vmesopore = 94.4%), and it exhibits a relatively high surface area (~39.1 m2/g). Adsorption experiments showed that the solution’s pH slightly affects the adsorption process, and a pH of 11 gave a maximum capacity of 27.2 mg/g. The kinetic data of CV dye adsorption is well described by the pseudo–second-order and the Avrami models. The Langmuir and Liu isotherm models provide the best fit for the adsorption equilibrium data. The monolayer adsorption capacity of Langmuir reached 183.6, 198.0, and 243.6 mg/g at 293, 308, and 323 K, respectively. It was also found that the adsorption process was spontaneous (−ΔG°), exothermic (−∆H°), and increased the randomness (+∆S°) during the adsorption operation. The primary mechanisms in CV dye adsorption were ion exchange and pore filling, whereas electrostatic attraction was a minor contribution. In addition, three steps involving intraparticle diffusion occur at the same time to control the adsorption process. The results of this study highlight the excellent efficiency of DSD material as an ecofriendly sorbent for toxic dyes from water media.

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Section: Kinetic Behaviorsmentioning

confidence: 89%

Development of a Novel Adsorbent Prepared from Dredging Sediment for Effective Removal of Dye in Aqueous Solutions

et al. 2021

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“…835 cm −1 (ν 2 ), 667 cm −1 (ν 4 ) [24]. Bands at 558 cm −1 and 431 cm −1 can be attributed to the M-O and M-O-M stretching [25]. After calcination, all peaks characterizing the Zn-Al-CO 3 phase were decreased considerably ( figure 2(b)) [26,27].…”

Section: Kinetic and Equation Parametersmentioning

confidence: 99%

Zn-Al layered double hydroxide: synthesis, characterization and application for orthophosphates ions adsorption in aqueous medium

Rouahna

Ouakouak

Srasra

2020

Mater. Res. Express

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This paper aims at studying the preparation of Zn-Al-LDH anionic clay and its adsorption proprieties in removing orthophosphate ions from aqueous medium. The LDH phase was synthesized by coprecipitation method and then calcined at 500°C. Structural and textural properties of the prepared LDHs were determined by using x-ray diffraction, FTIR, BET, SEM and pH PZC analysis. Batch adsorption experiments were carried out under different parameters such as stirring time, pH and initial orthophosphate concentration. Results show that the prepared LDHs are efficient in removing orthophosphate and the maximum uptake was observed after 2 h. Experimental kinetic data are well described by the pseudo-second order model. It was also found that the adsorption process is significantly affected by the pH value. The sorption mechanisms include ion exchange, reconstitution of LDH phase and/or electrostatic attraction. Also, the isotherm study reveals that the Freundlich equation best fit the equilibrium data.

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“…To date, several techniques based on chemical precipitation, electrochemical processes, ion exchange, reverse osmosis [5], coagulation [6] and adsorption [7] have been investigated to remove Cu (II) ions from aqueous solutions. The latter is simple, available and recommended in the case of effluents with moderate and low Cu (II) concentrations [8]. In recent years, using clays such as sepiolite, zeolite, montmorillonite and smectite as low-cost adsorbent has attracted more attention among researches [9].…”

Section: Introductionmentioning

confidence: 99%

Adsorption characteristics of Cu (II) onto CaCl₂ pretreated algerian bentonite

Ouakouak

Rihani

Youcef

et al. 2020

Mater. Res. Express

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Calcium treated bentonite clay (CTBC) was prepared by CaCl 2 impregnation of Algerian bentonite clay. The prepared adsorbent was characterized and successfully used to remove Cu (II) ions from aqueous solutions at different conditions (pH, stirring time and initial copper concentration). Results showed that the raw bentonite was changed completely into Ca-bentonite, which exhibits a high adsorption capacity (qt=19.98 mg g −1 ) at pH=5.0. It appeared that the sorption mechanisms are simultaneous and strongly depend on pH value. In the pH range from 3-10, the removal of copper occurs mainly by ion exchange, surface metal complexation and precipitation of Cu (OH) 2 . It was also found that the experimental data of kinetic adsorption are well fitted by the pseudo-first order model. Equilibrium data obeyed the Langmuir isotherm with maximum adsorption capacity of 55.48 mg g −1 .The mean adsorption energy predicted by Dubinin-Radushkevich model (E=1.55 Kj/mol) shows the physical nature of the adsorption interactions. Results of this study suggest the potential of the prepared CTBC which can be used easily for fast decontamination of wastewater containing toxic metal ions.

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Synthesis and characterization of Mg-Al layered double hydroxide intercalated with D2EHPA: Application for copper ions removal from aqueous solution

Cited by 22 publications

References 41 publications

Development of a Novel Adsorbent Prepared from Dredging Sediment for Effective Removal of Dye in Aqueous Solutions

Development of a Novel Adsorbent Prepared from Dredging Sediment for Effective Removal of Dye in Aqueous Solutions

Zn-Al layered double hydroxide: synthesis, characterization and application for orthophosphates ions adsorption in aqueous medium

Adsorption characteristics of Cu (II) onto CaCl₂ pretreated algerian bentonite

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Synthesis and characterization of Mg-Al layered double hydroxide intercalated with D2EHPA: Application for copper ions removal from aqueous solution

Cited by 22 publications

References 41 publications

Development of a Novel Adsorbent Prepared from Dredging Sediment for Effective Removal of Dye in Aqueous Solutions

Development of a Novel Adsorbent Prepared from Dredging Sediment for Effective Removal of Dye in Aqueous Solutions

Zn-Al layered double hydroxide: synthesis, characterization and application for orthophosphates ions adsorption in aqueous medium

Adsorption characteristics of Cu (II) onto CaCl2 pretreated algerian bentonite

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Adsorption characteristics of Cu (II) onto CaCl₂ pretreated algerian bentonite