Classification of Inorganic Small Spherical Particles in Rime and Snow at the Summit of Mt. Kajigamori, Shikoku Island, Japan

Kurumi, Yuhya; Sanagawa, Yosuke; Yamamoto, Yuhei; Kamimura, Takeshi; Imai, Shoji

doi:10.2116/bunsekikagaku.63.837

Cited by 2 publications

(3 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The Fe, Cr, and Ni contents were measured as below the LODs for the rime samples; this is supported by SEM observations from our previous reports. 18,19 To suppress the effect of meteorological factors, both rime and snow were allowed to accumulate in the late-night/early hours of a day and were collected early in the morning.…”

Section: Samplingmentioning

confidence: 99%

“…Shi et al 15 reported that the levels of carbonaceous materials and mineral particles were comparable in aerosols from urban areas, suburban areas and the clean air district in Beijing, but that coal fly ash was higher in the clean air district. Recently, Imai et al [16][17][18][19] classified the ISPs included in insoluble rime, hard rime, and snow into five categories, with their chemical components corresponding to their area of generation: AREA-A, Huabei-type; AREA-B, Dongbei-type; AREA-B2, Korean peninsula-type; AREA-C, Heilongjiang-Russia-type, and AREA-D, Japan-type. When the winter monsoon is predominant, the S(-II) compounds were transported from northeast China together with various components of coal combustion exhaust from similar areas of ISP generation.…”

Section: Introductionmentioning

confidence: 99%

“…The aim of this work is to use WDXRF to provide a methodology for the sulfur speciation of airborne particles, including the origin and/or fractions of S(VI) and S(-II), determined from the combination of (i) the ratio of the elemental components of the filtrates and (ii) the chemical shift of the S-Kα line. [17][18][19][20] The application of this methodology is interesting in terms of its applicability to other elements.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Sulfur Chemical State and Chemical Composition of Insoluble Substance in Soft Rime, Hard Rime, and Snow Collected in Remote and Rural Areas in Japan Using Wavelength-dispersive X-ray Fluorescence

Imai

Yamamoto

et al. 2018

ANAL. SCI.

Self Cite

View full text Add to dashboard Cite

Using a commercially available wavelength-dispersive X-ray fluorescence (WDXRF) spectrometer, the chemical composition and S-Kα spectrum of rime and snow samples collected in remote and rural areas of Japan were measured with a membrane filter sample technique to investigate the long-range transport of aerosol from the East Asian continent. Insoluble substances are derived into three categories: 1) conventional mineral origin (crustal substance), 2) urban dust origin (Fe-Zn-Ca) and 3) coal origin (S-As). Assuming that (i) S(VI) was found as a plaster-like substance in hard rime, depending on [Ca], and that (ii) S(-II) was found as non-crustal sulfur compounds, fractions of S(VI) and S(-II) in rime could be calculated as 35 ± 6 and 66 ± 7% by [Ca], which is in agreement with 32 ± 8 and 68 ± 8%, respectively, by the chemical shift of the S-Kα line. During a one-day meteorological event that included the accumulation of both rime and snow, differences to the snow-like content corresponded to characteristics typical of rime since the chemical compositions of rime also includes the composition of the snow. The fractions of 22 ± 12% of S(VI) and 76 ± 12% of S(-II), respectively, were found in rime. The fraction of S(-II) decreased from the Chugoku district towards the Shikoku district. Along the coast of the Japan Sea, the fraction of S(-II) decreased from Chugoku district toward the Northeast Japan. It can be proposed that other analytical techniques of S, Al, and Ca in that are favorable to this fractionation.

show abstract

Section: Samplingmentioning

confidence: 99%