Agriculture Reference
In-Depth Information
100
Olivier Soil
80
C
o
= 100 mg/L
MRM
SOM
60
80
40
40
20
20
0
10
0
100
200
300
400
500
100
Sharkey Soil
80
MRM
SOM
60
C
o
= 100 mg/L
40
80
20
40
0
0
100
200
300
400
500
Time, Hours
FIGURE 6.22
Experimental and predicted As(V) concentration versus time for Olivier and Sharkey soil and
several input (initial) concentrations (
C
o
). Predictions were obtained using the multireaction
and second-order models.
successfully utilized the SOM model to describe Cu adsorption as well as
desorption or release following sorption. They concluded that the use of con-
secutive irreversible reactions (
k
s
in Figure 6.1) provided improvements in
the description of the kinetic sorption and desorption of Cu compared to the
concurrent irreversible reaction (
k
irr
). This finding is contrary to that from
this study for arsenic adsorption for all three soils. Such contradictions are
not easily explained and are thus a subject for future research.
Search WWH ::
Custom Search