Green synthesis of nano zero-valent iron/Cu by green tea to remove hexavalent chromium from groundwater

Zhu, Fang; Ma, Shufang; Liu, Tao; Deng, Xiaoqiang

doi:10.1016/j.jclepro.2017.10.302

Cited by 211 publications

(72 citation statements)

References 33 publications

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“…The broadband at 3400-3000 cm −1 was attributed to O-H-stretching vibration and indicates the presence of polyphenols which can improve material stability (Soliemanzadeh and Fekri 2017;Al-Qahtani 2017). The band at 1615 cm −1 was attributed to the stretching vibration of C=O (Zhu et al 2018); the peak at 1539 cm −1 indicates the presence of Ficus amide(Al-Qahtani, 2017); the peak 1362 cm −1 indicates the presence of polyphenols aromatic ring C=C stretching vibration (Fathima et al 2018); and the peak 1102 cm −1 indicates (Zhu et al 2018). According to Fig.…”

Section: Characterization and Analysis Of Fb-nzvi/cumentioning

confidence: 96%

“…The FB-nZVI/Cu nanoparticles were separated using centrifugation for 10 min and the resulting FB-nZVI/Cu was washed with distilled water and with anhydrous alcohol. The FB-nZVI/Cu was then placed at 65 °C in a vacuum dryer oven, and then was stored at 4 °C until used (Zhu et al 2018).…”

Section: Synthesis Of Fb-nzvi/cumentioning

confidence: 99%

“…Nowadays, most of the nanoparticles are prepared by sodium borohydride, but they are classified from the monocrystals that cause significant contamination if used extensively. It is, therefore, necessary to find alternative, low-cost, environmentally friendly methods (Zhu et al 2018;Danish et al 2017). Traditional methods adopted for the synthesis of FeNPs or CuNPs by sonochemical synthesis, vacuum sputtering, physical method (attrition), and thermal decomposition.…”

Section: Introductionmentioning

confidence: 99%

“…Ficus Benjamina leaves' extract provides a greener, economic, and fast method for the synthesis of nanoparticles with an appropriate size (Puente et al 2019;Al-Qahtani 2017). So far, copper and Fe nanoparticles prepared by green synthesis have proven to be efficient to remove many contaminants (Zhu et al 2018;Danish et al 2017). Although studies have demonstrated the feasibility of the green synthesis of nZVI, the application of green synthetic iron-copper bimetallic nanoparticles has rarely been reported.…”

Section: Introductionmentioning

confidence: 99%

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Carbamazepine Removal from Aqueous Solution by Green Synthesis Zero-Valent Iron/Cu Nanoparticles with Ficus Benjamina Leaves’ Extract

Abdelaziz¹,

Farag

Abdel‐Gawad

2019

Int J Environ Res

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Green synthesis of nanoparticles is an eco-friendly treatment technique. Bimetallic nano zero-valent Fe/Cu was successfully prepared by green synthesis by Ficus Benjamina leaves (FB-ZVI/Cu). The nanoscale FB-ZVI/Cu was characterized by scanning electron microscope, Fourier transform infrared spectroscopy, and dispersive X-ray spectroscopy. The characterization revealed that synthesis and presence of iron-copper nanoparticles and biomolecules which could help in capping the bimetallic nanoparticles. Subsequently, nanoscale zero-valent Fe/Cu particles were used to remove carbamazepine from the aqueous medium under varying experimental conditions, including pH, initial carbamazepine concentration, Fe/CuNPs dose, stirring rate, and contact time. The removal efficiency of carbamazepine reached 95% under the condition of dose 0.4 g L −1 , time 20 min, and pH 5. The results were analyzed according to the Freundlich and Langmuir adsorption isotherms. The adsorption data are more appropriate by the Langmuir adsorption model (R 2 = 0.998) with q max = 26.15 mg g −1. Overall, FB-nZVFe/Cu is a promising green substance to remove carbamazepine from aqueous solutions. The effect of different operating parameters was investigated using linear regression analysis, they were found to account for more than 97% of the variables affecting the removal process. Article Highlights • Bimetallic nZVFe/Cu was synthesized using the Ficus Benjamina leaves' extracts. • Nanoparticles were characterized by SEM, EDAX, and FTIR. • The green-synthesized FB-nZVFe/Cu nanoparticles can remove carbamazepine from aqueous solutions. • Removing mechanism based on adsorption and reduction is proposed. • A high removal percentage of carbamazepine was 95%. • Lower FB-nZVI/Cu PZC values.

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Section: Characterization and Analysis Of Fb-nzvi/cumentioning

confidence: 96%

Section: Synthesis Of Fb-nzvi/cumentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Carbamazepine Removal from Aqueous Solution by Green Synthesis Zero-Valent Iron/Cu Nanoparticles with Ficus Benjamina Leaves’ Extract

Abdelaziz¹,

Farag

Abdel‐Gawad

2019

Int J Environ Res

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“…Previous studies have shown that the effect of HA on Cr(VI) removal was inconsistent, including both promotion and inhibition. Zhu et al [36] found that the presence of HA in aqueous media can inhibit the Cr(VI) removal efficiency. This result might have been due to HA competing with Cr(VI) adsorbed on the active surface sites of nZVI/ Cu, thus reducing Cr(VI) removal efficiency.…”

Section: Effect Of Coexisting Ions and Hamentioning

confidence: 99%

Detoxification of Cr(VI) using biochar-supported Cu/Fe bimetallic nanoparticles

Shao¹,

ShaoYu²,

Xu³

et al. 2019

Desalination and Water Treatment

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Nanoscale zero-valent iron (nZVI) has been proven to be more effective for the treatment of hexavalent chromium(Cr(VI)) when modified with the transition metal Cu. In this study, biochar-supported Cu/Fe bimetallic nanoparticles (Cu-nZVI/BC) were prepared and used for Cr(VI) removal from aqueous solution. The effects of the pH value, the initial concentration of Cr(VI), coexisting ions and humic acids (HA) were investigated. The compositional structures of Cu-nZVI/BC were analyzed by transmission electron microscopy, scanning electron microscopy, X-ray diffraction and X-ray photoelectron spectroscopy. The maximum removal efficiency of Cr(VI) was 50.57% (126.41 ± 3.75 mg g-1) for Cu-nZVI/BC at pH 2. The adsorption kinetic data were in agreement with the pseudo-second-order model, which confirmed that the adsorption step was a chemical adsorption and reduction process. The presence of Ca 2+ and NO 3 had an inhibitory effect on Cr(VI) removal, while dHA increased the removal efficiency at high concentrations. This study proves that Cu-nZVI/BC removal of solution Cr(VI) is feasible and shows significant potential in practical applications.

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Synthesis, Mechanism, and Performance Assessment of Zero‐Valent Iron for Metal‐Contaminated Water Remediation: A Review

Ullah

Faiz

Leng

2020

CLEAN Soil Air Water

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Recently, increased industrial and agriculture activities have resulted in toxic metal ions, which has increased public concern about the quality of surface and groundwater. Various types of physical, biological, and chemical approaches have been developed to remove surface and groundwater metal ions contaminants. Among these practices, zero‐valent iron (ZVI) is the most studied reactive material for environmental clean‐up over the last two decade and so. Although ZVI can remove the contaminants even more efficiently than any other reactive materials. However, low reactivity due to its intrinsic passive layer, narrow working pH, and the loss of hydraulic conductivity due to the precipitation of metal hydroxides and metal carbonates limits its wide‐scale application. The aim of this work is to document properties, synthesis, and reaction mechanism of ZVI for the treatment of metal ions from the surface and groundwater in recent 10 years (2008–2018). So far, different modified techniques such as conjugation with support, bimetal alloying, weak magnetic field, and ZVI/oxidant coupling system have been developed to facilitate the use of ZVI in various environmental remediation scenarios. However, some challenges still remain to be addressed. Therefore, development and research in this field are needed to overcome or mitigate these limitations.

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Green synthesis of nano zero-valent iron/Cu by green tea to remove hexavalent chromium from groundwater

Cited by 211 publications

References 33 publications

Carbamazepine Removal from Aqueous Solution by Green Synthesis Zero-Valent Iron/Cu Nanoparticles with Ficus Benjamina Leaves’ Extract

Carbamazepine Removal from Aqueous Solution by Green Synthesis Zero-Valent Iron/Cu Nanoparticles with Ficus Benjamina Leaves’ Extract

Detoxification of Cr(VI) using biochar-supported Cu/Fe bimetallic nanoparticles

Synthesis, Mechanism, and Performance Assessment of Zero‐Valent Iron for Metal‐Contaminated Water Remediation: A Review

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