Journal
CHINESE SCIENCE BULLETIN
Volume 45, Issue 16, Pages 1471-1476Publisher
SCIENCE PRESS
DOI: 10.1007/BF02898890
Keywords
graphite; PCDD/F; chloralkali; contamination
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The graphite electrode sludge was sampled from a huge chloralkali plant in central China. The total level of PCDD/F was found as high as 378.85 mu g/kg sludge (dry weight). The patterns of PCDD/F in each homologue indicated the predominance of tetra- to octa-chlorinated PCDFs, Furthermore, the toxic 2,3,7,8-substituted PCDFs constituted over 80% of the total PCDFs in the sludge and the corresponding PCDDs were only at 15 mu g/kg level. The calculated value of the international toxic equivalence (I-TEQ) in sludge was 21.65 mu g/kg sludge (dry weight). This typical dioxin chloralkali pattern was apparently identified in the sediments near the effluent outlet of the chloralkali plant.
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