Novel application of nanoscale zero valent iron and bimetallic nano-Fe/Cu particles for the treatment of cesium contaminated water

Shubair, Tamer; Eljamal, Osama; Khalil, Ahmed M.E.; Tahara, Atsushi; Matsunaga, Nobuhiro

doi:10.1016/j.jece.2018.06.015

Cited by 49 publications

(24 citation statements)

References 66 publications

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“…For experiments 4 and 5, which were conducted under ambient conditions, the effect of CuCl 2 on phosphorus removal was investigated. In the NZVI study field, several heavy metals were reported to have enhanced the reactivity because they provided more active site on the surface of NZVI or they served as reductants 28), 30) . The NZVI/CuCl 2 (10.0 g: 1.0 g) bimetallic nano particles 28) were used as adsorbents for experiment 4.…”

Section: (4) Details Of the Continuous Systemmentioning

confidence: 99%

Development of Continuous System Based on Nanoscale Zero Valent Iron Particles for Phosphorus Removal

et al. 2019

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Nanoscale Zero Valent Iron (NZVI) is one of the materials that have gained attention in the field of water treatment and environmental remediation in recent years. The main purpose of this study is to develop and evaluate a phosphorus removal system using NZVI particles. The NZVI used for the experiments was synthesized under optimum conditions using the chemical reduction method. This continuous system consisted of Continuous Stirred Flask Reactor (CSFR), settler, polishing unit, and sand column. The continuous experiment showed that 73.84% phosphorus was removed mainly at CSFR. Further, 80.62% total iron was removed and recycled at the settler. Based on the continuous operation results, there was a strong relationship between iron concentration and ORP value (R 2 = 0.9969). This result indicated that ORP would be an important monitoring parameter while operating the continuous system. The aerobic condition contributed the highest phosphorus overall removal efficiency (91.37%) due to the enhancement of iron corrosion. Copper bimetal particles also achieved the highest removal efficiency (94.96%) after increasing the active site and decreasing the solution pH. Finally, comparing the aerobic and bimetallic cases, we concluded that the bimetallic case is the best condition for removing phosphorus because it could treat large solution volume than the aerobic one could.

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Section: (4) Details Of the Continuous Systemmentioning

confidence: 99%

Development of Continuous System Based on Nanoscale Zero Valent Iron Particles for Phosphorus Removal

et al. 2019

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“…Compared to other physicochemical and biological technologies, in this method, the eﬃciency is higher, there is a selectivity toward nontoxic products, relatively mild conditions are required, and the operation is easier . Various materials have been used for catalytic dye removal to develop eﬀective and selective nanocatalysts …”

Section: Introductionmentioning

confidence: 99%

“…Supporting NZVI on some clays such as kaolin, hematite and bentonite results efficient dispersion of NZVI which prevents its aggregation causing greater reduction performance . On the other hand, the oxidation rate and aggregation tendency of NZVI could be reduced depositing second catalytic metals, such as Pd, Pt, Cu, Ni, etc., onto its surface . Also, the activation energy of the reduction reaction could be decreased using the catalytic property of the second metal .…”

Section: Introductionmentioning

confidence: 99%

“…Also, the activation energy of the reduction reaction could be decreased using the catalytic property of the second metal . It also improves the reduction rate . In particular, bimetallic catalysts are very useful in dehalogenation of chlorinated organic compounds .…”

Section: Introductionmentioning

confidence: 99%

“…In particular, bimetallic catalysts are very useful in dehalogenation of chlorinated organic compounds . Deposing catalyst metals on the surface of NZVI increases the reduction rate which is in the result of the catalytic role of hydrogen and electro‐reduction of these metals . The benefits of bimetallic particles compared to NZVI are higher reaction rate and fewer corrosion products which are deposed on the surface of particles .…”

Section: Introductionmentioning

confidence: 99%

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A Novel and Efficient Dyes Degradation Using Bentonite Supported Zero‐Valent Iron‐Based Nanocomposites

2020

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In this research, different nanocomposites were synthesized based on bentonite supported with zero‐valent iron in mono‐, bi‐, and tri‐metallic systems and used to degrade two model anionic dyes, methyl orange and Congo red, from wastewaters. The synergic effect between bentonite and the nanoscale zero‐valent iron‐based tri‐metallic system was investigated along with degradation efficiencies. It was found out that bentonite supported with Fe−Cu‐Ag tri‐metallic nanoscale system yields higher degradation efficiency and maximum synergic effect for both of dyes occurs, especially at acidic medium. Therefore, the characterization of this nanocomposites was conducted by BET, FTIR, SEM‐EDX, TEM and XRD which demonstrated successful loading of nanoscale Fe−Cu‐Ag tri‐metallic onto bentonite clay. All involved variables affecting the dye degradation efficiencies were modeled and optimized using central composite design under batch adsorption procedure. The Nelder‐Mead non‐linear optimization algorithm was used and the outcomes showed the optimum conditions regarding the removal of 300 ppm of both dyes, for the nanocomposites dose of 4.0 mg.mL−1, pH of 3 and contact time of 18 min were attained. Furthermore, dyes adsorption kinetics were investigated. In addition, the proposed nanocomposite was successfully applied to reduce the concentration of methyl orange and Congo red as hazardous dyes in the water and wastewater samples.

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Synthesis of nanoscale zero‐valent iron modified graphene oxide nanosheets and its application for removing tetracycline antibiotic: Response surface methodology

Hemmat

Khodabakhshi

Moghaddam

2020

Applied Organom Chemis

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Nowadays, pharmaceutical antibiotics are known as a serious class of pollutants. Therefore, it is important to develop effective methods for removing these pollutants from aqueous media. Different methods were applied for this purpose, and among these methods, chemical reduction by a cheap and eco-friendly nanocatalyst is the most efficient and simplest method. In this research, based on graphene oxide supported by zero-valent iron in mono-, bi-, and tri-metallic systems, various nanocomposites were synthesized and used to degrade tetracycline as a model antibiotic from aqueous media. An investigation was carried out on the synergic effect among graphene oxide and the nano zero-valent iron-based tri-metallic system as well as removal efficiencies. It was found that higher degradation efficiency is yielded by graphene oxide supported by Fe/Cu/Ag tri-metallic system. The maximum synergic effect occurs at an acidic medium. The Brunauer-Emmett-Teller, Fourier transform spectroscopy, scanning electron microscopy-energy dispersive X-ray analysis, transmission electron microscopy, and X-ray diffraction analysis were used to characterize the synthesized nanocomposites, which has successfully proved the loading of nanoscale Fe/Cu/Ag tri-metallic on a graphene oxide support. The central composite design was used to model and optimize all involved variables affecting antibiotic removal efficiency. The consequences illustrated the optimum condition regarding the removal of 50 ppm of tetracycline, for the nanocomposites dose of 3.0 mg ml −1 , the contact time of 30 min, and pH of 2, was achieved using the simplex non-linear optimization method. Moreover, antibiotic adsorption kinetic models were also investigated. Finally, the tetracycline removal from aqueous media at different concentrations, 25, 50, and 75 ppm, was successful by applying the proposed nanocomposite, and the results showed tetracycline removal efficiencies of above 70%.

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Novel application of nanoscale zero valent iron and bimetallic nano-Fe/Cu particles for the treatment of cesium contaminated water

Cited by 49 publications

References 66 publications

Development of Continuous System Based on Nanoscale Zero Valent Iron Particles for Phosphorus Removal

Development of Continuous System Based on Nanoscale Zero Valent Iron Particles for Phosphorus Removal

A Novel and Efficient Dyes Degradation Using Bentonite Supported Zero‐Valent Iron‐Based Nanocomposites

Synthesis of nanoscale zero‐valent iron modified graphene oxide nanosheets and its application for removing tetracycline antibiotic: Response surface methodology

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