Adsorptive removal of nickel and lead ions from aqueous solutions by poly (amidoamine) (PAMAM) dendrimers (<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" overflow="scroll" id="d1e2652" altimg="si42.gif"><mml:msub><mml:mrow><mml:mi mathvariant="normal">G</mml:mi></mml:mrow><mml:mrow><mml:mn>4</mml:mn></mml:mrow></mml:msub></mml:math>)

Ebrahimi, Roya; Hayati, Bagher; Shahmoradi, Behzad; Rezaee, Reza; Safari, Mahdi; Maleki, Afshin; Yetilmezsoy, Kaan

doi:10.1016/j.eti.2018.10.001

Cited by 27 publications

(6 citation statements)

References 29 publications

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“…Pollution of water resources due to the uncontrolled discharge of industrial wastewaters has become a global health and environmental concern 1 . Heavy metals are among the most important pollutants in industrial effluents due to their characteristics such as non-degradability, durability, aggregation, and toxicity 2 – 4 . Cadmium, chromium, copper, zinc, and nickel are among the most common heavy metals available in high concentrations in industrial wastewaters 5 , 6 .…”

Section: Introductionmentioning

confidence: 99%

Dual immobilization of magnetite nanoparticles and biosilica within alginate matrix for the adsorption of Cd(II) from aquatic phase

Safari

Rezaee

Soltani

et al. 2022

Sci Rep

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The adsorption of cadmium ions by magnetite (Fe3O4)@biosilica/alginate (MBA nano-hybrid) was the main aim of the present investigation. Herein, MBA nano-hybrid was synthesized via chemical precipitation technique. As-synthesized MBA nano-hybrid was characterized using FT-IR, FESEM and XRD analyzes. Based on the results, the maximum adsorption capacity of the adsorbent for the removal of Cd(II) was obtained at the initial pH of 7.0. At the initial Cd(II) concentration of 40 mg/L, increasing the reaction time to 180 min led to the Cd adsorption of 35.36 mg/g. Since the removal of Cd(II) after the reaction time of 60 min was insignificant, the reaction time of 60 min was considered as optimum reaction time for performing the experimental runs. According to the results, Langmuir isotherm and pseudo-second order kinetic models were the best fitted models with high correlation coefficients (R2 > 0.99). The results of thermodynamic study indicated exothermic (positive ΔH°) and spontaneous nature (negative ΔG°) of the adsorption of Cd(II) on the surface of MBA nano-hybrid. Negligible reduction in the adsorption capacity of the nano-hybrid was observed (16.57%) after fifth experimental runs, indicating high reusability potential of the as-synthesized nano-hybrid adsorbent.

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Section: Introductionmentioning

confidence: 99%

Dual immobilization of magnetite nanoparticles and biosilica within alginate matrix for the adsorption of Cd(II) from aquatic phase

Safari

Rezaee

Soltani

et al. 2022

Sci Rep

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“…Besides, the intensity of the peaks attributed to ν s (C−O−C), ν(C−C) and ν (C−O) stretching vibrations was increased. Finally, β‐CD‐PAMAM spectra (Figure 3 (C)) presented the characteristic peaks of modified β‐CD and most changes related to interactions between β‐CD and PAMAM components were observed with the appearing of two peaks at 1653 and 1573 cm −1 attributed to ν(C=O) and ν(N−H) stretching vibrations of amide groups from PAMAM structure [37].…”

Section: Resultsmentioning

confidence: 99%

β‐Cyclodextrin PAMAM Dendrimer Surface Doped with Silver and Hexacyanoferrate (III) and its Applications for Dopamine Detection in Synthetic Samples

et al. 2022

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A synthesis of β-cyclodextrin (β-Cd) functionalized with polyamide dendrimer PAMAM G.0 complexed with silver and potassium hexacyanoferrate (III) forming a mixed-valence complex (β-Cd-PAMAM-Ag/Fe) was proposed. This material was characterized by scanning electron microscopy (SEM), infrared spectroscopy (FT-IR), X-Ray diffraction (XRD), Energy Dispersion Spectroscopy (EDS) and Electron Paramagnetic Resonance (EPR). The hybrid complex was electrochemically investigated using cyclic voltammetry and some parameters (electrolyte, concentration of electrolyte, pH and scan rate) were evaluate in order to obtain optimum analytical responses. The β-Cd-PAMAM-Ag/Fe material was successfully applied in the electrocatalytic oxidation of dopamine (DOP) using Cyclic Voltammetry (CV) and Square Wave Voltammetry (SWV).

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“…Several alternative adsorptive materials have emerged, in the search to remove contaminants as efficiently as possible. Some reported adsorbents include: TiO 2 nanoparticles modified with poly(amidoamine) dendrimer [9], amino-functional poly(propylene imine) (PPI, G5) dendrimer linked silica (PPI/SiO 2 ) [10], poly(amidoamine) (PAMAM) dendrimers (generation 4: G4) [11], Fe 3 O 4 magnetic nanoparticles [12], nanoparticles [13], and ZIF-8 [14]. The use of clay to remove the heavy metals present in effluents has been studied by various authors due to its economic advantages [15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Removal of Pb2+ and Zn2+ using modified Chocolate B clay: a study using statistical analysis, equilibrium isotherms, and adsorption kinetics

2021

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In this work, natural and thermally modified Chocolate B clays were used for batch adsorption of Pb 2+ and Zn 2+ from an aqueous solution. The materials were characterized by X-ray diffraction, X-ray fluorescence spectroscopy, nitrogen adsorption, and cation exchange capacity. The tests were performed in a finite bath following a 2 2 factorial design, with the variables: pH and initial concentrations of metal. Results revealed that the thermal treatment caused alterations on the Chocolate B clay structure and decreased the specific surface area. Affinities between Pb 2+ or Zn 2+ and Chocolate B clay were found with adsorption capacities up to 3.36 and 3.72 mg.g -1 , respectively. The maximum adsorption capacities were 6.79 mg.g -1 for Pb 2+ and 3.35 mg.g -1 for Zn 2+ using thermally activated clay. The Langmuir and Freundlich models were used for the adsorption equilibrium analysis, and the Langmuir model provided the best fit for sorption isotherms. The adsorption kinetics was evaluated by two models: pseudo-first-order and pseudo-second-order. The pseudo-first-order kinetic model represented well the mechanism of interaction involved during Pb 2+ adsorption into the pores of the clay. However, the two models represented well the mechanism of interaction of Zn 2+ adsorption into the pores of the clay.

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Adsorptive removal of nickel and lead ions from aqueous solutions by poly (amidoamine) (PAMAM) dendrimers (G4)

Cited by 27 publications

References 29 publications

Dual immobilization of magnetite nanoparticles and biosilica within alginate matrix for the adsorption of Cd(II) from aquatic phase

Dual immobilization of magnetite nanoparticles and biosilica within alginate matrix for the adsorption of Cd(II) from aquatic phase

β‐Cyclodextrin PAMAM Dendrimer Surface Doped with Silver and Hexacyanoferrate (III) and its Applications for Dopamine Detection in Synthetic Samples

Removal of Pb2+ and Zn2+ using modified Chocolate B clay: a study using statistical analysis, equilibrium isotherms, and adsorption kinetics

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