Efficient removal of congo red dye using Fe<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" id="d1e1272" altimg="si3.svg"><mml:msub><mml:mrow /><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub></mml:math>O<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" id="d1e1280" altimg="si4.svg"><mml:msub><mml:mrow /><mml:mrow><mml:mn>4</mml:mn></mml:mrow></mml:msub></mml:math>/NiO nanocomposite: Synthesis and characterization

Koohi, Peyman; Rahbar-Kelishami, Ahmad; Shayesteh, Hadi

doi:10.1016/j.eti.2021.101559

Cited by 70 publications

(8 citation statements)

References 52 publications

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“…In another study, Karthikeyan et al 30 studied the adsorption of phosphate and nitrate ions from water using magnetic kaolin (MK) chitosan beads and reported that, the removal of phosphate and nitrate increased with the increasing amounts of MK-chitosan beads due to the increase in reactive vacant sites of the adsorbent surface. Moreover, they also reported that, there was no significant change in the removal rate at the adsorbent amounts greater than 100 mg. Koohi et al 31 also reported similar results. They found that the removal efficiency of Congo red increased with the increasing amounts of Fe 3 O 4 /NiO due to the increase in the active surface area, and after the adsorbent amount of 15 g/L, no significant change was observed in the removal rate.…”

Section: Effect Of Adsorbent Amountmentioning

confidence: 54%

“…After the original pH, the removal rate decreased with the increase in solution pH, which could be attributed to the de-protonation of the adsorbent surface. Similarly, Koohi et al 31 reported that the removal of Congo red decreased as the pH was increased after the optimum pH. They also reported that, the adsorption capacity gradually decreased, due to the repulsion between the Congo red ions and the adsorbent molecules.…”

Section: Effect Of Temperaturementioning

confidence: 87%

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Removal of Diazo Dye Direct Red 28 and Tetra Azo Dye Direct Black 22 Using Synthesized Magnetic Kaolin Supported Zinc Ferrite

Fındık

2022

ACSi

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The presence of dye molecules in water resources has harmful effects on environment. Therefore, it is important to remove dyes from wastewater using eco-friendly materials. In this study, adsorptive removal of diazo dye Direct Red 28 (DR-28) and tetra azo dye Direct Black 22 (DB-22) was investigated by using a new composite, kaolin supported zinc ferrite (KZF) as adsorbent. Characteristics of the composite, KZF were determined using various techniques such as FTIR, SEM, XRD, VSM, and EDS/Mapping. The adsorption of DR-28 and DB-22 on KZF was studied as a function of contact time, initial dye concentration, adsorbent amount, temperature, initial pH of the solution as well as the heat treatment of the composite. The removal of DR-28 was found to be 92.4% for the KZF concentration of 1g/200mL, initial dye concentration of 20 mg/L, contact time of 120 min at original pH and 21 °C. On the other hand the removal of DB-22 was found to be 91.7% under the same conditions at 40 °C. The results showed that Langmuir isotherm is suitable for the adsorption of DR-28 and DB-22 on KZF under given conditions. It was found that adsorption of DR-28 on KZF was exothermic while that of DB-22 was endothermic. The enthalpy changes (ΔH0) for the adsorption of DR-28 and DB-22 dyes on KZF were found to be –24.59 kJ/mol and 61.95 kJ/mol respectively. ΔS0 for the adsorption of DR-28 dye was found to be negative while ΔS0 for the adsorption of DB-22 was positive. The kinetic data fitted well to the pseudo second order model for the adsorption of DR-28 and DB-22 on KZF composite. These results showed that the prepared adsorbent KZF could be used as an adsorbent for the efficient removal of anionic dyes.

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Section: Effect Of Adsorbent Amountmentioning

confidence: 54%

Section: Effect Of Temperaturementioning

confidence: 87%

Removal of Diazo Dye Direct Red 28 and Tetra Azo Dye Direct Black 22 Using Synthesized Magnetic Kaolin Supported Zinc Ferrite

Fındık

2022

ACSi

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“…Figure 5 a shows the influence of NiO/PDA dose on MV2B adsorption. The adsorption efficiency increased as the dose was increased [ 18 ]. This increase comes from the increasing availability of active sites developed with the increased dose of PDA/NiO.…”

Section: Resultsmentioning

confidence: 99%

“…The NiO nanoparticles prepared by a green hydrothermal method and NiO nanobelts synthesized hydrothermally were utilized for the removal of dyes [ 15 , 16 ]_ENREF_15_ENREF_15. The modified NiO with sepiolite and Fe 3 O 4 to produce NiO/sepiolite and Fe 3 O 4 /NiO nanocomposites of high adsorption capacities were also applied for the removal of Congo Red from wastewater [ 17 , 18 ].…”

Section: Introductionmentioning

confidence: 99%

Eco-Friendly NiO/Polydopamine Nanocomposite for Efficient Removal of Dyes from Wastewater

et al. 2022

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The rapid development of industries discharges huge amounts of wastewater that contain surface water. For this reason, we used NiO/polydopamine (NiO/PDA) nanocomposite as an efficient material for the removal of Methyl violet 2B from water. It was synthesized and then characterized by Fourier Transform Infrared (FT-IR) spectroscopy, X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Energy Dispersive X-ray (EDX) analysis, Transmission Electron Microscopy (TEM), and Brunauer–Emmett–Teller (BET). The EDX analysis confirmed the presence of O, Ni, N, and C. The composite has an average particle size of 18 nm. Its surface area is 110.591 m2/g. It was found that the efficiency of dye removal by adsorption on NiO/PDA exceeded that of bare NiO. The adsorption capacity of NiO and NiO/PDA are 126 and 284 mg/g, respectively. The effects of adsorbent dose, dye concentration, and pH on the removal efficiency were examined. The efficiency increased with increasing the adsorbent dose and pH, but dropped from 85 to 73% within 30 min as the initial dye concentration was increased from 0.984 to 4.92 mg/L. Such a drop in the removal efficiency is due to the blocking of the surface-active sites of NiO/PDA, with the high population of dye molecules derived from the continuous increase in dye concentration. The adsorption results of the dye fitted well with the pseudo-second-order kinetics and Langmuir isotherm. The reusability data showed that NiO/PDA was stable across three adsorption–regeneration cycles, thus it can be considered a good recyclable and efficient adsorbent. Because of these results, it can be considered that this method can be applied for the treatment of wastewater.

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“…To date, many physical, biological and chemical methods have been developed to treat organic dyes from wastewater. 3 However, these methods have some disadvantages, such as activated carbon used in physical methods often causing secondary pollution, 4 biological methods can only be applied to treat wastewater containing few dyes because of the toxicity of most industrial organic dyes 5 and chemical methods can only be used once and cannot be recycled by catalytic materials. 6 Compared with the various wastewater treatment methods mentioned above, advanced oxidation processes, such as photocatalytic oxidation and Fenton (-like) oxidation, have been considered as a high-efficiency, non-toxic and low-cost way to overcome these disadvantages.…”

Section: Introductionmentioning

confidence: 99%

The Piezo–Fenton synergistic effect of ferroelectric single-crystal BaTiO₃ nanoparticles for high-efficiency catalytic pollutant degradation in aqueous solution

et al. 2022

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Efficient removal of congo red dye using Fe3O4/NiO nanocomposite: Synthesis and characterization

Cited by 70 publications

References 52 publications

Removal of Diazo Dye Direct Red 28 and Tetra Azo Dye Direct Black 22 Using Synthesized Magnetic Kaolin Supported Zinc Ferrite

Removal of Diazo Dye Direct Red 28 and Tetra Azo Dye Direct Black 22 Using Synthesized Magnetic Kaolin Supported Zinc Ferrite

Eco-Friendly NiO/Polydopamine Nanocomposite for Efficient Removal of Dyes from Wastewater

The Piezo–Fenton synergistic effect of ferroelectric single-crystal BaTiO₃ nanoparticles for high-efficiency catalytic pollutant degradation in aqueous solution

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Efficient removal of congo red dye using Fe3O4/NiO nanocomposite: Synthesis and characterization

Cited by 70 publications

References 52 publications

Removal of Diazo Dye Direct Red 28 and Tetra Azo Dye Direct Black 22 Using Synthesized Magnetic Kaolin Supported Zinc Ferrite

Removal of Diazo Dye Direct Red 28 and Tetra Azo Dye Direct Black 22 Using Synthesized Magnetic Kaolin Supported Zinc Ferrite

Eco-Friendly NiO/Polydopamine Nanocomposite for Efficient Removal of Dyes from Wastewater

The Piezo–Fenton synergistic effect of ferroelectric single-crystal BaTiO3 nanoparticles for high-efficiency catalytic pollutant degradation in aqueous solution

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Product

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The Piezo–Fenton synergistic effect of ferroelectric single-crystal BaTiO₃ nanoparticles for high-efficiency catalytic pollutant degradation in aqueous solution