A study by University of Georgia researchers states "plants have the potential to significantly improve the quality of indoor air with respect to harmful volatile organic compounds such as benzene, toluene, octane, trichloroethylene (TCE), and α-pinene". It suggests implementation and certification of "phytoremediation" programs for indoor applications from homes and offices to large scale environs.
The study indicates five top choices for aiding air quality:

Hemigraphis alternata, red ivy

Hedera helix, English ivy

Hoya carnosa, porcelin flower

Asparagus densiflorous, asparagus fern

Tradescantia pallida, purple heart
Quantification of Carbon Assimilation in Interiorscape Plants In Simulated and In Situ EnvironmentsBodie V. Pennisi1, Associate Professor and Marc van Iersel2, Professor
1 University of Georgia, Department of Horticulture, Griffin, GA 30233
2 University of Georgia, Department of Horticulture, Athens, GA 30602-7273
http://greenplantsforgreenbuildings.org/attachments/wysiwyg/1/projectcarbon.pdf