Environmental Engineering Reference
In-Depth Information
1.8
0.8
0.6
2
3
5
0.4
11.5
0.2
0.0
10
100
Particle Size (nm)
FiguRe .  Calculated.apparent.solubility.for.particles.of.various.size.and.densities;.num-
bers.represent.particle.densities.in.g/cm 3 .
in.suspension..(Conversely,.and.as.illustrated.in.Section.6.4,.adsorption.to.dissolved.
organic.matter.in.surface.water.can.keep.some.nanoparticles.in.suspension.)
Within. the. environment,. changes. in. particle. size. usually. occur. as. the. result. of.
three.types.of.processes:.(1).solution/dissolution,.(2).adsorption,.and.(3).agglomeration..
Because.nanomaterials.are.deined.by.initial.particle.size.and.not.by.composition,.it.is.
dificult.to.generalize.and.predict.their.chemical.properties..However,.a.few.assumptions.
can.be.made.based.on.common.requirements.necessary.to.form.stable.nanoparticles:
FiguRe .  Projected.proportional.suspension.of.zero-valent.iron.nanoparticles.(ρ x .=.7000.
kg/m 3 ).in.aqueous.suspension.based.on.the.distribution.of.Nurmi.et.al..[1].
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