MERCURY RELEASE FROM DISTURBED ANOXIC SOILS

Solc, Jaroslav ; Bolles, Bethany A.

National Energy Technology Laboratory (U.S.)

关键词: Methylation;    Sediments;    Evaporation;    Excavation;    Drying;   

DOI  :  10.2172/786847
RP-ID  :  FC26-98FT40320--20
RP-ID  :  FC26-98FT40320
RP-ID  :  786847

美国|英语

来源: UNT Digital Library

【 摘 要 】

The primary objectives of experiments conducted at the Energy & Environmental Research Center (EERC) were to provide information on the secondary release of mercury from contaminated anoxic sediments to an aqueous environment after disturbance/change of in situ physical conditions and to evaluate its migration and partitioning under controlled conditions, including implications of these processes for treatment of contaminated soils. Experimental work included (1) characterization of the mercury-contaminated sediment; (2) field bench-scale dredging simulation; (3) laboratory column study to evaluate a longer-term response to sediment disturbance; (4) mercury volatilization from sediment during controlled drying; (5) resaturation experiments to evaluate the potential for secondary release of residual mercury after disturbance, transport, drying, and resaturation, which simulate a typical scenario during soil excavation and transport to waste disposal facilities; and (6) mercury speciation and potential for methylation during column incubation experiments.