The system was actually invented by Delft University of Technology researcher Bob Ursem, who came up with the idea of ionizing smog particles after watching tiny bits of salt, dust and organic matter flow off the Atlantic Ocean onto a Dutch beach. "They floated into the dunes toward some bushes," Ursem says, "and there was a lift effect, carrying them above the bushes." The particles, negatively charged from friction, were avoiding contact with negatively charged foliage. "They floated above the bushes, indicating that the electrical force is greater than the gravity force," Ursem says.
A Beijing air cleaner would require fans, say officials the research and development firm Environmental Nano Solutions (ENS) Europe, which bought the concept from Delft University and is developing it for commercial marketing.
Plans for the Beijing device center on a large octagonal structure eight meters tall with intake vents at the top and exhaust vents in the middle, out of which will flow smog-free air. The steel structure will weigh about nine metric tons. To demonstrate the absence of smog in the freshair zone, lasers will shoot out beams, which will be invisible in a particle-free environment. ENS Europe's smog buster will clean a dome-shaped area 30 meters in diameter to a height of about five meters. The whole thing, Pau says, will "resemble a medieval Chinese palace."
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