The Toxicity Identification of Inorganic Toxicants in Real World Samples
Abstract :The toxicity of a sediment pore water and an effluent was characterized using Toxicity Identification Evaluation (TIE) procedures. Both samples exhibited acute toxicity to the freshwater crustaceanThamnocephalus platyurus. The TIE approach was conducted using an enlarged battery of fractionation tests. Toxicity of the pore water sample was removed or reduced significantly by the cation exchange procedure and the air-stripping test at pH 11. Additionally, reduced toxicity was found at a reduced pH. Based on this TIE study and chemical analysis, ammonia was identified as the main toxic agent. Toxicity of the effluent sample was reduced significantly by the anion exchange resin. Additionally, an increased toxicity was found at a decreased pH. It was concluded from this TIE study and chemical analysis of the effluent that metal chromium was the causative toxicant.