Table 4 Parameters employed for assessing human exposure risks.

CDI _oral

CDI via ingestion, mg/(kg · d)

CDI _dermal

CDI via dermal contact, mg/(kg · d)

CDI _particle

CDI via particle inhalation, mg/(kg · d)

AF

skin adherence factor, 1, mg · cm²

IR

ingestion rate of soil, 100, mg/d

BW

body weight, 55.9, kg

CF

conversion factor, 10⁻⁶, kg · mg

ED

exposure duration, 30, a

EF

exposure frequency, 350, d/a

SA

surface area of the skin, 5000, cm²/d

AT

average time, 365 d · a⁻¹ × 70, d

C _soil

concentration of the exposure contaminant, mg/kg

ABS

absorption factor, 0.001

PI

retention fraction of inhaled particulates in body

DA

daily air inhalation rate, m³/d

fs

fraction of soil-borne particulates

SF

slope factor, kg · d/mg

RfD

reference dose, mg/(kg · d)