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Assessment of Solid and Wastewater Leachate Impacts in Rural Alaska

This study focuses on the assessment of leachate from solid waste and wastewater sites in rural Alaska. By conducting soil and water sampling around dump and wastewater areas, the research aims to analyze inorganic (metals) and organic contaminants (such as phthalates, biphenyl, and PAHs), along with microbial indicators (E. coli, Enterococcus). The primary objective is to identify stressors that pose significant risks to public health and the environment, contributing to better management and mitigation strategies in these vulnerable regions.

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Assessment of Solid and Wastewater Leachate Impacts in Rural Alaska

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  1. Assessment of Rural Alaskan Solid and Wastewater LeachateEdda Mutter University of Alaska FairbanksWater and Environmental Research Centereamutter@alaska.edu

  2. Research Outline Soil and Water Sampling in around Dump and Wastewater sites Inorganic (Metals) and Organic (Phthalates, Biphenyl, Alkyl phenols, Polycyclic Aromatic Hydrocarbons Pharmaceuticals, Microbial & Chemical Constituent Analysis Pathogen Indicator Organisms (E.coli, Enterococcus) Identify the key stressors, which poses the greatest threats to public health and environment

  3. Site Locations Picture: EPA Rare Project

  4. Microbial and Chemical Methods Microbial Indicator Analysis Chemical Analysis Metals: Cation samples were filtered (0.45 mm), acidified with HNO3 , andanalyzed via ICP-MS. Anion samples were analyzed via IC. Organic Compounds – method development are in progress for PAH’s, phthalates, biphenyl, alkylphenols, and pharmaceuticals using HPLC-MSMS. • IDEXX equipment available at the WERC (i.e., Colilert® for E. coli, and Total Coliform; and Enterolert® for Enterococcus)

  5. AlkylphenolEthoxylate (APnEO) • APnEObiodegraded into short-chain APnEO and alkylphenols, such as nonylphenolethoxylates, octylphenol, and nonylphenol. Figure: Renner et al. 1997

  6. Source of NPnEO & NP • Commercial and industrial applied (260 million pounds of NP used in the U.S. 2002) • Laundry detergents • Shampoos • Cosmetics • Household Cleaners • Latex Paints • Pesticides

  7. Preliminary Microbial Results

  8. Preliminary Metal Results

  9. Future Steps • Completing of method development (extraction and instrumentation) to identify the major organic waste constituent. • Pharmaceutical trace study to identify microbial pathogens sources in and around the waste sites.

  10. Acknowledgement • Funding Agencies: EPA RARE, Alaska EPSCoR, NIWR USGS • Drs. William Schnabel (UAF), Dave Barnes (UAF), Birgit Hagedorn, John Kennish, KhrysDuddleston (UAA) • UAA ASET team (Shareen Ali, Rebekah Tee, Candice Ede, and Ben Applegate) • EPA RARE team (Michelle Davis, Ted Jacobson, Lorraine King, Edna Beebe, Clayton Tackett, and Eric Morris).

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