Characterization of iron in airborne particulate matter

Tavares, Fernanda Vasconcelos Fonseca; Ardisson, José D.; Rodrigues, Paulo César Horta; Brito, Walter Ricardo; Macedo, W. A. A.; Jacomino, Vanusa Maria Feliciano

doi:10.1007/s10751-013-0823-8

Cited by 5 publications

(2 citation statements)

References 16 publications

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“…9 However, maximum uptake capacity, time, recyclability, applicable conditions/versatility, cost, and simplicity of operation are some major challenges for the prototype/industrial use. 10 Highly environmentally available iron and iron oxide (a major component of airborne dust particles) 11 have also been found to be of great interest in environmental remediation and understanding of atmospheric processes. 12−14 The surface morphology and passivation/capping of the nanoparticles can be manipulated to obtain a fruitful remediation application.…”

Section: Introductionmentioning

confidence: 99%

“…Highly environmentally available iron and iron oxide (a major component of airborne dust particles) have also been found to be of great interest in environmental remediation and understanding of atmospheric processes. − The surface morphology and passivation/capping of the nanoparticles can be manipulated to obtain a fruitful remediation application. The property of water affinity (hydrophobicity/hydrophilicity) of the surface is also noteworthy in this regard. − …”

Section: Introductionmentioning

confidence: 99%

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Novel Technology for the Removal of Brilliant Green from Water: Influence of Post-Oxidation, Environmental Conditions, and Capping

Ganguly

Ariya

2019

ACS Omega

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Chemical dyes are used in a wide range of anthropogenic activities and are generally not biodegradable. Hence, sustainable recycling processes are needed to avoid their accumulation in the environment. A one-step synthesis of Fe core –maghemite shell (Fe–MM) for facile, instantaneous, cost-effective, sustainable, and efficient removal of brilliant green (BG) dye from water has been reported here. The homogenous and monolayer type of adsorption is, to our knowledge, the most efficient, with a maximum uptake capacity of 1000 mg·g –1 , for BG on Fe–MM. This adsorbent was shown to be efficient in occurring in time-scales of seconds and to be readily recyclable (ca. 91%). As iron/iron oxide possesses magnetic behavior, a strong magnet could be used to separate Fe–MM coated with BG. Thus, the recycling process required a minimum amount of energy. Capping Fe–MM by hydrophilic clay minerals further enhanced the BG uptake capacity, by reducing unwanted aggregation. Interestingly, capping the adsorbent by hydrophobic plastic (low-density polyethylene) had a completely inverse effect on clay minerals. BG removal using this method is found to be quite selective among the five common industrial dyes tested in this study. To shed light on the life cycle analysis of the composite in the environment, the influence of selected physicochemical factors ( T , pH, h ν, O 3 , and NO 2 ) was examined, along with four types of water samples (melted snow, rain, river, and tap water). To evaluate the potential limitations of this technique, because of likely competitive reactions with metal ion contaminants in aquatic systems, additional experiments with 13 metal ions were performed. To decipher the adsorption mechanism, we deployed four reducing agents (NaBH 4 , hydrazine, LiAlH 4 , and polyphenols in green tea) and NaBH 4 , exclusively, favored the generation of an efficient adsorbent via aerial oxidation. The drift of electron density from electron-rich Fe core to maghemite shells was attributed to be responsible for the electrostatic adsorption of N + in BG toward Fe–MM. This technology is deemed to be environmentally sustainable in environmental remediation, namely, in waste management protocol.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Novel Technology for the Removal of Brilliant Green from Water: Influence of Post-Oxidation, Environmental Conditions, and Capping

Ganguly

Ariya

2019

ACS Omega

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Evaluation of atmospheric particulate matter from an industrial area in Southeast Brazil

Mimura

Ferreira

Silva

2020

Environ Monit Assess

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Ferruginous compounds in the airborne particulate matter of the metropolitan area of Belo Horizonte, Minas Gerais, Brazil

Tavares¹,

Ardisson²,

Rodrigues³

et al. 2017

Environ Sci Pollut Res

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Samples of soil, iron ore, and airborne particulate matter (size <10 μm) were analyzed with the main goal of investigating the differentiating physicochemical properties of their ferruginous compounds. These data were used to identify whether the sources of airborne particulate matter in the metropolitan area of Belo Horizonte, Minas Gerais, Brazil, are either from natural origin, as, for instance, re-suspension of particles from soil, or due to anthropogenic activities, meaning that it would be originated from the many iron ore minings surrounding the metropolitan area. Numerical simulations were used to model the atmospheric dispersion of the airborne particulate matter emitted by iron mining located at the Iron Quadrangle geodomain, Minas Gerais. Results from these numerical simulations supported identifying the sites with the highest concentrations of airborne particulate matter in the metropolitan area. Samples of these suspended materials were collected at the selected sites by using high-volume air samplers. The physicochemical features of the solid materials were assessed by X-ray fluorescence, X-ray diffraction, magnetometry, and Fe Mössbauer spectroscopy. The soil materials were found to be rich in quartz, aluminum, organic matter, and low contents of iron, mainly as low crystalline iron oxides. The samples of the iron ores, on the other hand, contain high concentration of iron, dominantly as relatively pure and crystalline hematite (α-FeO). The samples of the airborne particulate matter are rich in iron, mainly as hematite, but contained also quartz, aluminum, and calcium. Mössbauer spectroscopy was used to evaluate the hyperfine structure of Fe of the hematite both from the iron ore and the soil samples. The structural characteristics of the hematite of these particulate materials were further explored. The direct influence of the iron ore mining on the composition of the airborne particulate matter was clearly evidenced based on the trace ability of hematite to its source of emission. Even the atmospheric air on regions relatively far away from the mining activities is also significantly influenced.

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Characterization of iron in airborne particulate matter

Cited by 5 publications

References 16 publications

Novel Technology for the Removal of Brilliant Green from Water: Influence of Post-Oxidation, Environmental Conditions, and Capping

Novel Technology for the Removal of Brilliant Green from Water: Influence of Post-Oxidation, Environmental Conditions, and Capping

Evaluation of atmospheric particulate matter from an industrial area in Southeast Brazil

Ferruginous compounds in the airborne particulate matter of the metropolitan area of Belo Horizonte, Minas Gerais, Brazil

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