Acidic processing of fly ash: chemical characterization, morphology, and immersion freezing

Delanie J. Losey, Sarah K. Sihvonen, Daniel P. Veghte, Esther Chong, Miriam Arak Freedman

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Fly ash can undergo aging in the atmosphere through interactions with sulfuric acid and water. These reactions could result in chemical and physical changes that could affect the cloud condensation or ice nucleation activity of fly ash particles. To explore this process, different water and acid treated fly ash types were characterized with X-ray diffraction (XRD), transmission electron microscopy (TEM), electron dispersive spectroscopy (EDS), selected area diffraction (SAED), and inductively coupled plasma atomic emission spectroscopy (ICP-AES). Then, their immersion freezing activity was assessed. With water and acid treatment, a wide variety of metals were leached, depending on the starting composition of the fly ash. Acid treatment resulted in the formation of gypsum, Ca(SO4)·2H2O, for fly ash containing Ca as well as morphological changes. The immersion freezing activity was also assessed for each fly ash system to compare the effects of water and acid processing. Our results support the assertion that fly ash can serve as a cloud condensation or ice nucleus to affect climate.

Original languageEnglish (US)
Pages (from-to)1581-1592
Number of pages12
JournalEnvironmental Science: Processes and Impacts
Volume20
Issue number11
DOIs
StatePublished - Nov 2018

Fingerprint

Coal Ash
Immersion
Freezing
fly ash
freezing
Processing
Acids
Water
acid
Ice
condensation
Condensation
Atomic emission spectroscopy
atomic emission spectroscopy
ice
Calcium Sulfate
Atomic Spectrophotometry
Water Purification
Inductively coupled plasma
chemical

All Science Journal Classification (ASJC) codes

  • Environmental Chemistry
  • Public Health, Environmental and Occupational Health
  • Management, Monitoring, Policy and Law

Cite this

Losey, Delanie J. ; Sihvonen, Sarah K. ; Veghte, Daniel P. ; Chong, Esther ; Freedman, Miriam Arak. / Acidic processing of fly ash : chemical characterization, morphology, and immersion freezing. In: Environmental Science: Processes and Impacts. 2018 ; Vol. 20, No. 11. pp. 1581-1592.
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Acidic processing of fly ash : chemical characterization, morphology, and immersion freezing. / Losey, Delanie J.; Sihvonen, Sarah K.; Veghte, Daniel P.; Chong, Esther; Freedman, Miriam Arak.

In: Environmental Science: Processes and Impacts, Vol. 20, No. 11, 11.2018, p. 1581-1592.

Research output: Contribution to journalArticle

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