CE 3231 - Introduction to Environmental Engineering and Science Readings for This Class: 5.1-5.9 O hio N orthern U niversity Introduction Chemistry, Microbiology.

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Presentation transcript:

CE Introduction to Environmental Engineering and Science Readings for This Class: O hio N orthern U niversity Introduction Chemistry, Microbiology & Material Balance Water & Air Pollution Env Risk Management Water Quality and Nutrient Cycling This lecture reviews common contaminants that impact water quality and gives information regarding natural cycling of nutrients. When a natural cycle is disrupted, pollution occurs.

Lecture 23 Water Quality & Carbon and Nutrient Cycles (Water Quality III)

Bicarbonate System

Measures of Water Quality Dissolved Oxygen (DO) and Oxygen Demand (OD) Total Dissolved Solids (TDS) Nutrients Metals Pathogens Organic compounds – Total organic compounds (TOC)

Water Pollutant Sources Point Sources - Non-point Sources -

Common Water Pollutants of Concern Oxygen Demanding Material Source:

Common Water Pollutants of Concern Excess nutrients – Nitrogen and phosphorus compounds – sources: – effect:

Common Water Pollutants of Concern Pathogens – Source: – Effect:

Common Water Pollutants of Concern Suspended Solids (SS) – Sources: Salts – Sources:

Common Water Pollutants of Concern Toxic metals and organic compounds Heat

Energy and Mass Flows Development impacts assimilation capacity and food webs

Energy and Mass Flows When assimilation capacity and food webs get out of whack, water quality is impacted.

Carbon Cycling

Nitrogen Cycling

Phosphorous Cycling

Oligotrophic

Mesotrophic

Eutrophic