Application of Zero-valent Iron Nanoparticles for Environmental Clean Up - Advanced Materials for Agriculture, Food and Environmental Safety - page 392

Contaminant
category

Contaminant removed Reaction mechanism Remarks References

Chlorinated
aliphatic,
alicyclic and
aromatic
compounds

Lindane Dihaloelimination via

TeCCH to benzene

Rate constant not af ected by Fe 0 dose and
type.

[137]

Lindane Dechlorination to

benzene (major) and
chlorobenzene (minor
product)

Dechlorination rate increases with
temperature and nFe 0 dosage; decreases
with solution pH

[38]

Pyrene Reduction Removal dominated by iron dosage, follows

pseudo i rst order kinetics

[48]

Pentachlorophenol (PCP) Complete pyrolysis yielding

CO 2 , HCl, Cl -

nFe 0 removal rate faster than that of
activated carbon in the presence of
microwave irradiation

[138]

Alachlor Complete dechlorination Rate constant for nFe 0 is comparatively

higher than micro Fe 0 .

[139]

Azo dye Congo Red Reduction Decolorization follows pseudo i rst order

reaction. Increase in nFe 0 dosage enhance
decolorization rate.

[140]

Inorganic
contaminants

Cr(VI) Reductive precipitation and

immobilization

Surface area normalized rate constant 25
times greater than that of iron powder.

[60]

As(V) Removal by adsorption

followed by reduction to
As(III)

nFe 0 -As(V) forms an inner-sphere surface
complexation. HCO 3 - , H 4 SiO 4 0 , H 2 PO 4 2-
are potential interfering agents in As(V)
adsorption reaction.

[61]