Delhi Launches Study on Smog-Eating Road Coatings
Delhi has initiated a time-bound feasibility study on using photocatalytic coatings to reduce air pollution. The government plans to test titanium dioxide (TiO₂)-based surfaces on roads, pavements and public spaces. This move aims to lower harmful pollutants like nitrogen dioxide (NO₂) and hydrocarbons. The Environment department will sign a memorandum of understanding (MoU) with a scientific institution within 30 days. Field trials and evaluations will follow. Monthly progress updates will be issued, with a final report due six months after the MoU is signed.
Photocatalytic Coatings and Their Function
Photocatalytic coatings use titanium dioxide to break down pollutants in the air. When exposed to sunlight, TiO₂ acts as a catalyst to convert harmful gases into less toxic substances. This process is called photocatalysis. It helps reduce nitrogen oxides and volatile organic compounds. The coatings can be applied to concrete, asphalt and other construction materials. They are chemically stable and low-cost, making them suitable for large-scale urban use.
Government’s Approach and Targets
Delhi’s Environment Minister emphasises practical, science-based solutions. The study will assess effectiveness, safety and cost-efficiency. If successful, the government will propose citywide deployment. Priority areas include busy roads, markets and public spaces. The aim is visible improvement in air quality that residents can experience daily. The initiative is part of a broader 24×7, 365-day environmental action plan targeting pollution reduction through technology and science.
Scientific and Technical Considerations
Experts show TiO₂’s compatibility with traditional building materials. Research shows photocatalytic materials can aid gaseous pollution control and environmental cleaning. The study will also identify credible suppliers to ensure quality and sustainability. Safety measures will be closely monitored to prevent any adverse effects. The government encourages innovation through challenges inviting ideas from students, startups and experts to accelerate pilot projects.
Potential Impact on Urban Air Quality
If proven effective, photocatalytic coatings can supplement existing pollution control methods. They offer a passive, continuous way to improve air quality without active energy consumption. This technology could reduce smog and associated health risks in densely populated cities. Long-term deployment may enhance urban living conditions by lowering respiratory illnesses and environmental degradation.
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