Synthesis and characterizations of nZVI-AC composites from coconut shells and its application for the adsorption of Pb(II) and Cr(VI) ions

Yusmartini, Eka Sri; Ridwan,; Setiabudidaya, Dedi; Faizal, Muhammad; Marsi,

doi:10.1088/1757-899x/509/1/012042

Cited by 3 publications

(3 citation statements)

References 13 publications

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“…As proposed by other studies, if adsorption is regarded as the primary mechanism of immobilization, it can be inferred that in the absence of other reducible substances, a gram of S-nZVI can immobilize up to 328 mg of Pb in an acidic medium like 0.1 M HCl. This value surpasses the 124 mg/g reported by Yusmartini et al [63]. The higher value reported in this work is most likely a consequence of the differences in physical properties of the Fe 0 nanoparticles used in both studies and the medium from which metals are being immobilized.…”

Section: Resultscontrasting

confidence: 71%

Effects of Leaching Agents on Pb and Cd Immobilization in Battery Waste Contaminated Soils Amended with Bare and Stabilized Zero-Valent Iron Nanoparticles

Adedokun,

Ogungbesan,

Anegbe

et al. 2024

NHC

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This study compared the effectiveness of bare zero-valent iron nanoparticles (B-nZVI) and starch-stabilized zero-valent iron nanoparticles (S-nZVI) in immobilizing Pb and Cd from lead-acid battery waste soils. Both B-nZVI and S-nZVI were prepared in almost identical manner using the technique of reducing ferric chloride with sodium borohydride. X-ray diffraction (XRD) and dynamic light scattering (DLS) analyses confirmed that polydisperse B-nZVI and S-nZVI were synthesized. XRD and DLS analyses showed that B-nZVI and S-nZVI had different surface properties. To assess the immobilization capability of B-nZVI and S-nZVI, a composite soil sample was collected from an automobile lead-acid battery waste dumpsite. The soil sample had a pH of 3.85 and Pb and Cd levels of 16,674 mg/kg and 41 mg/kg, respectively. Single extraction procedures using 0.01M CaCl2, 0.1 M HCl, and 0.05 M EDTA were used to simulate phytoavailable Pb and Cd in the soil studied. Batch immobilization analysis showed that Cd was mobile in the control but immobile in B-nZVI and S-nZVI treated soils. Pb was however not immobile in either the control or treated soils. The mobility of Pb however decreased with increasing doses of S-nZVI and 0.003 g of S-nZVI was needed to make Pb completely immobile in soil. Batch immobilization also showed that S-nZVI was 1.8-2.49 times more efficient in immobilizing Pb than B-nZVI. Simulated phytoavailability of Pb was in the order of EDTA > HCl > CaCl2 > H2O while simulated photoavailable Cd was in the order of HCl > EDTA > H2O > CaCl2.

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Section: Resultscontrasting

confidence: 71%

Effects of Leaching Agents on Pb and Cd Immobilization in Battery Waste Contaminated Soils Amended with Bare and Stabilized Zero-Valent Iron Nanoparticles

Adedokun,

Ogungbesan,

Anegbe

et al. 2024

NHC

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“…In addition, band of Fe-O was observed for both these spectra due to the stretching vibration mode of Fe-O bonds during reaction with Cr (VI) (Gecgel et al 2018;Shu et al 2020). The spectrum of nZVI after reaction with Cr (VI) and toluene also showed a strong band between 1540 cm -1 and 1700 cm -1 which can be associated with the aromatic C=C ring stretching (Chen et al 2012;Yusmartini et al 2019), typically showing the presence of bonds made by toluene on nZVI surface.…”

Section: Characterization Of Nzvi Particlesmentioning

confidence: 90%

Impact of Nonaqueous Phase Liquid on Cr(VI) Removal by Nano Zerovalent Iron Particles: Effects of Contact Time, Pollution Load, and pH

Garg

Yadav

Ranjan

et al. 2023

J. Hazard. Toxic Radioact. Waste

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Nanoscale zerovalent iron (nZVI) was synthesized and employed for treating chromium (VI) containing aqueous solution through adsorption using a series of microcosm experiments. The experiments were then performed to study the effects of a light non-aqueous phase liquid (LNAPL), toluene, on Cr (VI) removal by nZVI. Results showed that a maximum removal efficiency of almost 90% was achieved within 300 minutes of the treatment process, while it was suppressed by ~25% in toluene's co-presence. The efficiency was found higher (>80%) at pH 3-7 and reduced to 30.3% at pH 9. No significant change in the removal was observed due to change in pH under toluene's co-presence (57-65% removal for all pH ranges). The removal efficiency also reduced from 62.7% to 37.1% and 82.1 to 28.3% with increase in Cr (VI) concentration (25 to 200 mg/L), with and without co-existing toluene, respectively. Surface morphology and structure of nZVI pre-and post-treatment with Cr (VI) and toluene was analyzed through scanning electron microscopy (SEM), X-ray diffraction (XRD) and Fourier transform infrared (FTIR) spectroscopy.The results confirmed the presence of Cr (VI) and toluene on the nZVI surface. The adsorption of Cr (VI) by nZVI was best described by pseudo second order (PSO) kinetics (R 2 = 0.97 in both the cases) and Langmuir isotherm equilibrium model (R 2 = 0.95, 0.81). The maximum adsorption capacity (Qmax) for Cr (VI) without and with toluene was 64.52 mg/g and 58.47 mg/g of the nZVI particles, respectively. Findings from this study provide crucial information about co-contamination and its noticeable effects on remediation of the contaminants of concern.

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“…Compared with other methods, adsorption method is simple and efficient, thus it is the most commonly used technology for organic pollutants' removal [92]. Due to the rich oxygen-containing functional groups on the surface of various adsorbents [93], adsorption technology is considered to be a typical reaction process for removing Cr(VI) and other heavy metal ions [94]. The adsorption performance of adsorbents depends on the morphology and structure of porous materials, such as specific surface area, pore volume, pore distribution, and special pore surface chemistry [92].…”

Section: Adsorption Mechanismmentioning

confidence: 99%

Application of nanoscale zero-valent iron in hexavalent chromium-contaminated soil: A review

Chen

et al. 2020

Nanotechnology Reviews

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Chromium (Cr) is a common toxic heavy metal that is widely used in all kinds of industries, causing a series of environmental problems. Nanoscale zero- valent iron (nZVI) is considered to be an ideal remediation material for contaminated soil, especially for heavy metal pollutants. As a material of low toxicity and good activity, nZVI has been widely applied in the in situ remediation of soil hexavalent chromium (Cr(vi)) with mobility and toxicity in recent years. In this paper, some current technologies for the preparation of nZVI are summarized and the remediation mechanism of Cr(vi)-contaminated soil is proposed. Five classified modified nZVI materials are introduced and their remediation processes in Cr(vi)-contaminated soil are summarized. Key factors affecting the remediation of Cr(vi)-contaminated soil by nZVI are studied. Interaction mechanisms between nZVI-based materials and Cr(vi) are explored. This study provides a comprehensive review of the nZVI materials for the remediation of Cr(vi)-contaminated soil, which is conducive to reducing soil pollution.

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Synthesis and characterizations of nZVI-AC composites from coconut shells and its application for the adsorption of Pb(II) and Cr(VI) ions

Cited by 3 publications

References 13 publications

Effects of Leaching Agents on Pb and Cd Immobilization in Battery Waste Contaminated Soils Amended with Bare and Stabilized Zero-Valent Iron Nanoparticles

Effects of Leaching Agents on Pb and Cd Immobilization in Battery Waste Contaminated Soils Amended with Bare and Stabilized Zero-Valent Iron Nanoparticles

Impact of Nonaqueous Phase Liquid on Cr(VI) Removal by Nano Zerovalent Iron Particles: Effects of Contact Time, Pollution Load, and pH

Application of nanoscale zero-valent iron in hexavalent chromium-contaminated soil: A review

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