Formation of chlorinated dioxins during production of bleached kraft pulp from sawmill chips contaminated with polychlorinated phenols

Journal Article · Mon Mar 01 00:00:00 EST 1993 · Tappi Journal; (United States)

OSTI ID:6350378

Luthe, C E; Berry, R M; Voss, R H ^[1]

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1. Paprican, Pointe Claire, Quebec (Canada)

Until recently, sawmills used polychlorinated phenol (polyCP) formulations to prevent sap-staining of undried lumber. Bleached kraft pulp mills that used chips from polyCP-treated lumber were found to have elevated levels of hexachlorinated dioxins (hexaCDD) in their pulps, effluents, and sludges. This report presents the results of an investigation to elucidate the mechanism of hexaCDD formation during kraft pulping of polyCP-contaminated sawmill chips. The major constituents of the polyCP formulations- tetraCP and pentaCP-play a negligible role in hexaCDD formation. Polychlorinated phenoxyphenol (polyCPP) contaminants in the polyCP formulations are the key contributing factors, with hexaCDD contamination occurring as a consequence of digester-mediated condensation of polyCPP (i.e., predioxin) contaminants.

• OSTI ID: 6350378
• Journal Information: Tappi Journal; (United States), Vol. 76:3; ISSN 0734-1415
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
54 ENVIRONMENTAL SCIENCES
DIOXIN
SYNTHESIS
ORGANIC CHLORINE COMPOUNDS
PAPER INDUSTRY
SLURRIES
PRODUCTION
CHEMICAL REACTION KINETICS
CONTAMINATION
PHENOLS
WOOD WASTES
AROMATICS
DISPERSIONS
HETEROCYCLIC COMPOUNDS
HYDROXY COMPOUNDS
INDUSTRY
KINETICS
MIXTURES
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
REACTION KINETICS
SOLID WASTES
SUSPENSIONS
WASTES
WOOD PRODUCTS INDUSTRY
320305* - Energy Conservation
Consumption
& Utilization- Industrial & Agricultural Processes- Industrial Waste Management
540220 - Environment
Terrestrial- Chemicals Monitoring & Transport- (1990-)