HR: 0800h
AN: H51B-0440    [Abstracts]
TI: Polar Organic Compounds in Surface Waters Collected Near Lead-Zinc Mine and Milling Operations in Missouri
AU: * Rostad, C E
EM: cerostad@usgs.gov
AF: US Geological Survey, Branch of Regional Research, Building 95, MS 408 Denver Federal Center, Denver, CO 80225, United States
AU: Schmitt, C J
EM: cjschmitt@usgs.gov
AF: U.S. Geological Survey, Columbia Environmental Research Center, 4200 New Haven Rd., Columbia, MO 65201, United States
AU: Schumacher, J G
EM: jschu@usgs.gov
AF: US Geological Survey Missouri Water Science Center, 1400 Independence Road, Rolla, MO 65401, United States
AU: Leiker, T J
AF: US Geological Survey National Water Quality Laboratory, Building 95, MS 407, Denver Federal Center, Denver, CO 80225, United States
AB: Surface-water samples were collected near a lead mine and mill tailings about 70 miles southwest of St. Louis, Missouri, during the summer of 2006. The purpose of this sampling was to determine if polar organic compounds were present that could be a cause of documented negative impacts to biota downstream. Water samples contained relatively high concentrations of dissolved organic carbon for surface waters (greater than 20 mg/L), but were colorless, which precluded naturally occurring aquatic humic or fulvic acids. Previous analysis indicated that samples were devoid of pesticides and acid/base/neutral extractable semi-volatile organic compounds, such as polycyclic aromatic hydrocarbons. After isolation by three different types of solid phase extraction, samples were analyzed by electrospray ionization/mass spectrometry. Polar organic compounds commonly used in the milling process, such as alkyl xanthates, were not found; however, xanthate degradation products were detected. Most of the polar organic compounds identified contained sulfonate groups, which are characteristic of some of the reagents used in the milling process. Sulfonate compounds may have low sorption onto soil or sediments and be mobile in the aqueous environment.
DE: 1030 Geochemical cycles (0330)
DE: 1055 Organic and biogenic geochemistry
DE: 1803 Anthropogenic effects (4802, 4902)
DE: 1895 Instruments and techniques: monitoring
SC: Hydrology [H]
MN: 2007 Fall Meeting