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Кузманн, Э.; Garg, V. K.; Júnior, Paulo Antônio de Souza; Schuch, Luiz Alexandre; Oliveira, A. C.; Homonnay, Z.; Vértes, A.

doi:10.1023/a:1006768628448

Cited by 3 publications

(1 citation statement)

References 3 publications

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“…14 By contrast, although the sedimentation age was different from that of GC1806, similar chemical species were slightly detected in sediments collected from 15 locations in the Gulf of Admiralty at King George Island off the Antarctic Peninsula. 15 The chemical species were also detected in sedimentary rocks from the same location. 16 For glauconite in GC1806, local diagenesis was expected in sediments off the Antarctic Peninsula.…”

Section: Chemical States Of Ironmentioning

confidence: 92%

<sup>57</sup>Fe Mössbauer Study of Specific Iron Species in the Antarctic Ocean Sediments

Shozugawa

Kuno

Matsui

et al. 2009

Journal of Nuclear and Radiochemical Sciences

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Section: Chemical States Of Ironmentioning

confidence: 92%

<sup>57</sup>Fe Mössbauer Study of Specific Iron Species in the Antarctic Ocean Sediments

Shozugawa

Kuno

Matsui

et al. 2009

Journal of Nuclear and Radiochemical Sciences

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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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Antarctica: general aspects and Brazilian research activities

Schuch

Garg²,

Кузманн³

et al. 2001

Env Mgtt and Health

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The continent of Antarctica consists of 14 million km2, roughly equivalent to the whole of South America, and is of immense interest to humanity, in particular to the countries of the Antarctic Treaty. The Antarctic continent is the continent of superlatives: it is almost isolated from the rest of the continents, and is severely cold, windy, and dry. In winter, the Antarctic area increases to nearly 32 million km2, because of formation of a 1,000km wide ice‐belt. The average depth of ice on the continent is in the order of 2,000m, and in the transantarctic region this depth is 4,800 meters. Antarctica is the biggest sweet water reservoir of the planet earth. Icebergs are common and huge ones (190km in length and 130km wide) have also been observed. The minimum temperature recorded (–89.2°C) at Vostok (Russian base) on 21 July 1983 is also the minimum recorded environmental temperature on the planet earth. Because of extreme temperature variations the Antarctic winds have high velocity. The environment is very dry and at the center of the continent the dryness is of the same magnitude as in the driest desert anywhere on the planet. This is the only uninhabited continent of the planet, except for some 50 research bases which cover an insignificant area located on the continent and the Antarctica Peninsula. Because of its economic, strategic, geopolitical, scientific, meteorological, and oceanographic importance and possible exploitation in the future, Antarctica has been attracting greater attention every day. Antarctica is basically concentrated around the South Pole and it touches the Atlantic, Pacific, and Indian Oceans. Brazil, in common with many other nations, has geopolitical interests and in untapped mineral deposits (considerable deposits of coal, petroleum, gas). In the south, where the Atlantic, Pacific and Indian Oceans meet, the cold water of Antarctica is the habitat housing hundreds of species of sea life. Unrestricted and unbalanced exploitation of Antarctica could cause changes in the meteorological and oceanographic balance. In the present paper, the Brazilian Antarctic Program, and summarized results of studies of Antarctic soil, rocks, and sediments are reported.

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Cited by 3 publications

References 3 publications

<sup>57</sup>Fe Mössbauer Study of Specific Iron Species in the Antarctic Ocean Sediments

<sup>57</sup>Fe Mössbauer Study of Specific Iron Species in the Antarctic Ocean Sediments

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

Antarctica: general aspects and Brazilian research activities

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