innovating for success: selenium...
TRANSCRIPT
May 19, 2015
Innovating for Success: Selenium Management
Agenda
1 Selenium
3 Phase II: Selenium Mass-Balance Model
4 Research and Innovation at Stantec
2 Phase I: Volatilization
Selenium1
Selenium Biogeochemistry
Modified from Herbel et al. 2002
Examples of Selenium
Volatilization
• 17-61% loss of Se from the surface
water in constructed wetlands
attributed to volatilization
• 1455 kg Se/year lost from Great Salt
Lake via volatilization
Ye et al., 2003; Lin and Terry, 2003, Hansen et al. 1998; Johnson et al. 2009, Diaz et al. 2009)
Phase I: Volatilization2
The Power of Volatilization
• Dissolved volatile
Se: 3.7 ng/L
• Translates to 16 to
25% of the
maximum yearly
Se load removed
via volatilization
Dicaltado et al. 2000, Diaz et al. 2009
The Cryo-Trap: Capturing
Selenium
Modified Diaz et al. 2009
Translating
Volatile
Selenium Flux• Annual loss of Se
(kg/year) from the system
• Seasonality of Se volatilization
Phase II: Selenium Mass
Balance
3
Selenium Mass Balance Model
Modified Diaz et al. 2009
Selenium
Input
Selenium
Output
Integrating
Wetlands
Maximizingselenium removal
while protecting
the environment
Research and Innovation
at Stantec4
• Selenium toxicology:
amphibians
• Cost-effective selenium
treatment plants in a
variety of environments
• Arsenic speciation
• Otolith laser ablation
• Laser induced breakdown
spectroscopy
• DNA barcoding
• Non-lethal gene
expression analysis
Missiyh!