Chemical characteristics of Northeast Asian fly ash particles: Implications for their long-range transportation

Inoue, Jun; Momose, Azusa; Okudaira, Takamoto; Murakami-Kitase, Akiko; Yamazaki, Hideo

doi:10.1016/j.atmosenv.2014.06.048

Cited by 12 publications

(8 citation statements)

References 41 publications

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“…[1,7,8,50] However, most laboratory studies available use fly ash standards, with no distinction between source regions of combustion process. [13,25] The comparative study we present here shows that the atmospheric acidic processing of three different fly ash samples from three different sources, the United States, India and Europe, yields significant variations in iron mobilisation.…”

Section: Discussionmentioning

confidence: 99%

“…[10][11][12][13] Because of its size and morphology, fly ash tends to have long residence times, long-range transport and high atmospheric lifetimes. [7,8,10] Owing to their high iron oxide content, these combustion particles have been suggested as a source of atmospheric aqueous iron. [13,14] In fact, anthropogenic aerosols, including fly ash, have been shown to contribute ,50 % of the iron deposited near industrial regions and at least 5 % over open oceans.…”

Section: Introductionmentioning

confidence: 99%

“…[3][4][5][6] Although efforts have been made to dispose of fly ash and prevent its emission into the atmosphere, field studies performed over the last decade have found fly ash particles in isolated regions, suggesting long-range atmospheric transport. [7][8][9][10] All fly ash particles found in the atmosphere are fine particulate matter (,2.5 mm) released either by direct emission or by fugitive emissions from the handling of fly ash. [10][11][12][13] Because of its size and morphology, fly ash tends to have long residence times, long-range transport and high atmospheric lifetimes.…”

Section: Introductionmentioning

confidence: 99%

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Comparative evaluation of iron leach from different sources of fly ash under atmospherically relevant conditions

et al. 2016

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Environmental context. Iron, a limiting nutrient of plankton in the ocean, is deposited to the sea from atmospheric aerosols. In particular, atmospheric acidic conditions promote dissolution of iron from fly ash, a byproduct of coal-fired power plants. Here, we report that the iron leached from fly ash depends on its source region, and that the type of combustion process may influence the iron species mobilized.Abstract. Fly ash, an iron-containing by-product of coal-fired power plants, has been observed in atmospheric aerosol plumes. Under the acidic atmospheric conditions resulting from the uptake of atmospheric gases, iron leached from fly ash can impact global biogeochemical cycles. However, the fly ash source region, as well as its generating power plant, plays an important role in the amount, speciation and lability of iron. Yet no comparative studies have been made on iron leached from fly ash from different sources. This study reports the iron mobilisation by proton-promoted dissolution from wellcharacterised fly ash samples from three distinctive locations: the USA Midwest, north-east India and Europe. In addition, pH dependency was also investigated. Proton-promoted dissolution showed a variability between source regions with a relative iron leach in the order USA Midwestern . north-east Indian . European ash. In addition, the initial rate of iron leach suggests that source region is indeed a determining factor in the iron leaching capacity of fly ash, because dissolution from Midwestern fly ash is also faster than both European and Indian ash. Finally, the combustion process of fly ash proved to be significant for the iron speciation, given that well-combusted fly ash samples leached mostly Fe 3þ rather than bioavailable Fe 2þ . The role of fly ash should therefore be taken into account in order to better understand the effects of combustion particles in atmospheric iron deposition.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Comparative evaluation of iron leach from different sources of fly ash under atmospherically relevant conditions

et al. 2016

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“…Although no perceptible industrial air pollution point is around the study area, the diffusion of atmospheric fallout from a long distance leads to a mixture of Pb from multiple sources in this area (Gouin et al 2004;Inoue et al 2014). Despite the strong decrease in industrial and vehicle lead emissions at a global scale in recent decades (Glorennec et al 2007), lead-enriched particles are still emitted to the environment, especially by coal combustion (Diaz-Somoano et al 2009).…”

Section: Resultsmentioning

confidence: 99%

New isotopic evidence of lead contamination in wheat grain from atmospheric fallout

Yang

Chen

Lei

et al. 2015

Environ Sci Pollut Res

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Crops could accumulate trace metals by soil-root transfer and foliar uptake from atmospheric fallout, and an accurate assessment of pollution sources is a prerequisite for preventing heavy metal pollution in agricultural products. In this study, we examined Pb isotope rates to trace the sources of Pb in wheat grain grown in suburbs. Results showed that, even in zones with scarcely any air pollution spots, atmospheric fallout was still a considerable source of Pb accumulation in wheat. The concentration of Pb in wheat grain has poor correlation with that in farm soil. The Pb concentration in wheat grains with dust in bran coat was significantly higher than that in wheat grains, which indicates that Pb may accumulate by foliar uptake. The Pb isotope rate has obvious differences between the soil and atmospheric fallout, and scatter ratio is significantly closer between the wheat grain and atmospheric fallout. Atmospheric fallout is a more significant source of Pb concentration in wheat grains than in soil. As far as we know, this is the first study on the main sources of lead in grain crop (wheat) samples with isotope. This study aims to improve our understanding of the translocation of foliar-absorbed metals to nonexposed parts of plants.

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“…Previous studies have shown that oil-fired power plants are prone to emitting S-rich SCPs (Alliksaar et al, 1998;Rose et al, 1996Rose et al, , 1999Murakami-Kitase et al, 2010). In contrast, Inoue et al (2014) showed that in China, SCPs in surface sediments around 2010 were enriched in silicon and titanium, which are considered to have been emitted from coal-fired sources. Therefore, in the current study, S-rich particles in the late 1950s are presumably derived from oil-fired sources with hightemperature combustion, whereas Si-rich and Ti-rich particles throughout this period possibly reflect emission from coal-fired sources.…”

Section: Scp Records Indicating Factors Behind Temporal Variations In...mentioning

confidence: 98%

The record of sedimentary spheroidal carbonaceous particles (SCPs) in Beppu Bay, southern Japan, compared to historical trends of industrial activity and atmospheric pollution: Further evidence for SCPs as a marker for Anthropocene industrialization

Inoue

Takenaka

Okudaira

et al. 2022

The Anthropocene Review

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Spheroidal carbonaceous particles (SCPs) are carbonaceous fly ash particles produced solely from industrial fossil fuel combustion. SCPs in sediments can be an indicator of past industrialization. We examined the sedimentary SCP record in Beppu Bay, southern Japan, and compared this record to historical trends of industrial activity and monitoring data for atmospheric pollutions in the region. Beppu Bay has varved sediments in the absence of bioturbation, providing an ideal situation for SCP study. Our results show that the temporal variation of SCP deposition is consistent with the trends of industrial activity and the temporal variation of status of atmospheric pollution. We conclude that undisturbed sediments such as Beppu Bay sediments have SCP records that adequately represent historical trends of industrial activity and atmospheric pollution in detail. These findings support that SCPs are a potential marker for the Anthropocene, characterized by industrialization.

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Chemical characteristics of Northeast Asian fly ash particles: Implications for their long-range transportation

Cited by 12 publications

References 41 publications

Comparative evaluation of iron leach from different sources of fly ash under atmospherically relevant conditions

Comparative evaluation of iron leach from different sources of fly ash under atmospherically relevant conditions

New isotopic evidence of lead contamination in wheat grain from atmospheric fallout

The record of sedimentary spheroidal carbonaceous particles (SCPs) in Beppu Bay, southern Japan, compared to historical trends of industrial activity and atmospheric pollution: Further evidence for SCPs as a marker for Anthropocene industrialization

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