Parameters

Description

Units

Values

Reference

Adult

Children

IRs

Ingestion rate of water

L·d−1

2.2

1.2

(Custodio et al. 2020)

EF

Exposure frequency

d·a−1

350

320

ED

Exposure duration

a

70

6

BW

Average body weight

kg

70

15.9

(Custodio et al. 2020)

AT

Average exposure time

d

365 × ED (non-carcinogenic)

(Meng et al. 2021)

365 × 70 (carcinogenic)

SA

Surface area of skin

cm2

18,000

6600

(Custodio et al. 2020)

AF

Skin adherence factor

mg·(cm2·d)−1

0.58

1

(Custodio et al. 2020)

ABS

Dermal absorption factor

unitless

0.001 (non-carcinogenic)

(Custodio et al. 2020)

0.004-(non-carcinogenic for Pb)

0.01 (carcinogenic)