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VF
Volatilizzazione in ambienti aperti / Suolo Superficiale
ASTM E 1739-95 1739 95 / PS 104-98 104 98 + UNICHIM
ss
'
eff
2W
ρ s Ds
H
( 1)
= ⋅
⋅10
U δ πτ
air
air
W ρ d
( ϑ + k ρ + Hϑ
)
w
s
s
a
3
(D.1)
'
s 3
VF ss ( 2)
= ⋅10
U airδ
airτ
(D.2)
CONCAWE
VF
VF
ss
ss
Hρ
eff 1
( 3)
=
⋅ A'⋅D
⋅ ⋅10
'
s
U W δ ⋅
L
( 4)
=
Q
C
air
EPA SSG
⋅
air
s
[ θ H + k ρ + θ ]
A
as
3.
14D
Aτ
⋅10
2ρ
D
−4
s
s
ws
s
3
D
eff
s
=
D
(D.4)
(D.5)
a
ϑ
ϑ
3.
33
a
2
e
D
+
H
w
ϑ
⋅
ϑ
3.
33
w
2
e