Ferrates for water remediation

Mura, Stefania; Malfatti, Luca; Greppi, G.F.; Innocenzi, Plinio

doi:10.1007/s11157-016-9416-8

Cited by 14 publications

(4 citation statements)

References 139 publications

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“…Previous study has determined that the second-order rate constants for the reaction of Fe(VI) with MC-LR, one of the most abundant species of the MCs, are in the range of 8.1AE0.08 M -1 $s -1 to 1.3AE0.1 Â 10 2 M -1 $s -1 within the pH range of 7.5-10.0 (Jiang et al, 2014). Through a series of reaction steps including the hydroxylation of the aromatic ring, the cleavage of the olefinic double bonds, and the fragmentation of the cyclic MC-LR structure (Jiang et al, 2014;Mura et al, 2017;Islam et al, 2018), the ecotoxicity of MC-LR can be significantly reduced.…”

Section: Microcystinsmentioning

confidence: 99%

Application of Fe(VI) in abating contaminants in water: State of art and knowledge gaps

Wang

Shao

Qiao

et al. 2020

Front. Environ. Sci. Eng.

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The past two decades have witnessed the rapid development and wide application of Fe(VI) in the field of water de-contamination because of its environmentally benign character. Fe(VI) has been mainly applied as a highly efficient oxidant/disinfectant for the selective elimination of contaminants. The in situ generated iron(III) (hydr)oxides with the function of adsorption/coagulation can further increase the removal of contaminants by Fe(VI) in some cases. Because of the limitations of Fe(VI) per se, various modified methods have been developed to improve the performance of Fe(VI) oxidation technology. Based on the published literature, this paper summarized the current views on the intrinsic properties of Fe(VI) with the emphasis on the self-decay mechanism of Fe(VI). The applications of Fe (VI) as a sole oxidant for decomposing organic contaminants rich in electron-donating moieties, as a bi-functional reagent (both oxidant and coagulant) for eliminating some special contaminants, and as a disinfectant for inactivating microorganisms were systematically summarized. Moreover, the difficulties in synthesizing and preserving Fe(VI), which limits the large-scale application of Fe (VI), and the potential formation of toxic byproducts during Fe(VI) application were presented. This paper also systematically reviewed the important nodes in developing methods to improve the performance of Fe(VI) as oxidant or disinfectant in the past two decades, and proposed the future research needs for the development of Fe(VI) technologies.

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Section: Microcystinsmentioning

confidence: 99%

Application of Fe(VI) in abating contaminants in water: State of art and knowledge gaps

Wang

Shao

Qiao

et al. 2020

Front. Environ. Sci. Eng.

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“…Synthesis is a two-step process where pure product is created, thus, the amount of waste produced during production is significantly decreased. In addition, the requirements for product cleaning decrease (Kubiňáková, 2015;Eng, 2006;Jiang, 2002;Jiang, 2017;Mura, 2017;Mácová, 2009;Thompson, 1951). Ferrates break down stable inorganic, organic, and biological substances without carcinogenic or toxic products.…”

Section: Introductionmentioning

confidence: 99%

“…They are called a "green oxidant" and during the decomposition, only substances commonly found in the environment (iron oxides and hydroxides) are formed. These substances are also coagulating, disinfecting, and oxidizing agents in water (Mura, 2017;Mácová, 2009). Considering these properties, they can be used in various fields; e.g.…”

Section: Introductionmentioning

confidence: 99%

Stability of ferrate during long-term storage

Benköová

Mališová

Peciar

et al. 2023

Acta Chimica Slovaca

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Surface water and groundwater are polluted with pharmaceuticals, detergents, pesticides, and many other substances. Application of ferrates seems to be a perspective option for wastewater treatment as ferrates are not only powerful oxidizing agents but also an excellent disinfecting and coagulating agents decomposing many stable inorganic, organic, and biological compounds. Final products of their decomposition do not include carcinogenic or toxic products. In this paper, stability of electrochemically prepared potassium ferrate encapsulated in packaging materials printed on a 3D printer was monitored. In the experiment, electrochemically prepared potassium ferrate with different purity (21.4 %, 63.5 % and 67.3 %) was used. Stability of potassium ferrate was monitored for one month and that of other ferrates for three months. Different storage conditions of ferrate samples were also compared. Storage conditions had a significant influence on the ferrate stability.

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“…Tetraoxy high-valent iron anions, which are generally known as ferrates (ferrate(VI) Fe(VI)O 4 2– , and ferrate(V) Fe(V)O 4 3– ), , have attracted the interest of the scientific community due to their abundance in nature, environmental friendly quality, water purification capability, , and easy removal after use. Ferrates in water are able to oxidize a large variety of organic compounds, and their depollution capability has been demonstrated over a wide range of pHs .…”

Section: Introductionmentioning

confidence: 99%

Graphene Oxide/Iron Oxide Nanocomposites for Water Remediation

Mura

Jiang

Vassalini

et al. 2018

ACS Appl. Nano Mater.

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Graphene oxide/iron (III−VI) oxides nanocomposites have been produced with a fast and one-pot synthesis. K 2 FeO 4 (Fe(VI)-based compound), obtained from a dry synthesis, has been used as a green oxidant of graphite to produce graphene oxide, avoiding the use of the toxic permanganates. Graphene oxide flakes with a low oxidation degree and decorated with iron oxide have been obtained in one-step reaction. The material has been characterized by several techniques to investigate the structure (SEM, TEM analysis), the composition (X-ray fluorescence, XPS, FTIR, UV− visible, fluorescence, and Raman spectroscopy) and the performance (HPLC). The combined use of ferrate and graphene oxide/iron oxide is an efficient, cheap, and green alternative for water remediation. Real water samples containing different types of emerging pollutants (organic dyes, pesticides, and pharmaceutical drugs) have been efficiently decontaminated obtaining an abatement of 99% in a few minutes. The nanocomposite is paramagnetic and can be easily removed from water with a magnet after depollution. The materials have shown one of the best decontamination performance reported in the scientific literature so far.

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Ferrates for water remediation

Cited by 14 publications

References 139 publications

Application of Fe(VI) in abating contaminants in water: State of art and knowledge gaps

Application of Fe(VI) in abating contaminants in water: State of art and knowledge gaps

Stability of ferrate during long-term storage

Graphene Oxide/Iron Oxide Nanocomposites for Water Remediation

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