Determination of common anions in wet precipitation from southeastern Michigan by capillary electrophoresis

Y. Deng*, D. Hatahet, K. Douglas, Matthew D Krzyaniak

*Corresponding author for this work

Research output: Contribution to journalConference article

Abstract

Snow and rainwater samples were collected in southeastern Michigan from January to June of 2004. Common inorganic and organic anions (chloride, sulfate, nitrate, formate, oxalate) were determined using capillary electrophoresis. About 66% of the samples exhibited a pH value < 5.6, which is natural acidity of uncontaminated wet precipitation due to the presence of CO2 in the atmosphere. Chloride, sulfate, and nitrate were major chemical species found in the samples. The high levels of chloride in the winter samples were likely due to the salts (NaCl and MgCl2) spread on roadways and sidewalks to reduce the build up of ice during the winter season. Both sulfate and nitrate might primarily come from local anthropogenic activities, e.g., burning fossil fuels and automobile emission. The high levels of hydrogen ions in the samples might be correlated to the relatively high concentrations of sulfate and nitrate that are likely formed from anthropogenic emission of SO2 and NOx in the region. This is an abstract of a paper presented at the 229th ACS National Meeting (San Diego, CA 3/13-17/2005).

Original languageEnglish (US)
Pages (from-to)223-225
Number of pages3
JournalACS, Division of Environmental Chemistry - Preprints of Extended Abstracts
Volume45
Issue number1
StatePublished - Dec 1 2005
EventACS, Division of Environmental Chemistry - Preprints of Extended Abstracts - San Diego, CA, United States
Duration: Mar 13 2005Mar 17 2005

ASJC Scopus subject areas

  • Energy(all)

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