A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Stabilization of Inorganic Contaminants in Lead Crystal Polishing Sludge
Neutralization sludge from the lead crystal polishing process has a high leaching potential for a series of inorganic contaminants. Cost-effective treatment options would be desirable both for soil contaminated by this residue and for waste from current manufacturing. The feasibility of contaminant stabilization was studied in batch experiments using five phosphatic amendments. All additives reduced lead concentrations relative to the control presumably by formation of sparingly soluble lead phosphates. Arsenic and zinc concentrations were above the control in some treatments due to either competitive displacement or additive-borne secondary contamination. Both stabilization and mobilization were dose-dependent. Equilibration velocities were contaminant-specific and varied between treatments. Slowest kinetics and lowest stabilization efficiencies were observed for fluoride. Treatment optimization should therefore focus on combined amendments which address both lead and fluoride.
Stabilization of Inorganic Contaminants in Lead Crystal Polishing Sludge
Neutralization sludge from the lead crystal polishing process has a high leaching potential for a series of inorganic contaminants. Cost-effective treatment options would be desirable both for soil contaminated by this residue and for waste from current manufacturing. The feasibility of contaminant stabilization was studied in batch experiments using five phosphatic amendments. All additives reduced lead concentrations relative to the control presumably by formation of sparingly soluble lead phosphates. Arsenic and zinc concentrations were above the control in some treatments due to either competitive displacement or additive-borne secondary contamination. Both stabilization and mobilization were dose-dependent. Equilibration velocities were contaminant-specific and varied between treatments. Slowest kinetics and lowest stabilization efficiencies were observed for fluoride. Treatment optimization should therefore focus on combined amendments which address both lead and fluoride.
Stabilization of Inorganic Contaminants in Lead Crystal Polishing Sludge
Weigand, Harald (author) / Gretzbach, Tina (author) / Bäumler, Rupert (author) / Marb, Clemens (author)
GeoCongress 2008 ; 2008 ; New Orleans, Louisiana, United States
GeoCongress 2008 ; 708-715
2008-03-07
Conference paper
Electronic Resource
English
Stabilization of Inorganic Contaminants in Lead Crystal Polishing Sludge
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