remediating pollution with photocatalytic pavements · the use of titanium dioxide (tio 2) as a...
TRANSCRIPT
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Remediating Pollution
with
Photocatalytic Pavements
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Air Pollution: Natural Causes
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Air Pollution: Man-Made Causes
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The Back Story on Air Pollution
• Over 90% of transportation fuel is petroleumbased.
• 50% of fuel combustion emissions are NitrogenOxides (NOx).
• NOx is the primary cause of visual air pollutionand acid rain.
Source: EPA
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Understanding Nitrogen Oxides
NOx includes Nitric Oxides (NO) and Nitrogen Dioxides
(NO2) – with NO2 being particularly dangerous due toits:
• Adverse effects on human respiratory systems
• Role as a precursor to tropospheric ozone andparticulate matter
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From the Vehicles We Drive…to the Air We Breathe
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How Ozone Forms
As NOx Mixes with Air and Sun,Dreaded Ground Level Ozone and
Other Damaging Pollutants are Formed.
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U.S. NO2 Emission Density
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What Does this Mean to All of Us…
and to Our Grandchildren?
• In 2014, the World Health Organization estimated 7million premature deaths worldwide due to air pollution.
• An MIT study estimated 200,000 premature deaths in theU.S. each year due to air pollution.
• The International Energy Agency estimates China’ssmog is reducing life expectancy by 25 months.
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The Health Costs of Pollution
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The Monetary Costs of Pollution
• The World Bank estimates air pollution is costingthe world economy more then $5 trillion annuallyin welfare costs.
• The International Energy Agency estimatesadditional costs in life-saving innovations as:
– $2.3 trillion for advanced pollution controls in vehicles
– $2.5 trillion for advances in the energy sector
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The Science BehindPhotocatalytic Reactions
The use of Titanium Dioxide (TiO2) as aphotocatalyst was discovered in 1972.
• When exposed to UV light, TiO2 creates hydroxylradicals and superoxides.
• These intermediates then oxidize to reduce NOx, whichoxidizes into water-soluble nitrates that are washed wayby rainfall.
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Proven in Application: Roofs
A CNRS study ofNoxite® roofingdemonstrates an89% reductionin NOx!
Source: Centre National de la Recherche Scientifique – French National Scientific Research Centre
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Roofing Case Study
• Sustainable
• Proven in Performance
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Proven in Application: Buildings
Torre de Especialidades Hospital,
Mexico City, Mexico
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Proven in Application: Buildings
Palazzo Italia, 2015 World’s Fair,
Milan, Italy: 9,000 sq.m Tiocem®
Photocatalytic Concrete with TIO2
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Proven in Application: New Concrete Roads
Borgo Palazzo Street,
Bergamo, Italy: New Roadways,
Tiocem® Photocatalytic Concrete
with TIO2
Two Weeks ofTesting:
NOx reductionsof 41-49%
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Charlotte County, FLA.R.A.-1 Ti® polymerized
asphalt rejuvenator with
pollution remediation
• Maltene-Replenishing
• Air-Purifying
• Deep Penetration
• Increased Longevity
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Proven in Application:Existing Concrete Roads
Austin, TX, TxDOT – I-35PCC Softer Aggregate PavementLitho 1000 Ti® concrete sealerand hardening agent with pollution remediationand Skidabrader surface texturing• Maltene-Replenishing• Air-Purifying• Deep Penetration• Increased Longevity• Enhanced Texturing
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Proven in Application: All Roads
• Marginally more expensivethan regular “top of the curve”preservation strategies
• Significantly contributory toremediating air pollution
• Equally effective on new andexisting concrete andasphalt roadways
VehicleExhausts
Pavementsurface
A.R.A.- 1 TiorLitho 1000TiTreated Surface
NOx oxidized to NO3
Inert NO3 washed away
gas
Photocatalytic Pavementswith
Titanium Dioxide fortified
A.R.A –1 Ti or Litho 1000Tifor
ASPHALT CONCRETE
Inert
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Imagine the Possibilities
Pollution-Remediating…
• Roofs
• Buildings
• Roadways
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The Need is Clear, The Time is Now
The future istheirs…theresponsibility, ours.
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Chris Evers
727-638-1699