Table 3 Parameter values related to health risk assessment methods (adults and children).

From: Characteristics of heavy metal element content and health risk assessment in groundwater in Zhaojue area, Sichuan Province, China

Parameter

Meaning

Value

Unit

Adults

Children

Cw

The concentration of heavy metals

Measured values

Measured values

mg L−1

IR

Ingestion rate

1.542

1

L d−1

EF

Exposure frequency

365

365

d a−1

BW

The average body weight

58.1

15.0

kg

SA

Surface area in contact with the skin

18,000

6000

cm2

ET

Exposure time

0.6333

0.4167

h d−1

CF

Volume conversion factor

1

1

mL cm−3