Table 1.

The parameters of human health risk assessment [11, 25]

Parameter	Meaning	Unit	Age groups
			Adult	Child
HQ	Hazard Quotient	-	-	-
C	Concentration of metal	mg kg−1	-	-
EF	Exposure Frequency	days year−1	365	365
ED	Exposure Duration	years	30	6
FIR	Food Ingestion Rate	mL day−1	175	239
BW	Body Weight	kg	70	15
AT	Average Time	days	ED×365	ED×365
RFD	Reference Dose	mg kg−1 day−1	3.50E-03	3.50E-03