Experimental and mathematical modeling of Cr(VI) removal using nano-magnetic Fe3O4-coated perlite from the liquid phase

Ahmed, Ismail; Hamed, Mostafa M.; Metwally, S.S.

doi:10.1016/j.cjche.2019.12.027

Cited by 29 publications

(3 citation statements)

References 33 publications

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“…Intraparticular diffusion model (IPD) which also known as Weber–Morris kinetic model was applied to investigate the impact of resistance to intra-particle diffusion, and provide a more comprehensive description for the sorption mechanism (Hussein and Taha 2013 ; Ahmed et al 2020 ). The linear form of the Morris − Weber model is displayed in Table S1 , while the model parameters, namely C and ki, were evaluated and shown in Table S2.…”

Section: Resultsmentioning

confidence: 99%

Active carbon-based waste packaging materials for uranium sorption from aqueous solution

El-Zoghby

Fahmy

Taha

et al. 2023

Environ Sci Pollut Res

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Waste (packaging plastic and industrial water) accumulation is one of the great global challenges over the world. Combining waste recycling science and water treatment knowledge are fascinating as applied sciences add value to the safe disposal of waste plastic packaging materials and wastewater. Active carbons (ACs) are prepared from polyethylene terephthalate (PET) at two pyrolysis temperatures (i.e. 450 and 500 °C) and compressed in well-defined designed molds to form cylinder shapes as applied in industry. Particle size (817 and 1074 nm), zeta potential (− 7.17 and − 25.6 mV), surface area (544 and 632 m2/g), and topography of prepared ACs were investigated and discussed. Zeta potential exhibited nice dispersion in accordance to charge value and surficial SEM images prove space hole filling with adsorbed materials after treatment. The prepared activated carbon sorbents have been applied for the removal of radioactive elements from wastewater. The displayed data declare that both sorbents have the same sorption performance, whereas the uranium sorption process using both sorbents is obeyed to pseudo-second-order kinetic model and Langmuir isotherm model. Nevertheless, it is worth noting that the prepared AC at a pyrolysis temperature of 500 °C exhibits higher sorption capacity (38.9 mg g−1) than that prepared at lower temperature, i.e., 450 °C (36.2 mg g−1) which indicates that the increase in pyrolysis temperature improves the sorption characteristics of the yield-activated carbon.

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Section: Resultsmentioning

confidence: 99%

Active carbon-based waste packaging materials for uranium sorption from aqueous solution

El-Zoghby

Fahmy

Taha

et al. 2023

Environ Sci Pollut Res

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“…In the view of current scenario of constant industrial expansion and, consequently, the growth in the pollution of water bodies by the discharge of contaminated effluents, different techniques for the capture of contaminants were increasingly explored including adsorption (Hamed et al 2019 ; Ahmed et al 2020 ), ion exchange (Abdel Rahman et al 2018 ), impregnation (Rizk et al 2018 ; Metwally and Attallah 2019 ), biosorption (Metwally et al 2017 ), membrane (Hegazy et al 2006 ), or mixed techniques.…”

Section: Introductionmentioning

confidence: 99%

Post-irradiation physicochemical features of polymer composite for the removal of Co(II) and Nd(III) from aqueous solutions

El-Masry

Mohamed

Metwally

2022

Environ Sci Pollut Res

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The scientific impact of this work is the protection of the environment from hazardous pollutants. Gamma irradiation was employed for the preparation of a new composite polymer by irradiating a mixture containing polyvinyl pyrrolidone (PVP), hydroxyethyl methacrylate (HEMA), and tannic acid (TA) to produce PVP–HEMA–TA. The sorption efficiency and capacity of PVP–HEMA–TA were evaluated by studying some factors affecting the sorption of Nd(III) and Co(II) from aqueous solutions. The results demonstrated that the maximum uptake was 92.4 and 75.3% for Nd(III) and Co(II), respectively. From the kinetic studies, the pseudo-second-order equation could better fit the data than the pseudo-first-order for the sorption of both ions. The sorption isotherm investigations illustrated that the Langmuir equation fits the gained data better than Freundlich equation. The Langmuir capacity was 64.5 and 60.8 mg/g for neodymium and cobalt ions, respectively. The applicability of Langmuir equation is strong evidence that the process is limited by a chemisorption mechanism. Findings of the work highlight the potential utilization of PVP–HEMA–TA as an effective and recyclable material for the elimination of Nd(III) and Co(II) from the aqueous phase.

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“…It has highly developed surface area [ 25 ]. Due to its characteristics it can be used in various branch of applications, for example: building materials, efficient filter aid and filler in several processes and materials [ 26 , 27 ]. Additionally, perlites are used in heavy metals removal (for example cadmium(II), molybdenum(VI), cobalt(II) copper(II) and chromium(III)) [ 28 ].…”

Section: Introductionmentioning

confidence: 99%

Sorption of Heavy Metal Ions of Chromium, Manganese, Selenium, Nickel, Cobalt, Iron from Aqueous Acidic Solutions in Batch and Dynamic Conditions on Natural and Synthetic Aluminosilicate Sorbents

et al. 2020

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Zeolites are materials with known sorption properties. The sorption is thought to progress mainly by ion exchange with Na+, K+, Mg2+, Ca2+ or H+ from the zeolite exchange sites. The aim of the study was to compare the sorption properties of natural and synthetic zeolites on the example of the removal of selected metals from aqueous acidic solutions. Uptake experiments for selected ions of chromium, manganese, selenium, nickel, cobalt, and iron were performed using the batch and kinetic column methods. The sorption of the individual metal ions in mg per 1g of sorbent was determined for each sorbent. The relative affinity sequence of the examined cations toward the various sorbent was presented. The Langmuir model was used to model the adsorption equilibrium. Vermiculite under 1 mm of diameter (SF), Na-X, and Na-A were proved to be the most suitable for the individual uptake of studied metal ions. It was observed that the behavior of selenium ions differed from the remaining ones which was interpreted that selenium undergoes adsorption in the anionic form. The fixed-bed column studies were performed using Na-A, ensuring the sorption of selenium in the presence of iron(III) ions. The experiments were conducted using Na-X zeolite pre-loaded by Fe(III) as well as unmodified sorbent eluted by an equimolar mixture containing 100 ppm of Fe and Se. Obtained results prove that selenium sorption improves if other metal ions such as iron appear in the acidic solution. That efficient selenium sorption conditions can be applied to remove selenium which was recognized as toxic at higher levels.

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Experimental and mathematical modeling of Cr(VI) removal using nano-magnetic Fe3O4-coated perlite from the liquid phase

Cited by 29 publications

References 33 publications

Active carbon-based waste packaging materials for uranium sorption from aqueous solution

Active carbon-based waste packaging materials for uranium sorption from aqueous solution

Post-irradiation physicochemical features of polymer composite for the removal of Co(II) and Nd(III) from aqueous solutions

Sorption of Heavy Metal Ions of Chromium, Manganese, Selenium, Nickel, Cobalt, Iron from Aqueous Acidic Solutions in Batch and Dynamic Conditions on Natural and Synthetic Aluminosilicate Sorbents

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