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Table 1. Characteristics of test soils
Components
Na
(%)
Mg
Al
Si
S
K
Ca
Ti
V
Mn
Fe
Hg
Organic
substance
Standard
sand
1.03
4.46
85.52
6.78
0.52
1.69
Volcanic ash
Quartz sand
soil
4.04
27.20
33.06
Pure SiO,
0.38
1.12
0.65
2.76
0.16
0.51
30.12
5.24
A. Matsuyama et aJ.
Contaminated
soil
2.26
21.63
49.04
0.33
5.60
1.65
1.63
0.39
16.49
0.98
2.42
an automatic balance (four effective digits), the pure mercuric sulfide was
added and mixed with each soil to create the artificially contaminated soil
specially made for the tests. The concentration of the artificially contaminated
soil was set at 2000 mg Hg/kg of dried soil, the highest concentration among
mercury contaminated soils sampled in Japan.
2. Artificially contaminated soil made for the tests and the catalysts.
The catalysts listed in Table 2 were added to each artificially contaminated soil
made in process (1). The amounts of catalyst added to the soil was ten
times greater (5 x 10- 4 mol) than the amount of mercury mol (5 x 10- 5 mol) in
the soil.
3. Artificially contaminated soil made for the tests and the iron chloride.
Table 2. Compounds added to the soils
Metal elements
Fe
Mn
Ni
Zn
Chemical formulas
FeCI, . 4H, O FeOOH
Fe304
Fe, 03
FeS04
MnCi2
Mn02
MnS04
NiCI,'6H20
NiO
NiS04 '7H20
ZnCi,
ZnO
ZnS04 '7H20