Mobilization of several heavy metals (Cd, Co, Cr, Cu, Pb, and Zn) from the Desloge tailings pile of southeastern Missouri by sanitary landfill leachate

Conference · Fri Apr 01 04:00:00 EST 1994 · Geological Society of America, Abstracts with Programs; (United States)

OSTI ID:6924592

Dixon, T W ^[1]

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1. Kansas State Univ., Manhattan, KS (United States). Dept. of Geology

In 1972, the St. Francois Environmental Corporation constructed a sanitary landfill within the 500-acre Desloge tailing pile of St. Francois County, located in the Old Lead Belt of southeastern Missouri. Refuse was deposited in the landfill from 1972--1993. The tailing pile is dolomite containing residual concentrations of various heavy metals, including cadmium, cobalt, chromium, copper, lead, and zinc. Batch experiments were conducted under oxygenated and oxygen-poor conditions at time increments of 12, 48 and 120 hours to determine the potential mobilization of heavy metals (Cd, Co, Cr, Cu, Pb, and Zn) from the mine tailings by sanitary landfill leachate. Results indicate leachate concentrations of Co, Cu, Pb, and Zn in solution increased through time; increases for Co-ranged from 335% to 828%, for Cu-from 400% to 971%, for Pb-from 22% to 505%, and for Zn-from 327% to 638%. Leachate concentrations of Ca and Fe decreased through time; decreases for Ca-ranged from 51% to 68%, and for Fe-from 90% to 95%. Metal concentrations of Cd and Cr were below analytical detection limits in all leachate samples. The pH of the landfill leachate increased from 7.4 to 8.0 after interacting with the mine tailings. Results did not indicate any trends due to different oxygen conditions. Equilibrium was not attained. Details from this investigation can be integrated with groundwater data from St. Francois County to determine if the landfill is mobilizing and transporting significant concentrations of heavy metals into the drinking water aquifer system underlying the Desloge tailings pile.

• OSTI ID: 6924592
• Report Number(s): CONF-9404217--
• Conference Information: Journal Name: Geological Society of America, Abstracts with Programs; (United States) Journal Volume: 26:5
• Country of Publication: United States
• Language: English

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54 ENVIRONMENTAL SCIENCES
540220 -- Environment
Terrestrial-- Chemicals Monitoring & Transport-- (1990-)
58 GEOSCIENCES
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CHEMICAL ANALYSIS
DEVELOPED COUNTRIES
DISPERSIONS
DISSOLUTION
GROUND WATER
HYDROGEN COMPOUNDS
LEACHATES
LEACHING
MANAGEMENT
MINERAL WASTES
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MIXTURES
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OXYGEN COMPOUNDS
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SANITARY LANDFILLS
SEPARATION PROCESSES
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WASTE DISPOSAL
WASTE MANAGEMENT
WASTES
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WATER POLLUTION