EGGG 167

CEE Lecture 2

Environmental Engineering and

Risk Analysis

EPA Regions

Environmental Engineering

Water Quality

Water and Wastewater Treatment

Solid and Hazardous Waste Management

Air Quality

Environmental Chemistry and Toxicology

Environmental Law

ExposureAtmosfericDeposition

Erosion& Runoff

Untreated discharges

Predicted ExposureConcentration

(PEC)

Effects

Predicted No Effect Concentration (PNEC)

WWTP

P. Van Sprang - Ni-BLM workshop, Ghent, 13-10-2004

Lab- and field studies(ecotoxicity tests)

Aquatic Risk Assessment

Effects: Laboratory Toxicity Tests

algae invertebrates fish

crustacean insect

• Aquatic ecosystem

• Sediment ecosystem

Predicted No Effect Concentration (PNEC)

Safe environmental concentration

P. Van Sprang - Ni-BLM workshop, Ghent, 13-10-2004

Environmental Science and Technology

Di Toro, D. M., Mahony, J. D., Hansen, D. J., Scott, K. J., Carlson, A. R., & Ankley, G. T. (1992). Acid volatile sulfide predicts the acute toxicity of cadmium and nickel in sediments. Environ. Sci. Tech., 26(1), 96-101.

Sediment Dredging

Sediment Capping

Potomac Estuary Algal Bloom