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Speciation of Arsenic, Selenium, and Chromium in Wildfire Impacted Soils and Ashes
In 2007-09, California experienced several large wildfires that damaged large areas of forest and destroyed many homes and buildings. The U.S. Geological Survey collected samples from the Harris, Witch, Grass Valley, Ammo, Santiago, Canyon, Jesusita, and Station fires for testing to identify any possible characteristics of the ashes and soils from burned areas that may be of concern for their impact on water quality, human health, and endangered species. The samples were subjected to analysis for bulk chemical composition for 44 elements by inductively coupled plasma mass spectrometry (ICP-MS) after acid digestion and de-ionized water leach tests for pH, alkalinity, conductivity, and anions. Water leach tests generated solutions ranging from pH 10-12, suggesting that ashes can generate caustic alkalinity in contact with rainwater or body fluids (for example, sweat and fluids in the respiratory tract). Samples from burned residential areas in the 2007 fires had elevated levels for several metals, including: As, Pb, Sb, Cu, Zn, and Cr.
Speciation of Arsenic, Selenium, and Chromium in Wildfire Impacted Soils and Ashes
In 2007-09, California experienced several large wildfires that damaged large areas of forest and destroyed many homes and buildings. The U.S. Geological Survey collected samples from the Harris, Witch, Grass Valley, Ammo, Santiago, Canyon, Jesusita, and Station fires for testing to identify any possible characteristics of the ashes and soils from burned areas that may be of concern for their impact on water quality, human health, and endangered species. The samples were subjected to analysis for bulk chemical composition for 44 elements by inductively coupled plasma mass spectrometry (ICP-MS) after acid digestion and de-ionized water leach tests for pH, alkalinity, conductivity, and anions. Water leach tests generated solutions ranging from pH 10-12, suggesting that ashes can generate caustic alkalinity in contact with rainwater or body fluids (for example, sweat and fluids in the respiratory tract). Samples from burned residential areas in the 2007 fires had elevated levels for several metals, including: As, Pb, Sb, Cu, Zn, and Cr.
Speciation of Arsenic, Selenium, and Chromium in Wildfire Impacted Soils and Ashes
R. E. Wolf (author) / T. M. Hoefen (author) / P. L. Hageman (author) / S. A. Morman (author) / G. S. Plumlee (author)
2010
31 pages
Report
No indication
English
Forestry , Ecology , Environmental Pollution & Control , Analytical Chemistry , Arsenic , Selenium , Chromium , Wildfire , Soils , Ashes , Forests , California , Burned areas , Water quality , Human health , Endangered species , Chemical composition , Mass spectrometers , Sampling , Environmental exposure , Gases , Particulates , Dusts , Watersheds , Leachates , Alkalinity , Anions
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