Safety value of contaminant in water pollution accident based on human health risk

The acute human health risk assessment of contaminant in water pollution accident is a new study field of environmental sciences.This study established a model for calculating acute safety value of contaminant in water pollutant.The acute safety value of contaminant in mainly water pollution during 2000-2010 was calculated by this model.The safety value of sodium cyanide,cadmium,formaldehyde,ammonia,toluene,nitrobenzene,microcystin-LR were 0.1,0.6,8,20,6,0.07,0.004 mg ·L-1,respectively.The differences of safety value calculate methods between acute and chronic exposure were compared from the following aspects,the toxicology exposure end-point,allocation of intake,exposure sensitive subpopulation.