Differentiation of physical from chemical toxicity in solid waste fish bioassays

摘要: This study showed that particulate (i.e., physical) toxicity was responsible for rainbow trout deaths in bioassays with two separate solid wastes. conclusion based on: (1) fish necropsies which indicated physical damage to gills but no evidence of chemical liver or kidney, (2) analyses levels Priority Pollutants and other target compounds were too low cause the observed toxicity, (3) structural waste particles these consisted inert materials, (4) use centrifugation techniques remove most suspended material bioassay tanks resulting an elimination toxicity. The associated lethal effects approximately 5 10 μm size. Regulatory testing wastes must distinguish since disposal options can vary depending on mode For instance, raises concern regarding leaching through soils into groundwater, whereas if are such is not concern.