Screening of illicit toxic substances discharged in chemical toilet sludge

摘要

This article presents an integrative approach, using toxicologicaland chemical analyses, to screen for toxic substances that could beillegally added to the chemical-toilet sludge received at thewastewater treatment of the Mon- treal urban community. Four toxicitytests(Microtox, bacteria-respiration, root-elongation, andseed-germination tests)were used to establish the toxicity range of a"normal" sludge and the determination of threshold limits criteria.Chemical-toilet sludge samples were spiked with two types and amountsof con- Taminants(zinc, phenol).