Reduction of As(V) to As(III) by commercial ZVI or As(0) with acid-treated ZVI

Sun, Fenglong; Osseo‐Asare, K.; Chen, Yongsheng; Dempsey, Brian A.

doi:10.1016/j.jhazmat.2011.09.029

Cited by 73 publications

(39 citation statements)

References 48 publications

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“…The very little loss of p-AP production 276 may be caused by the adsorption of p-AP on NZVI surfaces, as it is expected based on FTIR 277 data. Similarly to previous studies showing a continuous decrease in catalytic activity with 278 increase in number of recycling [10,29], the reduction extent slightly decreased to 93% of p-279 NP removal (vs 89% of p-AP production) over 5 cycles (Fig. 5b).…”

Section: Recycling Tests and Effect Of Nabh4 Concentrationsupporting

confidence: 85%

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Effect of NaBH 4 on properties of nanoscale zero-valent iron and its catalytic activity for reduction of p -nitrophenol

Bae

Gim

Kim

et al. 2016

Applied Catalysis B: Environmental

251

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Section: Recycling Tests and Effect Of Nabh4 Concentrationsupporting

confidence: 85%

“…(PBE) exchange-correlation functional [28]. According to the results obtained from our 184 experiments and other references [29], the outer shell of NZVI seemed to be covered by iron 185 oxides especially magnetite form. We thus used a slab model of magnetite that is a (4 × 4) Fe3O4 186…”

Section: Computational Detailsmentioning

confidence: 54%

Effect of NaBH 4 on properties of nanoscale zero-valent iron and its catalytic activity for reduction of p -nitrophenol

Bae

Gim

Kim

et al. 2016

Applied Catalysis B: Environmental

251

View full text Add to dashboard Cite

“…For more than a decade, reductive transformations (degradation of organics and precipitation of inorganics) have been regarded as the fundamental mechanism of contaminant removal in Fe 0 /H 2 O systems 3, 31–34. But the literature contains many contradictory findings regarding the processes of aqueous contaminant removal in the presence of Fe 0 .…”

Section: Introductionmentioning

confidence: 99%

“…These conflicting findings suggest that reductive transformations may not be as important as currently considered. Nevertheless, a “broad consensus” on reductive transformations persists in the literature despite parallel acknowledgment that the real mechanisms of contaminant removal have not yet been completely elucidated 6, 24, 32–34, 39–41.…”

Section: Introductionmentioning

confidence: 99%

Metallic Iron for Water Treatment: A Critical Review

Noubactep¹

2013

CLEAN Soil Air Water

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Water treatment with metallic iron (Fe0) is still based on the premise that Fe0 is a reducing agent. An alternative concept stipulates that contaminants are removed by adsorption, co‐precipitation, and size‐exclusion in a reactive filtration process. This article underlines the universal validity of the alternative concept. It is shown that admixing non‐expansive material to Fe0 as a pre‐requisite for sustainable Fe0‐based filtration systems. Fe0‐based filters are demonstrated an affordable, appropriate, and efficient decentralized water treatment technology.

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“…In the past decades, zero valent iron (ZVI) technologies have been proved as effective approaches to remove various aqueous organic/inorganic contaminants 1 . As a common and cost-effective transition metal, ZVI can act as not only reducing agent directly but also electron-donor in attending oxidative reactions 2 3 4 5 6 7 8 . It is well established that ZVI can be applied in ground water remediation for direct reduction of heavy metal ions e.g.…”

mentioning

confidence: 99%

An insight in magnetic field enhanced zero-valent iron/H2O2 Fenton-like systems: Critical role and evolution of the pristine iron oxides layer

Xiang

Zhang

Zhou

et al. 2016

Sci Rep

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This study demonstrated the synergistic degradation of 4-chlorophenol (4-CP) achieved in a magnetic field (MF) enhanced zero-valent iron (ZVI)/H2O2 Fenton-like (FL) system and revealed an interesting correlative dependence relationship between MF and the pristine iron oxides layer (FexOy) on ZVI particles. First, a comparative investigation between the FL and MF-FL systems was conducted under different experimental conditions. The MF-FL system could suppress the duration of initial lag degradation phase one order of magnitude in addition of the significant enhancement in overall 4-CP degradation. Monitoring of intermediates/products indicated that MF would just accelerate the Fenton reactions to produce hydroxyl radical more rapidly. Evolutions of simultaneously released dissolved iron species suggested that MF would not only improve mass-transfer of the initial heterogeneous reactions, but also modify the pristine ZVI surface. Characterizations of the specific prepared ZVI samples evidenced that MF would induce a special evolution mechanism of the ZVI particles surface depending on the existence of FexOy layer. It comprised of an initial rapid point dissolution of FexOy and a following pitting corrosion of the exposed Fe0 reactive sites, finally leading to appearance of a particular rugged surface topography with numerous adjacent Fe0 pits and FexOy tubercles.

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Reduction of As(V) to As(III) by commercial ZVI or As(0) with acid-treated ZVI

Cited by 73 publications

References 48 publications

Effect of NaBH 4 on properties of nanoscale zero-valent iron and its catalytic activity for reduction of p -nitrophenol

Effect of NaBH 4 on properties of nanoscale zero-valent iron and its catalytic activity for reduction of p -nitrophenol

Metallic Iron for Water Treatment: A Critical Review

An insight in magnetic field enhanced zero-valent iron/H2O2 Fenton-like systems: Critical role and evolution of the pristine iron oxides layer

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