[Identification of key toxicants in a bleaching effluent--a case study].
The toxicity identification evaluation (TIE) was conducted with a toxic bleaching effluent to identify its toxic components. Toxicity characterisation procedures (phase I) indicated that the primary toxicants in the effluent were volatile, and could be reduced by sodium thiosulfate. Toxicity-based fractionation techniques (phase II) were conducted, and the oxidation organic chloridates were found not to be the major toxicants. Deletion approach of phase III confirmed that the toxicity decreased with the decrease of free and total residual chlorine concentrations, indicating that Cl2, HClO and ClO- were identified as primary toxicants in the effluent.
Yu
H
H
School of the Environment, State Key Laboratory of Pollution Control and Resource Reuse, Nanjing University, Nanjing 210093.
Cheng
J
J
Jin
H
H
D002713:Chlorine / Q000032:analysis / Q000302:isolation & purification*; D006997:Hypochlorous Acid / Q000032:analysis / Q000302:isolation & purification*; D007220:Industrial Waste / Q000032:analysis*; D014865:Waste Disposal, Fluid
D007220:Industrial Waste; D002713:Chlorine; D006997:Hypochlorous Acid