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TESTING THE SINGLE-PASS VOC REMOVAL EFFICIENCY OF AN ACTIVE GREEN WALL USING METHYL ETHYL KETONE (MEK)
Torpy, F., N. Clements, M. Pollinger, A. Dengel, I. Mulvihill, C. He, and P. Irga.
Air Quality, Atmosphere & Health 11(2):163-170(2018)

A novel approach to quantifying VOC removal effectiveness by an active living green wall uses a mechanical system to force air through the substrate and plant foliage. After developing a single-pass efficiency protocol to understand the immediate effects of the system, an active green wall was installed into a 30-m3 chamber representative of a single room and presented with the contaminant 2-butanone (methyl ethyl ketone, or MEK), a VOC commonly found in interior environments through its use in textile and plastic manufacture. Chamber inlet levels of MEK remained steady at 33.91 ± 0.541 ppbv. When the forced-air system drew the contaminated air through a green wall growing in a soil-less medium containing activated carbon, the combined effects of substrate media and botanical component within the biofiltration system showed statistically significant VOC reduction, averaging 57% single-pass removal efficiency over multiple test procedures and thus indicating the potential of active biofiltration in reducing VOC exposure in the indoor environment. This paper is Open Access at https://link.springer.com/article/10.1007/s11869-017-0518-4.



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