As pedestrians walk on a walkway, instead of wasting good energy, the pressure could be used to transfer electromagnetic induction creating kinetic energy which can then be used to power devices.
Jose Luis Moracho Amigot and Angel Moracho Jimenez direct PVT (Pavimentos de Tudela) in Navarra, Spain, a company with more than 30 years of experience specializing in the manufacture of non-slip outdoor Granicem pavements.
In 2009, they adapted the system developed by Italcementi of Italy, to manufacture paving stones whose photosynthetic, concrete-titanium dioxide composition would enable them to absorb particulate matter, nitrogen oxides (NOx) and volatile organic compounds (VOC), and render them harmless.
Their patented product, ecoGranic, bio-mimics the performance of chlorophyll in plants. A top layer comprises oxide additives titanium incorporating a catalyst that is activated by sunlight, which then converts pollution that go with the rain nitrates and carbonates and the wind until it reaches where vegetation is removed. The lower layet consists of recycled materials.
ISO rule trials made at prestigious laboratory of the Dutch Twente University, and field studies carried out at different sites, showed ecoGranic’s decontaminating efficiency at up to 56% of nitrous oxide degradation.
A sidewalk the size of a soccer field with ecoGranic would eliminate pollution from approximately 4,000 vehicles. Following the success of three streets repaved with ecoGranic in Spain’s capital, Madrid, Plaza de la Cruz, an entire 10,800 ft² (1,000 m²) square in La Rioja, was repaved with ecoGranic, following by another square in Santander.
The technology soon spread to dozens of cities across Spain. The Navarra company currently has two plants, one located in Tudela and another in Cabanillas with a production capacity of more than 54,000 ft² (5,000 m2) per day. While PVT has signed with China to supply their ecoGranic decontaminating pavement, its co-inventor José Luis Moracho is working on a domestic version.
Meanhile Aira has produced a bicycle and a scooter which, by carrying the PVT ecoGranic tile vertically below its front handlebars can absorb CO₂ as it moves along. (pvt.es)
Discover Solution 287: Enzyme-based recyclable plastic
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