Biomedical Engineering Reference
In-Depth Information
Figure 10.
Magnetic force as function of the distance between the magnet and the sample to the
magnetic biofoam (PU-5).
oil remoVal CaPaBility oF the maGNetiC BioFoam
As proposed, the magnetic biofoam can be used to remove spilled oil over the water.
The obtained results are shown in
Figure 11
,
which allowed performing the linear
regression of the data. The results are shown in the empirical model described by the
Eq. 2.
(
)
(
)
3
´´
0
Eq.2
RO =
-
1.81
±
2.19
´
10
+
4.1
±
0.1
10
MB
In the Eq. 2,
RO
is the removed oil amount and
MB
is the amount of the magnetic
biofoam used in the test.
The results shown in Figure 11 and in the Eq. 2 allow to infer that, inside the tested
interval, each gram of the magnetic biofoam is able to remove (4.1 ± 0.1)g of the petro-
leum from the water. Thus, a small portion of maghemite inside polyurethane biofoam
produces a strong magnetic attraction, enough to remove, completely, the mass of
biofoam soaked by petroleum. Therefore, these materials may be used in environmen-
tal recovery processes related to the oil spill on the water, besides providing nobler
uses to some of the renewable resources available. It produces a new perspective to
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