Poster Number 12
See more from this Division: General Discipline Sessions
See more from this Session: Geochemistry; Geochemistry, Organic (Posters)
Abstract:
Metals, including Fe, As, Cr, Co, Cu, Pb, Mn, Ni, and Zn partition between 3 states: (1) sulfides; (2) adsorption onto ferric precipitates; and (3) dissolved aqueous state. Zones of groundwater discharge toward the surface water reservoirs have strong oxidation gradient, contain oxidative re-precipitation of ferric hydroxides, and adsorptive metals enrichment. Multi-elemental correlations of Fe, As, and Ni, Co, Cu, Zn, Pb, Mn within this zone suggest a similar source mobilization as landfill exogenic substances and simple transport mechanism within the wetland influenced aquifer. Lack of such correlations in the area of known seepage points from a discharging landfill plume is either further modified by sulfide precipitations and/or by additions of dissolved metals originating as landfill endogenic components. Comparison with other landfills outside the Central Massachusetts zone indicate that metals within the landfill substrate are the principal source of mobilized metals in the plumes.
See more from this Division: General Discipline Sessions
See more from this Session: Geochemistry; Geochemistry, Organic (Posters)