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USE OF TOXICITY IDENTIFICATION EVALUATION METHODS TO CHARACTERIZE IDENTIFY, AND CONFIRM HEXAVALENT CHROMIUM TOXICITY IN AN INDUSTRIAL EFFLUENT
Citation:
Mount, D. R. AND J. R. Hockett. USE OF TOXICITY IDENTIFICATION EVALUATION METHODS TO CHARACTERIZE IDENTIFY, AND CONFIRM HEXAVALENT CHROMIUM TOXICITY IN AN INDUSTRIAL EFFLUENT. WATER RESEARCH 34:1379-1385, (2000).
Description:
A toxicity identification evaluation (TIE) was conducted on effluent from a major industrial discharger. Initial monitoring showed slight chronic toxicity to Ceriodaphnia dubia; later sample showed substantial toxicity to C. dubia. Chemical analysis detected hexavalent chromium (Cr[VI]) at concentrations sufficient to account for the observed toxicity. The source of Cr[VI] in the effluent was traced to a malfunctioning heat exchanger, after this malfunction was corrected, neither chronic toxicity nor appreciable Cr[VI] was observed in the effluent again.