Stabilization of high mercury contaminated brine purification sludge.
The highly leachable mercury contaminants of brine purification sludge (BPS) generated from the Hg-cell electrolysis process in chlorine production can be stabilized in the treatment procedure employing ferric-lignin derivatives (FLD) (Ligmet binder) and Portland cement (PC). The stabilization effectiveness has been examined by time-based multiple toxicity characteristic leaching procedure (TCLP) tests and sequential TCLP tests. In a period of 50 days, the multiple TCLP tests showed a variation of less than 90 microg l(-1) for the leachable mercury level, and the sequential TCLP tests for the same sample displayed a declining TCLP mercury level. Based on this study, the stabilization of approximately 2000 t of brine purification sludge has been successfully processed with the ferric-lignin derivatives treatment.
Zhuang
J Ming
JM
NORAM Engineering and Constructors Ltd., 200 Granville Street, Vancouver, BC, Canada V6C 1S4. mzhung@noram-eng.com
Lo
Tony
T
Walsh
Tony
T
Lam
Tak
T
D007220:Industrial Waste / Q000517:prevention & control; D008628:Mercury / Q000737:chemistry*; D012037:Refuse Disposal / Q000379:methods*; D012492:Salts / Q000737:chemistry*; D012722:Sewage / Q000737:chemistry*
D007220:Industrial Waste; D012492:Salts; D012722:Sewage; C017082:brine; D008628:Mercury