Agriculture Reference
In-Depth Information
some extent following their release to water. The reported size distribution
of selected ENMs in water is presented in Table 9.2. It can be seen that
the hydrodynamic Particle size is much greater than the individual particle
size in the dry phase, indicating that the aggregation is a common process
for ENMs in water.
TABLE 9.2
Reported Size Distribution of Selected Engineered Nanomaterials (ENMs)
In Water
ENMs
Individual Particle
Size (nm)
Hydrodynamic
Particle Size
(nm)
References
Ag
26.6 ± 8.8
216
Griffitt et al. (2008)
Cu
26.7 ± 7.1
94.5-447.1
Griffitt et al. (2008)
Al
41.7 ± 8.1
4442
Griffitt et al. (2008)
Co
10.5 ± 2.3
224-742
Griffitt et al. (2008)
Ni
6.1 ± 1.4
44.9-446.1
Griffitt et al. (2008)
TiO
2
20.5 ± 6.7
220.8-687.5
Griffitt et al. (2008)
ZnO
50-70
320 ± 20
Zhang et al. (2008)
10
SiO
2
10
740 ± 40
Zhang et al. (2008)
Fe
2
O
3
5-25
200 ± 10
Zhang et al. (2008)
Fe
2
O
3
9.2
46.2
Baalousha et al. (2008)
Fe
3
O
4
<10
120
IIIes and Tombacz (2006)
CeO
2
8
323-2610
Xia et al. (2008)
Al
2
O
3
60
763
H.H. Wang et al. (2009)
CdSe/ZnS
2.1
˜12.5
Slaveykova et al. (2009)
The particle size distribution of commercially available nano-particles
(Sigma-Aldrich) in aqueous system, measured by Laser Diffraction Par-
ticle Size Analyzer (Model-LS 13320) at 23°fixed detector angle clearly
size claimed in dry phase
(Tapan et al., 2009). This might be due to the fact
that the negative charged surface of the particles had strong affinity to-
