Civil Engineering Reference
In-Depth Information
15.7 Appendix: acronyms and defi nitions
Bi
2
S
3
Bismuth sulphide
BTEX
Mixture of benzene, toluene, ethylbenzene and xylenes
CaBi
2
O
4
Calcium bismuthate
CdS
Cadmium sulphide
CdSe
Cadmium selenide
CFCs
Chlorofl uorocarbon compounds
CH
4
Methane
CO
Carbon monoxide
CPVC
Critical pigment volume concentration
e
−
cb
Excited electron in the conducting electronic band of the cata-
lyst as a consequence of the absorption of incident radiation
h
ν
Radiation (nm)
h
+
vb
Hole created in the valence electronic band of the catalyst due
to the excitation of an electron as a consequence of the absorp-
tion of the incident radiation
H
2
O
Water
HNO
3
Nitric acid
In
2
O
3
Indium oxide (III)
k
Photocatalytic rate constant
K
Adsorption coeffi cient,
μ
g (adsorbed compound)/g (sorbent)
N
2
O
Nitrous oxide
NO
Nitric oxide
NO
2
Nitrogen dioxide
O
2
−
Superoxide anion
OH
•
Hydroxyl radical
r
Photocatalytic reaction rate, (
μ
g/m
3
catalyzed compound)/h
SnO
2
Tin oxide (IV)
SO
2
Sulphur dioxide
SrTiO
3
Strontium titanium oxide
TiCl
4
Titanium chloride (IV)
TiO
2
Titanium dioxide
UV
Ultraviolet radiation with wavelengths ranging from 1 to
400 nm
UV-A
UV radiation with wavelengths ranging from 320 to 400 nm
V
2
O
5
Vanadium oxide (V)
VOCs
Volatile organic compounds
WO
3
Tungsten oxide (VI)
ZnO
Zinc oxide
ZnS
Zinc sulphide
α
-Fe
2
O
3
α
-ferric oxide
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