changing environment urban contaminants of concern ◦ heavy metals ◦ polycyclic aromatic...

7
The Use of Natural Drainage Systems for Pollutant Collection and Remediation in Urban Areas

Upload: deirdre-washington

Post on 05-Jan-2016

230 views

Category:

Documents


4 download

TRANSCRIPT

Page 1: Changing Environment  Urban Contaminants of Concern ◦ Heavy Metals ◦ Polycyclic Aromatic Hydrocarbons (PAHs)  In Situ Remediation ◦ Mechanisms ◦ Influencing

The Use of Natural Drainage Systems for Pollutant

Collection and Remediation in Urban Areas

Page 2: Changing Environment  Urban Contaminants of Concern ◦ Heavy Metals ◦ Polycyclic Aromatic Hydrocarbons (PAHs)  In Situ Remediation ◦ Mechanisms ◦ Influencing

Changing Environment

Urban Contaminants of Concern◦ Heavy Metals◦ Polycyclic Aromatic Hydrocarbons (PAHs)

In Situ Remediation◦ Mechanisms ◦ Influencing Factors

Conclusions

Overview

Page 3: Changing Environment  Urban Contaminants of Concern ◦ Heavy Metals ◦ Polycyclic Aromatic Hydrocarbons (PAHs)  In Situ Remediation ◦ Mechanisms ◦ Influencing

Increasing urban/suburban development

◦ Transportation

◦ Impermeable area

◦ Water management

◦ Soil contamination

Changing Environment

Page 4: Changing Environment  Urban Contaminants of Concern ◦ Heavy Metals ◦ Polycyclic Aromatic Hydrocarbons (PAHs)  In Situ Remediation ◦ Mechanisms ◦ Influencing

Heavy Metals

◦ Pb, Mn, Cu, Zn◦ Sources

Polycyclic Aromatic Hydrocarbons

◦ High/Low molecular weight◦ Sources

Urban Contaminants of Concern

Page 5: Changing Environment  Urban Contaminants of Concern ◦ Heavy Metals ◦ Polycyclic Aromatic Hydrocarbons (PAHs)  In Situ Remediation ◦ Mechanisms ◦ Influencing

PAH Mechanisms

◦ Rhizospheric Biodegradation

◦ Phytodegradation

◦ Phytoaccumulation

◦ Phytostabilization

Heavy Metal Mechanisms

◦ Phytoaccumulation

In Situ Remediation

Page 6: Changing Environment  Urban Contaminants of Concern ◦ Heavy Metals ◦ Polycyclic Aromatic Hydrocarbons (PAHs)  In Situ Remediation ◦ Mechanisms ◦ Influencing

Retention Time◦ Soil profile◦ Plant selection

Climatic Considerations◦ Plant selection◦ Loading rate

Long Term Effects

Factors Influencing Performance of Natural Drainage Systems

Page 7: Changing Environment  Urban Contaminants of Concern ◦ Heavy Metals ◦ Polycyclic Aromatic Hydrocarbons (PAHs)  In Situ Remediation ◦ Mechanisms ◦ Influencing

Sustainable Infrastructure Need for Long Term Studies

Conclusion