Effects of Irradiation and Freezing on Toxicity of Sewage Sludge Elutriate Samples

摘要

The Microtox assay (Vibrio fischeri) was used to determine if the handling of environmental or industrial samples affects their toxicity Irradiation and 3-month freezing of sewage sludge elutriates decreased the toxicity of these samples as measured using the Microtox test The effect of storage at -20℃ was also con- firmed with the lettuce Lactuca sativa root elongation assay Statistical inde- pendence (P >0.05) between each handling and previous sludge treatment was observed. however, which indicated the possibility of comparing toxicity data obtained from different samples handled consistently