Fenton Reaction Driven by Iron Ligands

Salgado, Pablo; Melín, Victoria; Contreras, David; Moreno, Yanko; Mansilla, Héctor D.

doi:10.4067/s0717-97072013000400043

Cited by 107 publications

(71 citation statements)

References 99 publications

(121 reference statements)

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“…When the pH is approximately neutral, a range from approximately 4 to 8, the solubility of iron is relatively low, but as the pH drops below 4, the fractional solubility of iron rapidly increases, up to nearly 35%. This behavior is consistent with the speciation of Fe(III), determined using the standard selection in the Mineql + database to create an Fe(III) speciation diagram [74], where below a pH of approximately 3, the abundance of dissolved Fe(III) sharply increases [75][76][77]. This suggests that dissolved Fe(III) production is a consequence of acidic reactions in the atmosphere as would be expected for acidic species acting on a largely Fe(III) oxide composition.…”

Section: Discussionsupporting

confidence: 53%

Enhanced Iron Solubility at Low pH in Global Aerosols

et al. 2018

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Abstract:The composition and oxidation state of aerosol iron were examined using synchrotron-based iron near-edge X-ray absorption spectroscopy. By combining synchrotron-based techniques with water leachate analysis, impacts of oxidation state and mineralogy on aerosol iron solubility were assessed for samples taken from multiple locations in the Southern and the Atlantic Oceans; and also from Noida (India), Bermuda, and the Eastern Mediterranean (Crete). These sampling locations capture iron-containing aerosols from different source regions with varying marine, mineral dust, and anthropogenic influences. Across all locations, pH had the dominating influence on aerosol iron solubility. When aerosol samples were approximately neutral pH, iron solubility was on average 3.4%; when samples were below pH 4, the iron solubility increased to 35%. This observed aerosol iron solubility profile is consistent with thermodynamic predictions for the solubility of Fe(III) oxides, the major iron containing phase in the aerosol samples. Source regions and transport paths were also important factors affecting iron solubility, as samples originating from or passing over populated regions tended to contain more soluble iron. Although the acidity appears to affect aerosol iron solubility globally, a direct relationship for all samples is confounded by factors such as anthropogenic influence, aerosol buffer capacity, mineralogy and physical processes.

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Section: Discussionsupporting

confidence: 53%

Enhanced Iron Solubility at Low pH in Global Aerosols

et al. 2018

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“…But the HULIS itself becomes depleted by the Fenton oxidation when it remains as the only reductant (Salgado et al, 2013).…”

Section: Oxidation Of Organic Aerosol Particles Containing Black and mentioning

confidence: 99%

“…In biological systems, 1,2-dihydroxy benzenes (catecholamines) regulate the Fenton reaction and orient it toward different reaction pathways (Salgado et al, 2013).…”

Section: Oxidation Of Organic Aerosol Particles Containing Black and mentioning

confidence: 99%

Climate engineering by mimicking natural dust climate control: the iron salt aerosol method

et al. 2017

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Abstract. Power stations, ships and air traffic are among the most potent greenhouse gas emitters and are primarily responsible for global warming. Iron salt aerosols (ISAs), composed partly of iron and chloride, exert a cooling effect on climate in several ways. This article aims firstly to examine all direct and indirect natural climate cooling mechanisms driven by ISA tropospheric aerosol particles, showing their cooperation and interaction within the different environmental compartments. Secondly, it looks at a proposal to enhance the cooling effects of ISA in order to reach the optimistic target of the Paris climate agreement to limit the global temperature increase between 1.5 and 2 • C.Mineral dust played an important role during the glacial periods; by using mineral dust as a natural analogue tool and by mimicking the same method used in nature, the proposed ISA method might be able to reduce and stop climate warming. The first estimations made in this article show that by doubling the current natural iron emissions by ISA into the troposphere, i.e., by about 0.3 Tg Fe yr −1 , artificial ISA would enable the prevention or even reversal of global warming. The ISA method proposed integrates technical and economically feasible tools.

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“…Iron or Ferrum (Fe) is a silvery-white metal, clay, and can be formed. It has been conducted a study of adsorption of metal cations Fe(III) in aqueous systems using zeolite, in the determination of adsorption of metal cations Fe +3 performed at pH area between 1-6 [1]. Lead was widely used in the paint factory, fuel, battery industry and ammunition bullets.…”

Section: Introduction:-mentioning

confidence: 99%

Study of Pb(ii) and Fe(iii) Metal Cations Adsorption Into P-Tert-Butylcalix[4]arene as Adsorbent: Kinetic Adsorption.

Busroni¹,

Siswanta²,

SantosaS³

et al. 2017

IJAR

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This research explain the study about compound of 5,11,17,26,27,arene (TBCA) that will be used as adsorption material for heavy metal cations. Adsorption using immersion method with variations such as the value of acidity (pH), time of exposure and initial concentration of metal cations have been conducted. The results of each investigation showed that the optimum pH of adsorption was at pH = 5 for metal cations of Pb(II) and Fe (III). The observation results showed the optimum time exposure of cation adsorption of Pb(II) and Fe(III) was 90 minutes. Study about kinetic adsorption of Pb(II) metal cations of the adsorbent refered the Ho kinetic model, pseudo second order with rate constant of adsorption 143x10 -3 g.mol -1 .min -1 and Fe(III) refered the Lagergren kinetics model, pseudo first order with the rate constant of 9.21 x 10 -3 min -1 . The observation of the study showed that the isotherms adsorption for metal cations of Pb(II) and Fe(III) refered the pattern trend of Langmuir isotherm models. The value of the optimum capacity for metal cation adsorption Pb(II) and Fe(III) each was 128.46 mg/g and 156.09 mg/g respectively. Adsorption energy for Pb(II) and Fe(III) was 5.81 k.J/mol and 7.01 kJ / mol, respectively. …………………………………………………………………………………………………….... Introduction:-The existence of the metal cations can endanger human health as heavy metals if enter into the body, because the heavy metals are toxic/poison. Heavy metals are chemical elements with a specific gravity greater than 5 g/cm 3 that located in the lower right corner of the periodic table system. Iron or Ferrum (Fe) is a silvery-white metal, clay, and can be formed. It has been conducted a study of adsorption of metal cations Fe(III) in aqueous systems using zeolite, in the determination of adsorption of metal cations Fe +3 performed at pH area between 1-6 [1]. Lead was widely used in the paint factory, fuel, battery industry and ammunition bullets. Lead is toxic which very influenced toward children, because the paint is widely used in residences. If the metal contains in the blood up to 10 mg/mL, it can cause illness symtoms and Pb(II) concentrations in the water does not depend on the season, but on the depth. Lead ions contained in the water can get into the body of the fish and other aquatic animals [2]. Siswanta research resulted that the adsorbent Calix[4]resorcinarene, hybrid or Calix[4]resorcinarene-chitosan and chitosan can be applied to eliminate the Pb(II) metal ions. The results of the investigation explained that the value of adsorption capacity was Calix[4]resorcinaren > Chitosan > Calix [4] resorcinarene-chitosan (hybrid) [3]. Prabawati, reported that it can be synthesized compounds of p-t.butyl-37-monoallyloxy-38,39,40,41,42-pentahidroxycalix[6]arene and p-t.butyl-

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Fenton Reaction Driven by Iron Ligands

Cited by 107 publications

References 99 publications

Enhanced Iron Solubility at Low pH in Global Aerosols

Enhanced Iron Solubility at Low pH in Global Aerosols

Climate engineering by mimicking natural dust climate control: the iron salt aerosol method

Study of Pb(ii) and Fe(iii) Metal Cations Adsorption Into P-Tert-Butylcalix[4]arene as Adsorbent: Kinetic Adsorption.

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