ZEMCH 2015 - International Conference Proceedings | Page 846

whereas this area affects the average of the plant’s purification ability. Generally, the wider a foil is
the more perspiration is allowed to happen while presenting bigger exposed portion of the leaf
to remove chemical toxic out in the air (Wolverton 2013).
The US’s Environmental Protection Agency (EPA) had set a range of the pollution amount for public buildings after going through a lot of research and tests. For decades, they examined big facilities like health, nursing and commercial buildings, and the outcomes of those experiments were
released for public in 1998 (Wolverton 2013). The table below extracts the organization’s findings.
Table 11: Plants properties (Wolverton 2013)
Chemicals

Hospitals

Nursing Homes

Office Buildings

Chemicals

Chloroform

---

.004

.002

Chloroform

Trichloroethylene

.002

.001

.005

Trichloroethylene

Benzene

.003

.003

.005

Benzene

Xylene

.013

.005

.022

Xylene

Formaldehyde

.106

.081

.173

Formaldehyde

7.2. Improve Acoustics
To take advantage of the sound reduction for a plant; firstly, a major plant vessel or pot is required,
which would allow for sufficient compost and top dressing exposures that could highly affect.
Secondly, a collection of various species should be introduced and sized, which could perform
more efficiently while smaller and well-distributed groups may work better than one large area
covered. Accordingly, less focusing for better result, showing green elements in corner rather
than the center; the reason of this settlement is to put the absorber element right on the face of
the reflective wall to block the way of the sound waves of scattering over the room, as shown in
Figure 12.

Figure 12: Sound sorb array (Freeman 2008)

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ZEMCH 2015 | International Conference | Bari - Lecce, Italy