Immobilisation of metal(loid)s in two contaminated soils using micro and nano zerovalent iron particles: Evaluating the long-term stability

Danila, Vaidotas; Kumpienė, Jūratė; Kasiulienė, Alfreda; Vasarevičius, Saulius

doi:10.1016/j.chemosphere.2020.126054

Cited by 47 publications

(12 citation statements)

References 45 publications

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“…In recent years, nanoscale zero-valent iron particles (nZVFe) with sizes ranging from 1 to 100 nm at least one dimension have shown good potential as an environmentally friendly strong reducing agent for removing various pollutant [13], for instance, HMs such as nickel (Ni), cadmium (Cd), copper (Cu), hexavalent chromium [Cr(VI)], cobalt (Co), arsenic (As), mercury (Hg), and lead (Pb) from wastewater and polluted water [14][15][16]. As a result of their high surface energy, direct interparticle interactions, and intrinsic magnetic interaction, bare iron nanoparticles (NPs) tend to agglomerate into micron or larger solid particles.…”

Section: Introductionmentioning

confidence: 99%

Pb(II) Removal from Aqueous Solutions by Adsorption on Stabilized Zero-Valent Iron Nanoparticles—A Green Approach

Sepehri

Kanani

Abdoli

et al. 2023

Water

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Nano zero-valent iron particles (nZVFe) are known as one of the most effective materials for the treatment of contaminated water. However, a strong tendency to agglomerate has been reported as one of their major drawbacks. The present study describes a green approach to synthesizing stabilized nZVFe, using biomass as a porous support material. Therefore, in the first step, biomass-derived activated carbon was prepared by thermochemical procedure from rice straw (RSAC), and then the RSAC-supported nZVFe composite (nZVFe–RSAC) was employed to extract Pb(II) from aqueous solution and was successfully synthesized by the sodium borohydride reduction method. It was confirmed through scanning electron microscopy (SEM) and X-ray diffraction (XRD) characteristics that the nZVFe particles are uniformly dispersed. Results of the batch experiments showed that 6 (g L−1) of this nanocomposite could effectively remove about 97% of Pb(II) ions at pH = 6 from aqueous solution. The maximum adsorption capacities of the RS, RSAC, and nZVFe–RSAC were 23.3, 67.8, and 140.8 (mg g−1), respectively. Based on the results of the adsorption isotherm studies, the adsorption of Pb(II) on nZVFe–RSAC is consistent with the Langmuir–Freundlich isotherm model R2=0.996). The thermodynamic outcomes exhibited the endothermic, possible, and spontaneous nature of adsorption. Adsorption enthalpy and entropy values were determined as 32.2 kJ mol−1 and 216.9 J mol−1 K−1, respectively. Adsorption kinetics data showed that Pb(II) adsorption onto nZVFe–RSAC was fitted well according to a pseudo-second-order model. Most importantly, the investigation of the adsorption mechanism showed that nZVFe particles are involved in the removal of Pb(II) ions through two main processes, namely Pb adsorption on the surface of nZVFe particles and direct role in the redox reaction. Subsequently, all intermediates produced through the redox reaction between nZVFe and Pb(II) were adsorbed on the nZVFe–RSAC surface. According to the results of the NZVFe–RSAC recyclability experiments, even after five cycles of recovery, this nanocomposite can retain more than 60% of its initial removal efficiency. So, the nZVFe–RSAC nanocomposite could be a promising material for permeable reactive barriers given its potential for removing Pb(II) ions. Due to low-cost and wide availability of iron salts as well as rice biowaste, combined with the high adsorption capacity, make nZVFe–RSAC an appropriate choice for use in the field of Pb(II) removal from contaminated water.

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Section: Introductionmentioning

confidence: 99%

Pb(II) Removal from Aqueous Solutions by Adsorption on Stabilized Zero-Valent Iron Nanoparticles—A Green Approach

Sepehri

Kanani

Abdoli

et al. 2023

Water

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“…58 Finally, higher adsorption of metal(loid)s could be expected when ferrihydrite is present due to its higher surface area compared to more crystalline Fe oxides. 20,59…”

Section: Resultsmentioning

confidence: 99%

“…Most importantly, the long-term behaviour of soil amendments is rarely studied, although there may be release of inorganic contaminants previously retained by BC 18 and nZVI. 19,20 In addition, studying Fe solid speciation after nZVI and nZVI composites application is of key importance in terms of immobilisation efficiency because the large range of Fe oxyhydroxides that can be produced (depending on chemical conditions) 21 may influence and change the availability and partitioning of inorganic contaminants. 22 To solve the gap in the knowledge concerning the behaviour of nZVI, BC, and nZVI-BC in the long term, we performed experiments of more than 1 year duration using an interdisciplinary approach.…”

Section: Introductionmentioning

confidence: 99%

Revealing the long-term behaviour of nZVI and biochar in metal(loid)-contaminated soil: focus on Fe transformations

Mitzia,

Vítková,

Ratié

et al. 2023

Environ. Sci.: Nano

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“…Zero-valent iron (ZVI) can be one potential low-cost and environmentally friendly material for HM-contaminated soil/groundwater remediation by which a variety of metal cations and oxyanions could be sequestrated through a combination of transformation, adsorption, and coprecipitation processes. − To achieve effective HM sequestration by ZVI, the growth and accumulation of iron (hydr)oxides that are formed during the corrosion of ZVI are believed to be important. − However, the reactivity of traditional ZVI particles is generally low since commercial ZVI is always covered with an intrinsic passive oxide film (formed during its manufacturing process), which can significantly hinder the mass transfer of the solutes toward or away from the ZVI surface . In addition, the presence of HA could further complicate the sequestration process of HMs by interfering with the corrosion of ZVI and the interactions between iron (hydr)oxides and HMs. − As a consequence, the passivating oxide layer may make the remediation of HM-containing waters and soils by ZVI challenging, especially when the HMs are chelated with HA.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Sequestration of Humic Acid-Complexed Pb(II), Zn(II), Cd(II), and As(V) by Sulfidated Zero-Valent Iron: Performance and Stability of Sequestration Products

Liu

Qiao

Sun

et al. 2022

Environ. Sci. Technol.

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Heavy metal(loid)s (HMs) such as Pb(II), Zn(II), Cd(II), and As(V) are ubiquitously present in co-contaminated soil and shallow groundwater, where the humic acid (HA)-rich environments can significantly influence their sequestration. In this study, sulfidated zero-valent iron (S-ZVI) was found to be able to simultaneously sequestrate these HA-complexed HMs. Specially, the HA-complexed Pb(II), Zn(II), Cd(II), and As(V) could be completely removed by S-ZVI within 60 min, while only 35–50% of them could be sequestrated within 72 h by unsulfidated ZVI. Interestingly, different from the S-ZVI corrosion behavior, the kinetics of HM sequestration by S-ZVI consisted of an initial slow reaction stage (or a lag phase) and then a fairly rapid reaction process. Characterization results indicated that forming metal sulfides controlled the HM sequestration at the first stage, whereas the enhanced ZVI corrosion and thus-improved adsorption and/or coprecipitation by iron hydroxides governed the second stage. Both metal–oxygen and metal–sulfur bonds in the solid phase could be confirmed by X-ray photoelectron spectroscopy and extended X-ray absorption fine structure analysis. Moreover, the transformation of S species from SO4 2–, SO3 2–, and S2 2– to S2– under reducing conditions could allow the sequestrated HMs to remain stable over a long period.

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Immobilisation of metal(loid)s in two contaminated soils using micro and nano zerovalent iron particles: Evaluating the long-term stability

Cited by 47 publications

References 45 publications

Pb(II) Removal from Aqueous Solutions by Adsorption on Stabilized Zero-Valent Iron Nanoparticles—A Green Approach

Pb(II) Removal from Aqueous Solutions by Adsorption on Stabilized Zero-Valent Iron Nanoparticles—A Green Approach

Revealing the long-term behaviour of nZVI and biochar in metal(loid)-contaminated soil: focus on Fe transformations

Simultaneous Sequestration of Humic Acid-Complexed Pb(II), Zn(II), Cd(II), and As(V) by Sulfidated Zero-Valent Iron: Performance and Stability of Sequestration Products

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