DOI: 10.1016/j.atmosenv.2019.117193
论文题名: Determination of calcium and sulfate species in aerosols associated with the conversion of its species through reaction processes in the atmosphere and its influence on cloud condensation nuclei activation
作者: Miyamoto C. ; Sakata K. ; Yamakawa Y. ; Takahashi Y.
刊名: Atmospheric Environment
ISSN: 1352-2310
出版年: 2020
卷: 223 语种: 英语
英文关键词: Absorption spectra
; Aerosols
; Calcite
; Calcium
; Calcium carbonate
; Calcium chloride
; Condensation
; Dust
; Nitrogen compounds
; Particle size analysis
; Superconducting materials
; X ray absorption
; X ray absorption near edge structure spectroscopy
; Cloud condensation nuclei
; Mineral particles
; Reaction
; Sulfate
; X-ray absorption near-edge structure
; Sulfur compounds
; ammonium sulfate
; calcium
; calcium carbonate
; calcium chloride
; calcium oxalate
; calcium sulfate
; mineral
; nitrate
; sulfate
; sulfur
; aerosol
; aerosol composition
; ammonium sulfate
; calcite
; calcium
; chemical alteration
; chloride
; cloud condensation nucleus
; hygroscopicity
; seasonal variation
; speciation (chemistry)
; XANES spectroscopy
; atmosphere
; autumn
; chemical reaction
; cloud condensation nuclei
; Japan
; mineral dust
; particle size
; particulate matter
; priority journal
; seasonal variation
; spring
; summer
; wettability
; winter
; X ray absorption near edge structure spectroscopy
; Chugoku
; Hiroshima [Chugoku]
; Honshu
; Japan
学科: Calcium
; Cloud condensation nuclei (CCN)
; Mineral particles
; Reaction
; Sulfate
; X-ray absorption near-edge structure (XANES)
中文摘要: Calcium (Ca) species in aerosols collected in Higashi–Hiroshima in southwestern Japan were determined by X-ray absorption near-edge structure (XANES) analysis, and their size distributions and seasonal variation were investigated. Calcium K-edge XANES results showed that gypsum (CaSO4⋅2H2O) and calcium oxalate (CaC2O4⋅2H2O) were the major Ca species that were formed by reactions of mineral particles in the atmosphere. These species exhibit similar hygroscopicity to that of calcite (CaCO3), which is an original Ca species in mineral particles. In addition, high hygroscopic Ca species, such as calcium nitrate [Ca(NO3)2⋅4H2O] and calcium chloride (CaCl2⋅2H2O) were considered minor Ca species. Moreover, the formation of CaSO4⋅2H2O by the reaction of mineral particles suppresses the formation of hygroscopic sulfate aerosol species, such as ammonium sulfate [(NH4)2SO4], reducing the number of cloud condensation nuclei (CCN). Sulfur K-edge XANES also confirmed that CaSO4⋅2H2O was a major species of sulfate in coarse particles. By contrast, high hygroscopic sulfate, such as (NH4)2SO4, was major species in fine particle. In addition, CaSO4⋅2H2O fraction to total sulfate increased during the sampling period, which was affected by a dust event. Consequently, the amount of hygroscopic sulfate in fine particles was decreased by the reaction, forming CaSO4⋅2H2O in coarse particles in the presence of mineral dust. Although these facts have been indicated mostly by modeling and laboratory studies, the present research suggested that the reaction of CaCO3 to form CaSO4⋅2H2O will reduce the amount of hygroscopic sulfate aerosols based on natural sample measurement in terms of the speciation of Ca and sulfate in aerosols using XANES spectroscopy. © 2019 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/160591
Appears in Collections: 气候变化与战略
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作者单位: Graduate School of Science, The University of Tokyo, 7-1-3, Hongo, Bunkyo-ku113-0033, Japan; Center for Global Environmental Research, National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, 305-8506, Japan
Recommended Citation:
Miyamoto C.,Sakata K.,Yamakawa Y.,et al. Determination of calcium and sulfate species in aerosols associated with the conversion of its species through reaction processes in the atmosphere and its influence on cloud condensation nuclei activation[J]. Atmospheric Environment,2020-01-01,223