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Activated charcoal can absorb odors that pass by it, but only works in a small vicinity and will not be able to remove toxins from the air and just like a sponge when it gets full with water, carbon has the same potential of releasing the odors right back into the environment

More formaldehyde was released when the devices were set to higher voltages

AROEVE MK01 Air Purifier The AROEVE MK01 uses dual-channel 360-degree air inlets to pull in air from every direction, covering rooms up to 287 ft per hour

doi:10.1111/j.1476-5381.2008.00046.x Morgan CJ et al

There are very few teen-agers desperate to look like Bertrand Russell