Tetrachloro- o -benzoquinone as a Component in Bleached Kraft Chlorination Effluent Toxic to Young Salmon

• Published in: Journal of the Fisheries Research Board of Canada
• Main Authors: Das, B. S., Reid, S. G., Betts, J. L., Patrick, K.
• Format: Article in Journal/Newspaper
• Language: English
• Published: Canadian Science Publishing 1969
• Subjects: General Medicine; Atlantic salmon; Salmo salar
• Online Access: http://dx.doi.org/10.1139/f69-288; http://www.nrcresearchpress.com/doi/pdf/10.1139/f69-288

Evidence is given that tetrachloro-o-benzoquinone is involved in the toxicity of bleached kraft chlorination effluent (BKCE) to young Atlantic salmon, Salmo salar. The main experimental support was isolation of tetrachlorocatechol from whole BKCE and from a BKCE fraction toxic to salmon, after reduction of both with sodium borohydride. Tetrachloro-o-benzoquinone was shown to be toxic to salmon at low concentrations. Instability of the toxic component in BKCE and substantial loss of toxicity upon treatment of BKCE with sulfur dioxide agreed with the properties of tetrachloro-o-benzoquinone in water solution.