ENSC 201 Lecture Notes - Lecture 1: Arsenic Poisoning, Rodenticide, Bioavailability

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ENSC 201 Week 1 Lecture 1
Lecture 1: Introduction
Chemical Risk
Exposure
no exposure, no risk
Receptor
Individual Humans
Cities & Communities
Animals, Fish
Benthic Organisms
Ecosystems
Hazard
Nature of Contaminant
Concentration of potential toxin
Toxicity
Bioavailability
Environmental compartment (soil, water, etc.)
Environmental Mobility (from one compartment to another)
Hazard
the ability of a chemical to produce toxicity (harm, adverse response)
Risk
the probability that the hazard will occur under defined conditions
Risk Assessment, Risk Communication, Risk Management
Example of Chemical Risk: Arsenic near Yellowknife
hazard
omining and processing of gold produced arsenic trioxide (known to be
highly toxic, sold off as rat poison)
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