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THE IN SITU PILOT-SCALE PHYTOREMEDIATION OF AIRBORNE VOCS AND PARTICULATE MATTER WITH AN ACTIVE GREEN WALL
Pettit, T., P.J. Irga, and F.R. Torpy.
Air Quality, Atmosphere & Health 12(1):33-44(2019)

This work used pilot-scale trials to test the capacity of potted plants, a passive green wall, and an active green wall (AGW) to remove particulate matter (PM) and total VOCs (TVOCs) from a room in a suburban residential house, followed by an assessment of the AGW's potential to remove these pollutants from a classroom. In the residential room, the AGW maintained TVOCs at significantly lower concentrations compared to potted plants and the passive green wall throughout the experimental period (average TVOC concentration 72.5% lower than the control), with a similar trend observed for PM. In the classroom, the AGW reduced the average TVOC concentration by ~28% over a 20-min testing period compared to levels with no green wall and a filtered HVAC system in operation. The average ambient PM concentration in the classroom with the HVAC system operating was 101.18 µg/m3, which was reduced by 42.6% by the AGW. With further empirical validation, AGWs might be installed to clean indoor air through functional reductions in PM and TVOC concentrations.



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