436
100
- ~ 0
- Q) 80
0)
co
..... c: 60
Q)
0
~
Q)
a. 40
co
>
0 20
E
Q)
~
0
o 20
A. Matsuyama et al.
40
60
80 100 120 140
Heating time(min.)
Fig. 10. Variable amounts of iron chloride added to quartz sand (heated to 300 DC)
When the artificially contaminated soils made with standard sand and volcanic
ash soil were heated to 300°C, the iron chloride added to the artificially
contaminated soil made with volcanic ash soil was slower at removing mercury
than the iron chloride added to the artificially contaminated soil made with
standard sand. The difference, however, was minor. From our testing, we have
concluded that although it is difficult to determine the effect of iron chloride
added to artificially contaminated soils (except for sand or sandy soil) when the
soils are heated to 200 °C, when they are heated to 300°C, regardless of soil type,
the amount of iron chloride that should be added is equal to or slightly more
than the amount of mercury mol contained in the artificially contaminated soils.
100
;? o
-80 Q)
g>
"E 60
Q)
~
~40
co
~ 20
E
~
o
o 20
--"""-r-'
~o iro~ chlor!de adbed
___::::I-::::~::::·--------~I::::::::r::----i
'
.
.
40
60
80 100 120 140
Heating time(min)
Fig. 11. Variable amounts of iron chloride added to volcanic ash soil (heated to 300 DC)