Kinetics, Isotherms, and Thermodynamic Modeling of the Adsorption of Phosphates from Model Wastewater Using Recycled Brick Waste

Edet, Uduakobong A.; Ifelebuegu, Augustine O.

doi:10.3390/pr8060665

Cited by 244 publications

(127 citation statements)

References 36 publications

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“…However, the well-fitting of the Bangham model ( Fig. 2f ) is indicating the presence of pore diffusion in the adsorption process [39]. The presence of this pore diffusion is also consistent with the BET and SEM interpretations.…”

Section: Methylene Blue Dye Adsorptionsupporting

confidence: 86%

Multifunctional application of PVA-aided Zn–Fe–Mn coupled oxide nanocomposite

2021

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Zinc oxide (ZnO) is a fascinating semiconductor material with many applications such as adsorption, photocatalysis, sensor, and antibacterial activities. By using a poly (vinyl alcohol) (PVA) polymer as a capping agent and metal oxides (iron and manganese) as a couple, the porous PVA-aided Zn/Fe/Mn ternary oxide nanocomposite material (PTMO-NCM) was synthesized. The thermal, optical, crystallinity, chemical bonding, porosity, morphological, charge transfer properties of the synthesized materials were confirmed by DTG/DSC, UV–Vis-DRS, XRD, FT-IR, BET, SEM-EDAX/TEM-HRTEM-SAED, and CV/EIS/amperometric analytical techniques, respectively. The PTMO-NCM showed an enhanced surface area and charge transfer capability, compared to ZnO. Using the XRD pattern and TEM image analysis, the crystalline size of the materials was confirmed to be in the nanometer range. The porosity and superior charge transfer capabilities of the PTMO-NCM were confirmed from the BET, HRTEM (IFFT)/SAED, and CV/EIS analysis. The adsorption kinetics (adsorption reaction/adsorption diffusion) and adsorption isotherm test confirmed the presence of a chemisorption type of adsorbate/methylene blue dye-adsorbent/PTMO-NCM interaction. The photocatalytic performance was tested on the Congo red and Acid Orange-8 dyes. The superior ascorbic acid sensing capability of the material was understood from CV and amperometric analysis. The noble antibacterial activities of the material were also confirmed on both gram-negative and gram-positive bacteria.

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Section: Methylene Blue Dye Adsorptionsupporting

confidence: 86%

Multifunctional application of PVA-aided Zn–Fe–Mn coupled oxide nanocomposite

2021

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“…Pseudo second-order kinetics model (Equation ( 7)) could be linearized up to five different linear forms [36]. Regression using the linear form given in Equation ( 9) is the most used for phosphate kinetic studies [7][8][9][10]15]. This linear form could predict q e very well, but several references [36][37][38] indicate that this linearization could be inappropriate to obtain a good value of k 2 and the initial adsorption rate value (k 2 •qe 2 ).…”

Section: Batch Adsorption Proceduresmentioning

confidence: 99%

“…Several Circular Economy approaches applied to the adsorption of phosphate have been considered in the literature. These alternatives include the recovery of phosphorus and water from several wastewater streams [1][2][3][4], the use of low-cost products or recovered waste as sorbents [5][6][7][8][9][10][11], and the study of the re-use of phosphate-loaded sorbents [2,3,[11][12][13]. To develop these strategies, it is paramount to optimize the performance of the sorption process.…”

Section: Introductionmentioning

confidence: 99%

Improvement of Phosphate Adsorption Kinetics onto Ferric Hydroxide by Size Reduction

Martí

Jubany

Ribas

et al. 2021

Water

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Ball milling and ultra-sonication size reduction procedures were applied to granular ferric hydroxide (GFH) to obtain two micro-sized adsorbents. These two adsorbents and GFH were investigated to improve the removal of phosphates from water. The size reduction procedures, using the milling method, allowed a reduction of size from 0.5–2 mm to 0.1–2 µm and total disaggregation of the GFH structure. Using an ultra-sonication method yielded a final size of 1.9–50.3 µm with partial disaggregation. The Langmuir model correlated well with the isotherms obtained in batch equilibrium tests for the three adsorbents. The maximum adsorption capacity (qmax) for the milled adsorbent was lower than GFH, but using ultra-sonication was not different from GFH. The equilibrium adsorption of two wastewater samples with phosphate and other anions onto the GFH corresponded well with the expected removal, showing that potential interferences in the isotherms were not important. Batch kinetics tests indicated that the pseudo second-order model fitted the data. Long-term adsorption capacity in kinetics (qe) showed the same trend described for qmax. The application of milling and ultra-sonication methods showed 3.5- and 5.6-fold increases of the kinetic constant (k2) versus the GFH value, respectively. These results showed that ultra-sonication is a very good procedure to increase the adsorption rate of phosphate, maintaining qe and increasing k2.

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“…After obtaining the optimal conditions for the adsorption of rare-earth ions, the adsorption capacity of REEs on EDTA–CS@ZIF-8 was discussed. In order to apply adsorbents to various fields, adsorption kinetics and adsorption isotherm models were established to interpret the data and determine the extent of the adsorption process [ 32 , 33 ]. The purpose of this research is to synthesize a new type of adsorption material EDTA–CS@ZIF-8, and to investigate its adsorption efficiency for rare-earth elements (La(III), Eu(III), and Yb(III)) in water, aiming to develop a method for the efficient adsorption and recovery of heavy metals and to apply it in practice.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of REEs from Aqueous Solution by EDTA-Chitosan Modified with Zeolite Imidazole Framework (ZIF-8)

Feng

Bat-Amgalan

et al. 2021

IJMS

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Chitosan (CS) modified with ethylenediamine tetraacetic acid (EDTA) was further modified with the zeolite imidazole framework (ZIF-8) by in situ growth method and was employed as adsorbent for the removal of rare-earth elements (REEs). The material (EDTA–CS@ZIF-8) and ZIF-8 and CS were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscope (SEM), and nitrogen adsorption/desorption experiments (N2- Brunauer–Emmet–Teller (BET)). The effects of adsorbent dosage, temperature, the pH of the aqueous solution, contact time on the adsorption of REEs (La(III), Eu(III), and Yb(III)) by EDTA–CS@ZIF-8 were studied. Typical adsorption isotherms (Langmuir, Freundlich, and Dubinin–Radushkevich (D-R)) were determined for the adsorption process, and the maximal adsorption capacity was estimated as 256.4 mg g−1 for La(III), 270.3 mg g−1 for Eu(III), and 294.1 mg g−1 for Yb(III). The adsorption kinetics results were consistent with the pseudo-second-order equation, indicating that the adsorption process was mainly chemical adsorption. The influence of competing ions on REE adsorption was also investigated. After multiple cycles of adsorption/desorption behavior, EDTA–CS@ZIF-8 still maintained high adsorption capacity for REEs. As a result, EDTA–CS@ZIF-8 possessed good adsorption properties such as stability and reusability, which have potential application in wastewater treatment.

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Kinetics, Isotherms, and Thermodynamic Modeling of the Adsorption of Phosphates from Model Wastewater Using Recycled Brick Waste

Cited by 244 publications

References 36 publications

Multifunctional application of PVA-aided Zn–Fe–Mn coupled oxide nanocomposite

Multifunctional application of PVA-aided Zn–Fe–Mn coupled oxide nanocomposite

Improvement of Phosphate Adsorption Kinetics onto Ferric Hydroxide by Size Reduction

Adsorption of REEs from Aqueous Solution by EDTA-Chitosan Modified with Zeolite Imidazole Framework (ZIF-8)

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