Biomethylation of Arsenic in Contaminated Soils - Environmental Contamination: Health Risks and Ecological Restoration - page 239

TABLE 12.1
Summary.of.Arsenic.Biomethylation.Rates.under.Different.Methylating.Conditions.from.Various.Studies

Methylation
Products
Measured

Arsenic
Source

Extentof
Biomethylation a

Incubation
Method

Environmental
Conditions

Incubation
Time Microorganisms Substrate References

Yield.(w) Yield.

(%)

100.mg.As(V)/
kg.soil,.
newly.spiked

0.001 No.inoculation Soil Aerobic,.22°C,.

pH.6.9,.350.g.
H 2 O/kg.soil

Cellulose 70.days Arsine Burau.and.

Gao.
(1997)

100.mg.
As(III)/kg.
soil,.newly.
spiked

0.007 No.inoculation Soil Aerobic,.22°C,.

pH.6.9,.350.g.
H 2 O/kg.soil

Cellulose 70.days Arsine Burau.and.

Gao.
(1997)

100.mg.
MMAA/kg.
soil,.newly.
spiked

0.021 No.inoculation Soil Aerobic,.22°C,.

pH.6.9,.350.g.
H 2 O/kg.soil

Cellulose 70.days Arsine Burau.and.

Gao.
(1997)

100.mg.CA/kg.
soil,.newly.
spiked

0.057 No.inoculation Soil Aerobic,.22°C,.

pH.6.9,.350.g.
H 2 O/kg.soil

Cellulose 70.days Arsine Burau.and.

Gao.
(1997)

10.mg.
Na 3 AsO 4 /kg.
soil,.newly.
spiked

1 No.inoculation Aerobic,.pH.

5.3,.25%-35%.
ield.capacity

Ground.
soybean.
meal

160.days DMA,.TMA Woolson.

(1977a)

10.mg.
Na 3 AsO 4 /kg.
soil,.newly.
spiked

1.8 No.inoculation Anaerobic,.pH.

5.3,.25%-35%.
ield.capacity

Ground.
soybean.
meal

160.days DMA,.TMA Woolson.

(1977a)

(continued)