Table 2.

Heavy metal concentrations (mg/kg) in dry atmospheric deposits collected through twenty sites from southern coastal of Sfax

Factor	Description	Unit	Value		References
			Children	Adults
C	Concentration of metals in dusts	mg/Kg			Present study
IngR	Ingestion rate of dust	mg/day	200	100	ESAG, 2009; [57, 58]
EF	Exposure frequency	days/year	350	350	[65]; [66]; ESAG, 2009
ED	Exposure duration	years	6	24	[57, 58], [67]
BW	Average body weight	Kg	15	70	[68]; [33]
AT	Average time	days/year	365 x ED	366 x ED	[60]; ESAG, 2009; [69]
CF	Conversion factor	kg/mg	1 × 10−6	2 × 10−6	[69]
InhR	Inhalation rate of dust	m3/day	7.63	12.8	[67]
PEF	Particular emission factor	m3/Kg	1.36 × 109	1.36 × 109	[57, 58]
SA	Surface area of skin exposed to dust	cm2	1600	4350	[60]; ESAG, 2009
AF	Skin adherence factor	mg/cm2	0.2	0.7	[70]; [71]
ABF	Absorption factor (Dermal)	unitless	0.001	0.001	[72]; [57, 58]; [73]