Here’s a link to a short article about how common houseplants can be very effective at filtering the air indoors: roughly the same quality filtration as human-built devices costing ten times as much. (Their source wasn’t the University of Georgia study directly, but Science Daily.)

Of the 28 species tested, Hemigraphis alternata (purple waffle plant), Hedera helix (English ivy), Hoya carnosa (variegated wax plant), and Asparagus densiflorus (Asparagus fern) had the highest removal rates for all of the VOCs introduced.

Also these plants were suggested for their capacity to remove the chemicals in parenthesis:

green spider plant (formaldehyde)
peace lily (benzene)
gerbera daisy (trichloroethylene)
areca palm (capacity to be a humidifier)