Attapulgite supported nanoscale zero-valent iron in wastewater treatment and groundwater remediation: synthesis, application, performance and limitation

Anang, Emmanuella; Liu, Hong; Fan, Xiaoliang; Asamoah, Ebenezer Nestle

doi:10.1080/21622515.2021.2010131

Cited by 6 publications

(1 citation statement)

References 126 publications

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“…However, some areas showed a mesoporous morphology with bumps and cavities structure that may give the nZVI high effective adsorption capacity as they can increase the possibility of trapping the DC molecules on the nZVI surface 22 . When Rosa damascene extracts were utilized in the synthesis of nZVI the acquired NPs were non-uniform with void space and different shapes which decreased its effectiveness in Cr (VI) adsorption and extends the reaction time 23 . The results are in line with nZVI synthesized by oak and mulberry leaves that were mostly globular nanoparticles with different nano sizes and no significant agglomeration.…”

Section: Resultsmentioning

confidence: 99%

Synergetic effect of green synthesized reduced graphene oxide and nano-zero valent iron composite for the removal of doxycycline antibiotic from water

Abdelfatah

El-Maghrabi

Mahmoud

et al. 2022

Sci Rep

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In this work, the synthesis of an rGO/nZVI composite was achieved for the first time using a simple and green procedure via Atriplex halimus leaves extract as a reducing and stabilizing agent to uphold the green chemistry principles such as less hazardous chemical synthesis. Several tools have been used to confirm the successful synthesis of the composite such as SEM, EDX, XPS, XRD, FTIR, and zeta potential which indicated the successful fabrication of the composite. The novel composite was compared with pristine nZVI for the removal aptitude of a doxycycline antibiotic with different initial concentrations to study the synergistic effect between rGO and nZVI. The adsorptive removal of bare nZVI was 90% using the removal conditions of 25 mg L−1, 25 °C, and 0.05 g, whereas the adsorptive removal of doxycycline by the rGO/nZVI composite reached 94.6% confirming the synergistic effect between nZVI and rGO. The adsorption process followed the pseudo-second order and was well-fitted to Freundlich models with a maximum adsorption capacity of 31.61 mg g−1 at 25 °C and pH 7. A plausible mechanism for the removal of DC was suggested. Besides, the reusability of the rGO/nZVI composite was confirmed by having an efficacy of 60% after six successive cycles of regeneration.

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Section: Resultsmentioning

confidence: 99%

Synergetic effect of green synthesized reduced graphene oxide and nano-zero valent iron composite for the removal of doxycycline antibiotic from water

Abdelfatah

El-Maghrabi

Mahmoud

et al. 2022

Sci Rep

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Enhanced dechlorination of 2,4-dichlorophenol using nanorod palygorskite-loaded Fe/Ni nanoparticles: Performance evaluation, influencing factors and action mechanism of Fe and Ni

Asamoah,

Liu,

Fan

2023

Environmental Technology & Innovation

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The role of nanoscale zero-valent iron (nZVI) in remediation of heavy metal contamination in groundwater overexploitation areas

Fang,

Gao,

et al. 2023

mat express

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This study investigates the remediation of groundwater contaminated with heavy metals in overexploited areas using a modified approach involving the use of corn plant parts to produce biochar. The biochar was modified using a hydrothermal method, employing nanoscale zero-valent iron (nZVI) material to create a composite material for adsorbing heavy metals from water bodies. Adsorption experiments were conducted on the presence of Cr, Cu, and Zn ions in the water. The experimental investigations focused on the dosage of adsorption materials, solution pH, and stability of the adsorption material to validate the enhanced capability of the nanoscale zero-valent iron modified biochar composite (Fe-CBC-MO) for removing and adsorbing heavy metal ions (Cu, Cr, and Zn) from water. The results indicate that the adsorption capacity follows the sequence: Cr > Zn > Cu. Increasing the adsorbent dosage provides more adsorption sites, thereby improving the removal efficiency of heavy metals from water bodies. Considering cost-effectiveness, an optimal dosage of 0.15 g was selected. Under alkaline conditions, Cu and Zn ions precipitated significantly, leading to sustained high removal rates of heavy metals. Correspondingly, the rate constants were also relatively high. In acidic environments, the rate constant for Cr decreased significantly due to corrosion passivation. The composite material Fe-CBC-MO exhibited remarkable removal efficiency for all three heavy metals (Cr, Cu, Zn), demonstrating a strong capability for remediating heavy metal pollution.

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Attapulgite supported nanoscale zero-valent iron in wastewater treatment and groundwater remediation: synthesis, application, performance and limitation

Cited by 6 publications

References 126 publications

Synergetic effect of green synthesized reduced graphene oxide and nano-zero valent iron composite for the removal of doxycycline antibiotic from water

Synergetic effect of green synthesized reduced graphene oxide and nano-zero valent iron composite for the removal of doxycycline antibiotic from water

Enhanced dechlorination of 2,4-dichlorophenol using nanorod palygorskite-loaded Fe/Ni nanoparticles: Performance evaluation, influencing factors and action mechanism of Fe and Ni

The role of nanoscale zero-valent iron (nZVI) in remediation of heavy metal contamination in groundwater overexploitation areas

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