Wastewater degradation by iron/copper nanoparticles and the microorganism growth rate

Amen, Tareq W.M.; Eljamal, Osama; Khalil, Ahmed M.E.; Matsunaga, Nobuhiro

doi:10.1016/j.jes.2018.01.028

Cited by 48 publications

(25 citation statements)

References 35 publications

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“…1 (b) and Fig. 1(c) show the XRD pattern diffraction peaks of nZVI and nFe/Cu at 2θ = 44.60°, 64.68° and 82.35°, indicating the presence of pure iron metal (Amen et al 2018). Fig.…”

Section: Resultsmentioning

confidence: 97%

Optimization of Strontium Removal Process From Contaminated Water Using Zeolite Nanocomposites

Karmaker

Eljamal

Saha

2021

Preprint

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The effective removal of strontium from polluted water is an emerging issue worldwide, especially in Japan, after the destruction of Fukushima’s Daiichi Nuclear Power Plant. In the strontium removal process, statistical optimization of associated factors is needed to reduce the quantity of chemicals and the number of experimental trials. In this study, response surface methodology based on the central composite design was employed for assessing the influence of different factors and their interaction effects on the efficiency of strontium removal. We have considered nanoscale zero-valent iron-zeolite (nZVI-Z) and nano-Fe/Cu zeolite (nFe/Cu-Z) as adsorbents for the effective removal of strontium. The present study showed that the most statistically significant potential contributor was initial concentration, followed by contact time in the removal process. The study indicated that the interaction effect between contact time and initial concentration was statistically important, suggesting the need for a multi-mechanism technique in the removal phase of strontium. Tόth, Langmuir, Dubinin-Astakhov (D-A), Freundlich, and Hill isotherm models were also fitted with the experimental strontium adsorption data, in which the Tόth model fitted best compared to the other models based on the RMSD.

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“…1 (b) and Fig. 1(c) show the XRD pattern diffraction peaks of nZVI and nFe/Cu at 2θ = 44.60°, 64.68° and 82.35°, indicating the presence of pure iron metal (Amen et al 2018). Fig.…”

Section: Resultsmentioning

confidence: 97%

Optimization of Strontium Removal Process From Contaminated Water Using Zeolite Nanocomposites

Karmaker

Eljamal

Saha

2021

Preprint

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“…Comparing experiments 1, 4, and 5, the highest overall removal efficiency was obtained from experiment 4 (CuCl 2 bimetallic). The bimetallic particles could provide more active site on the surface of nanoparticles and phosphorus could be adsorbed easily 28) . And also some researchers have reported that acidic pH enhanced the phosphorus adsorption 11), 21) (Fig.…”

Section: Discussion (1) the Phosphorus Removal Mechanisms And Overallmentioning

confidence: 99%

“…for aging to complete the reaction 23) . In the case of CuCl 2 bimetallic synthesis, 1.0 g CuCl 2 was added to precursor 2 before mixing with precursor 1 28) . The synthesized particles were filtered by vacuum filter, washed with DIW three times, and immediately used in the continuous experiments.…”

Section: (2) Synthesis Of Nzvimentioning

confidence: 99%

“…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. In experiment 5, 1.0 g CuCl 2 was added to CSFR before beginning the operation 23) .…”

Section: (4) Details Of the Continuous Systemmentioning

confidence: 99%

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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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“…19,20 It is, in fact, one of the most commonly used adsorbents to treat wastewater of soluble contaminants. [20][21][22] However, despite the high adsorption capability of nZVI, the effect of its aggregation on the reactivity of the material cannot be neglected. 19,20,[23][24][25] To overcome the aggregation of nZVI, much attention has been focused on the method of its modification, for example modification via magnesium hydroxide, grafted surfactants and by loading other organic substances over the nZVI surface.…”

Section: Introductionmentioning

confidence: 99%

Enhancing arsenic removal from acidic wastewater using zeolite‐supported sulfide nanoscale zero‐valent iron: the role of sulfur and copper

Zhou

Han

Min

et al. 2021

J of Chemical Tech & Biotech

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Wastewater degradation by iron/copper nanoparticles and the microorganism growth rate

Cited by 48 publications

References 35 publications

Optimization of Strontium Removal Process From Contaminated Water Using Zeolite Nanocomposites

Optimization of Strontium Removal Process From Contaminated Water Using Zeolite Nanocomposites

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

Enhancing arsenic removal from acidic wastewater using zeolite‐supported sulfide nanoscale zero‐valent iron: the role of sulfur and copper

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