Heterogeneous nZVI-induced Fenton oxidation process to enhance biodegradability of excavation by-products

Vilardi, Giorgio; Sebastiani, Diego; Miliziano, S.; Palma, Luca Di

doi:10.1016/j.cej.2017.10.152

Cited by 85 publications

(23 citation statements)

References 49 publications

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“…nanoparticles (nZVI) have attracted a great deal of attention due to their efficiency in removal of different types of contaminants from aqueous solutions. nZVI are characterized by a core-shell structure, with the core made of metallic iron and the shell constituted of oxide and hydroxydes of Fe(II) and Fe(III) 13 . Relatively little is known about the potential of using nanoparticles for the removal of Cr(VI) from aqueous systems.…”

mentioning

confidence: 99%

Remediation of hexavalent chromium contaminated water through zero-valent iron nanoparticles and effects on tomato plant growth performance

Brasili

Bavasso

Petruccelli

et al. 2020

Sci Rep

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124

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Contaminated water with hexavalent chromium Cr(VI) is a serious environmental problem. This study aimed to evaluate the Cr(VI) removal by zero valent iron nanoparticles (nZVI) reduction process and the impact of Cr(VI), nZVI and combined treatment with nZVI and Cr(VI) on tomato growth performance. To evaluate the Cr(VI) toxic effect on germination capability, seeds were exposed to increasing Cr(VI) concentrations up to 1000 mg L −1. The inhibition of seed germination and the decrease of hypocotyl and root length started from Cr(VI) 5 mg L −1. Under treatment with Cr(VI) + nZVI 5 mg L −1 , seed germination, hypocotyl and root length resulted significantly higher compared to Cr(VI) 5 mg L −1 treatment. The impact of only nZVI was investigated on chlorophyll and carotenoid in leaves; iron levels in leaves, roots, fruits and soil; carotenoid, fat-soluble vitamin and nicotianamine in mature fruits. A significant increase of leaf chlorophyll and carotenoids was observed after nZVI 5 mg L −1 treatment compared to controls. No significant variations were observed in carotenoids, fat-soluble vitamins and nicotianamine levels after treatment with nZVI 5 mg L −1 in mature fruits. For their ability to reduce Cr(VI) and to stimulate tomato growth, nZVI might to be considered as alternative for remediation purposes. According to the Agency for Toxic Substances and Disease Registry and the International Agency for Research on Cancer, chromium (Cr) has been ranked 7 th among the top 20 hazardous substances and no.1 carcinogen 1,2. Cr occurs in different oxidation states (−2 to + 6), but hexavalent chromate Cr(VI) and trivalent chromite Cr(III) forms are the most common and stable in the natural environment 3. Compared to Cr(III), Cr(VI) is highly mobile in soil, extremely toxic to living organisms with mutagenic, carcinogenic and teratogenic potential 4. On the other hand, Cr(III) is significantly less toxic and serves as an essential element in trace amounts. Environmental contamination of Cr(VI) is gaining increasing consideration worldwide due to its high levels in the water and soil deriving from natural and anthropogenic activities including industrial applications such as metallurgical, refractories and chemicals 3. The exposure to Cr(VI) can cause several serious diseases in nervous, kidney, hematopoietic and gastrointestinal systems of humans 5-7. Cr(VI) is also a toxic heavy metal for plants and it is harmful to their development and metabolism, interfering with plant growth, nutrient uptake and photosynthesis, inducing enhanced generation of reactive oxygen species, causing lipid peroxidation and altering the antioxidant activities 8. It is also important to stress that Cr uptake by crops and accumulation in edible plant parts organs with serious risks for consumer health 5,9. In order to remove Cr(VI) from soil and water and eventually reuse the reclaimed water for irrigation purposes, several methods have been researched and reviewed extensively. These include chemical reduction to Cr(III), solvent extraction, chelat...

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confidence: 99%

Remediation of hexavalent chromium contaminated water through zero-valent iron nanoparticles and effects on tomato plant growth performance

Brasili

Bavasso

Petruccelli

et al. 2020

Sci Rep

Self Cite

124

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“…The • OH radicals may also be produced in a reductive environment (Cao et al 2013;Le et al 2011;Vilardi et al 2018). It has been shown that an addition of zero-valent iron (ZVI, Fe 0 ) to an aerated water solution yields the precursors reactants (Fe 2+ and H 2 O 2 ) through a sequence of reactions (ZF1-ZF3, Table 1) (Kang et al 2017).…”

Section: Heterogeneous Fenton Reactionmentioning

confidence: 99%

Treatment of organic pollutants by homogeneous and heterogeneous Fenton reaction processes

Jain¹,

Singh²,

Kim

et al. 2018

Environ Chem Lett

310

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Nowadays, the water ecosystem is being polluted due to the rapid industrialization and massive use of antibiotics, fertilizers, cosmetics, paints, and other chemicals. Chemical oxidation is one of the most applied processes to degrade contaminants in water. However, chemicals are often unable to completely mineralize the pollutants. Enhanced pollutant degradation can be achieved by Fenton reaction and related processes. As a consequence, Fenton reactions have received great attention in the treatment of domestic and industrial wastewater effluents. Currently, homogeneous and heterogeneous Fenton processes are being investigated intensively and optimized for applications, either alone or in a combination of other processes. This review presents fundamental chemistry involved in various kinds of homogeneous Fenton reactions, which include classical Fenton, electro-Fenton, photo-Fenton, electro-Fenton, sono-electro-Fenton, and solar photoelectron-Fenton. In the homogeneous Fenton reaction process, the molar ratio of iron(II) and hydrogen peroxide, and the pH usually determine the effectiveness of removing target pollutants and subsequently their mineralization, monitored by a decrease in levels of total organic carbon or chemical oxygen demand. We present catalysts used in heterogeneous Fenton or Fenton-like reactions, such as H 2 O 2-Fe 3+ (solid)/nano-zero-valent iron/immobilized iron and electro-Fenton-pyrite. Surface properties of heterogeneous catalysts generally control the efficiency to degrade pollutants. Examples of Fenton reactions are demonstrated to degrade and mineralize a wide range of water pollutants in real industrial wastewaters, such as dyes and phenols. Removal of various antibiotics by homogeneous and heterogeneous Fenton reactions is exemplified.

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“…Various technologies have been adopted for the degradation of dyes from wastewater, including advanced oxidation processes (AOPs), adsorption, biological and chemical methods, and the use of membrane modules [8][9][10]. Fenton oxidation-based AOPs are among the most effective processes because of their relative ease of operation, low-cost facility, and high removal efficiency [11,12]. The Fenton process oxidizes organic pollutants using hydroxyl radicals (HO•), which are generated from the hydrogen peroxide (H 2 O 2 )-ferrous sulfate reaction in an acidic medium [13].…”

Section: Introductionmentioning

confidence: 99%

Efficient Degradation of Mordant Blue 9 Using the Fenton-Activated Persulfate System

Pervez

Telegin

Cai

et al. 2019

Water

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In this study, a Fenton-activated persulfate (Fe 2+ /PS) system was introduced for the efficient degradation of Mordant Blue 9 (MB 9) as a textile dye in an aqueous solution. Results showed that the degradation of MB 9 was markedly influenced by operational parameters, such as initial pH, PS concentration, Fe 2+ concentration, and initial dye concentration. Optimal reaction conditions were then determined. Inorganic anions, such as Cl − and HCO 3 − , enhanced the degradation efficiency of MB 9 under optimal conditions. Addition of HCO 3 − reduced the degradation performance of MB 9, whereas the addition of Cl − increased the degradation percentage of MB 9. In addition, quenching experiments were conducted using methanol and tert-butyl alcohol as scavengers, and methanol was identified as an effective scavenger. Thus, the degradation of MB 9 was attributed to SO •− 4 and • OH radicals. The degradation and mineralization efficiency of MB 9 was significantly reduced using the conventional Fenton process i.e., Fe 2+ / hydrogen peroxide (HP) because of the formation of a Fe complex during degradation. Meanwhile, the Fe 2+ /persulfate (PS) system improved the degradation and mineralization performance.

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Heterogeneous nZVI-induced Fenton oxidation process to enhance biodegradability of excavation by-products

Cited by 85 publications

References 49 publications

Remediation of hexavalent chromium contaminated water through zero-valent iron nanoparticles and effects on tomato plant growth performance

Remediation of hexavalent chromium contaminated water through zero-valent iron nanoparticles and effects on tomato plant growth performance

Treatment of organic pollutants by homogeneous and heterogeneous Fenton reaction processes

Efficient Degradation of Mordant Blue 9 Using the Fenton-Activated Persulfate System

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