Environmental Engineering Reference
In-Depth Information
Table 6.2
Overview of the relevant tracer studies on soil ingestion rates by children
Mean
ingestion
rate (mg/d)
(
∗
)
Median
ingestion
rate (mg/d)
(
∗
)
Data
used
Number of
children
Age
(years)
Season/
climate
References
Area
Duration
Method
Davis et al.
(
1990
)
Davis
et al.
(
1990
)
101
2-7
61
42
Three-city area in
south-eastern
Washington
State
Primarily
summer/desert
climate: cold in
winter, very hot
in summer and
very low
precipitation
year-round
4-day period
Correction for the contribution
of tracer elements from
food, vitamins and
medications, evaluation of
the extent to which
differences in tracer
concentrations in house dust
and yard soil impact
estimated soil ingestion
rates
Davis and
Mirick
(
2006
)
Subset of
Davis
et al.
1990
12
37
30
11 consecutive
days
Correction for the contribution
of tracer elements from
food, vitamins and
medications, daily diary of
activities for 4 consecutive
days during the study
period, collection of soil and
house dust samples
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