. 2020 Apr 17;6(4):e03732. doi: 10.1016/j.heliyon.2020.e03732

Table 1.

Description of the variables in Health Risk Assessment.

Parameters	Description	Value	Unit	Source
THQ	Target Hazard Quotient	-	-	-
TTHQ	Total Target Hazard Quotient	-	-	-
ADI	Average Daily Intake	-	-	-
CS	Concentration of Metal	-	$mg / kg$	From this study
ing	Ingestion Rate (Child)	0.0002	$kg / day$
EDnc	Exposure Duration for Non-Carcinogenic	6	$years$	RAIS 2013
EDc	Exposure Duration for Carcinogenic	70	$years$	USEPA (2007)
EF	Exposure Frequency	365	$Days / years$	USEPA (2007)
ATnc	Average Time of Exposure for Non-Carcinogenic Element	EDnc $\times 365 = 2190$	days	RAIS 2013
ATc	Average Time of Exposure for Carcinogenic Element	EDc $\times 365$ = 25550	days	RAIS 2013
BW	Body Weight	15	$kg$	RAIS 2013
SA	Surface Area	2100	$c m^{2}$
ABS	Absorption Factor	0.001,0.03	$mg / c m^{2}$	USEPA (2004)
CF	Conversion Factor	$1 \times 10^{- 0}$	$kg / mg$	USEPA (2004)
AF	Adherence Factor	0.2	$mg m^{- 1}$	-
RFD	Reference Dose	-	$mg / kg - day$	RAIS 2013
CSF	Cancer Slope Factor	-	$mg / kg - day$	RAIS 2013