Table 2.

The reference RfD and SF of heavy metals.

	RfDing (mg·kg−1·day−1)	RfDinh (mg·kg−1·day−1)	RfDder (mg·kg−1·day−1)	SFinh (kg·day·mg−1)
Cd	1.00 × 10−3	1.00 × 10−3	1.00 × 10−5	6.10
Cr	3.00 × 10−3	2.86 × 10−5	6.00 × 10−5	4.10 × 10
Ni	2.00 × 10−2	2.06 × 10−2	5.40 × 10−3	8.40 × 10−1
Co	3.00 × 10−4	5.71 × 10−6	1.60 × 10−2	9.80
Cu	4.00 × 10−2	4.02 × 10−2	1.20 × 10−2
Mo	5.00 × 10−3	4.95 × 10−3	1.90 × 10−3
Pb	3.50 × 10−3	3.52 × 10−3	5.25 × 10−4
V	5.04 × 10−3	7.00 × 10−3	7.00 × 10−5
Zn	3.00 × 10−1	3.00 × 10−1	6.00 × 10−2