Selective adsorption and separation of toxic cationic dyes using hierarchically porous SDBS modified vaterite microspheres (Hr-SMV)

Nagpal, Mudita; Kakkar, Rita

doi:10.1016/j.jpcs.2020.109598

Cited by 23 publications

(11 citation statements)

References 51 publications

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“…16) ). These results in multilayers of MO formed on the surface of the adsorbent [30], which agrees with the adsorption results (Table 5) [40][41][42][43]46]. [40][41][42][43][44].…”

Section: Ternary Adsorption Isotherm Studiessupporting

confidence: 89%

Selective and Highly Efficient Adsorption of a Mixture of Anionic and Cationic Dyes as Synthetic Wastewater Absorbents on Layered Double Hydroxide: Experimental and Computational Studies

Mahmoud

Taha

Zaher

et al. 2021

Preprint

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Background: In the current work, the removal of cationic and anionic dyes from water was studied both experimentally and computationally. We examine the selectivity of the adsorbent, Zn–Fe layered double hydroxide (LDH) toward three cationic and anionic dyes. Methods: The chemical and physical properties of the prepared adsorbent before and after adsorption were investigated using FT-IR, X-ray diffraction, zeta potential, energy dispersive X-ray, X-ray photoelectron spectroscopy, particle size, HRTEM, and FESEM analysis; optical and electric properties were estimated. The influence of pH on the adsorption process was estimated. Monte Carlo simulations were performed to understand the adsorption mechanism and compute the adsorption energies.Significant Findings: Single dye adsorption tests revealed that Zn–Fe LDH effectively takes up anionic methyl orange (MO) more than the cationic dyes methylene blue (MB) and malachite green (MG). From MO/MB/MG mixture experiments, LDH selectively adsorbed in the following order: MO>MB>MG. The adsorption capacity of a single dye solution was 230.68, 133.29, and 57.34 mg/g for MO, MB, and MG, respectively; for the ternary solution, the adsorption capacity was 217.97, 93.122, and 49.57 mg/g for MO, MB, and MG, respectively. Zn–Fe LDH was also used as a photocatalyst, giving 92.2% and 84.7% degradation at concentrations of 10 and 20 mg/L, respectively.

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“…16) ). These results in multilayers of MO formed on the surface of the adsorbent [30], which agrees with the adsorption results (Table 5) [40][41][42][43]46]. [40][41][42][43][44].…”

Section: Ternary Adsorption Isotherm Studiessupporting

confidence: 89%

Selective and Highly Efficient Adsorption of a Mixture of Anionic and Cationic Dyes as Synthetic Wastewater Absorbents on Layered Double Hydroxide: Experimental and Computational Studies

Mahmoud

Taha

Zaher

et al. 2021

Preprint

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show abstract

“…As shown from the calculated parameters (Table 3 ) and the isotherm plots for dye adsorption (Fig. 14 ), the Langmuir–Freundlich isotherm model better explains dye adsorption on LDH, indicating multilayer adsorption in the following order: MO > MB > MG. MB and MO are flat and slightly hydrophobic molecules with rigid heterocyclic aromatic rings 48 . Hydrophobic interactions lead to a strong tendency of MO and MB to form dimers and trimers (the dimerization of MO and MB were 3.96 and 2.38, respectively 49 ).…”

Section: Resultsmentioning

confidence: 99%

Understanding the physicochemical properties of Zn–Fe LDH nanostructure as sorbent material for removing of anionic and cationic dyes mixture

Mahmoud

Taha

Zaher

et al. 2021

Sci Rep

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In our work, the removal of cationic and anionic dyes from water was estimated both experimentally and computationally. We check the selectivity of the adsorbent, Zn–Fe layered double hydroxide (LDH) toward three dyes. The physical and chemical properties of the synthesis adsorbent before and after the adsorption process were investigated using X-ray photoelectron spectroscopy, energy dispersive X-ray, X-ray diffraction, FT-IR, HRTEM, and FESEM analysis, particle size, zeta potential, optical and electric properties were estimated. The effect of pH on the adsorption process was estimated. The chemical stability was investigated at pH 4. Monte Carlo simulations were achieved to understand the mechanism of the adsorption process and calculate the adsorption energies. Single dye adsorption tests revealed that Zn–Fe LDH effectively takes up anionic methyl orange (MO) more than the cationic dyes methylene blue (MB) and malachite green (MG). From MO/MB/MG mixture experiments, LDH selectively adsorbed in the following order: MO > MB > MG. The adsorption capacity of a single dye solution was 230.68, 133.29, and 57.34 mg/g for MO, MB, and MG, respectively; for the ternary solution, the adsorption capacity was 217.97, 93.122, and 49.57 mg/g for MO, MB, and MG, respectively. Zn–Fe LDH was also used as a photocatalyst, giving 92.2% and 84.7% degradation at concentrations of 10 and 20 mg/L, respectively. For visible radiation, the Zn–Fe LDH showed no activity.

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“…HCl modification could corrode the surface of OBDCA to generate more adsorption sites for RhB adsorption. However, barite, vaterite, and other impurities in OBDCA, which could also adsorb the dye at a certain degree, were also reduced after HCl modification. − The H 3 PO 4 and H 2 O 2 modification could oxidize and corrode the surface of OBDCA with relatively intact retention of barite and vaterite. In addition, among the three MOBDCA, M3-OBDCA had the lowest BET surface area and the optimal adsorption efficiency for RhB, which could indicate that the H 2 O 2 modification could enhance the hydrophilicity and affinity of OBDCA for RhB …”

Section: Resultsmentioning

confidence: 99%

Enhanced Adsorption of Rhodamine B on Modified Oil-Based Drill Cutting Ash: Characterization, Adsorption Kinetics, and Adsorption Isotherm

Zhao

Sun

et al. 2021

ACS Omega

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In this paper, phosphoric acid (H 3 PO 4 ), hydrochloric acid (HCl), and hydrogen peroxide (H 2 O 2 ) were employed for the modification of oil-based drill cutting ash (OBDCA) for the first time. The adsorption of rhodamine B (RhB) on modified oilbased drill cutting ash (MOBDCA) in an aqueous medium was investigated. H 2 O 2 -modified OBDCA had the optimal adsorption efficiency for RhB. The physical and chemical properties of MOBDCA were analyzed using X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), ζ-potential, N 2 adsorption−desorption isotherm, and pore size distribution. The effect of the pH value (3−11), reaction time (10−720 min), and initial RhB concentration (10−200 mg/ L) on RhB adsorption was discussed. The adsorption kinetics highly fitted with the pseudo-second-order model (R 2 > 0.99), which indicated that the adsorption process was dominated by chemisorption. The adsorption isotherm fitted well with the Langmuir and Freundlich models (R 2 > 0.97), which indicated the monolayer adsorption process and the heterogeneous adsorption process, respectively. The theoretic adsorption capacity (50 mg/g) for RhB was achieved by H 2 O 2 -modified OBDCA. This paper provides a promising method of resource utilization of OBDCA to treat organic pollutants.

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Selective adsorption and separation of toxic cationic dyes using hierarchically porous SDBS modified vaterite microspheres (Hr-SMV)

Cited by 23 publications

References 51 publications

Selective and Highly Efficient Adsorption of a Mixture of Anionic and Cationic Dyes as Synthetic Wastewater Absorbents on Layered Double Hydroxide: Experimental and Computational Studies

Selective and Highly Efficient Adsorption of a Mixture of Anionic and Cationic Dyes as Synthetic Wastewater Absorbents on Layered Double Hydroxide: Experimental and Computational Studies

Understanding the physicochemical properties of Zn–Fe LDH nanostructure as sorbent material for removing of anionic and cationic dyes mixture

Enhanced Adsorption of Rhodamine B on Modified Oil-Based Drill Cutting Ash: Characterization, Adsorption Kinetics, and Adsorption Isotherm

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