Table 5.

Health risk assessment of heavy metal in medicinal materials

Elements	RfD (mg kg−1BW d−1)	EDI (mg kg−1 d−1)	AL		HI	EDI (mg kg−1 d−1)	SB		HI
			THQ	Contribution (%)			THQ	Contribution (%)
Cr	1.5 × 10–0	1.41 × 10–4	9.41 × 10–5	0.11	8.84 × 10–2	3.92 × 10–5	2.61 × 10–5	0.03	7.68 × 10–2
Ni	2.0 × 10–2	1.27 × 10–4	6.35 × 10–3	7.18		2.32 × 10–4	1.16 × 10–2	15.17
Cu	4.0 × 10–2	7.62 × 10–4	1.91 × 10–2	21.56		5.28 × 10–4	1.32 × 10–2	17.19
Zn	3.0 × 10–1	1.79 × 10–3	5.97 × 10–3	6.76		7.66 × 10–4	2.55 × 10–3	3.33
As	3.0 × 10–4	5.72 × 10–6	1.91 × 10–2	21.60		2.58 × 10–5	8.59 × 10–3	11.19
Cd	1.0 × 10–3	1.37 × 10–5	1.37 × 10–2	15.55		3.02 × 10–6	3.02 × 10–3	3.94
Hg	7.14 × 10–4	6.22 × 10–6	8.72 × 10–3	9.87		1.87 × 10–5	2.62 × 10–2	34.11
Pb	3.5 × 10–3	5.37 × 10–5	1.54 × 10–2	17.38		4.04 × 10–5	1.16 × 10–2	15.05

Elements	RfD (mg kg−1BW d−1)	RA			HI	EDI (mg kg−1 d−1)	SG		HI
		EDI (mg kg−1 d−1)	THQ	Contribution (%)			THQ	Contribution (%)
Cr	1.5 × 10–0	9.91 × 10–7	6.61 × 10–3	0.00	9.53 × 10–2	7.59 × 10–6	5.06 × 10–6	0.01	3.87 × 10–2
Ni	2.0 × 10–2	9.75 × 10–5	4.87 × 10–3	5.11		7.95 × 10–5	3.98 × 10–3	10.27
Cu	4.0 × 10–2	1.53 × 10–3	3.83 × 10–2	40.23		3.62 × 10–4	9.06 × 10–3	23.39
Zn	3.0 × 10–1	9.34 × 10–4	3.11 × 10–3	3.27		3.53 × 10–4	1.18 × 10–3	3.04
As	3.0 × 10–4	6.66 × 10–7	4.47 × 10–3	2.33		9.13 × 10–7	3.04 × 10–3	7.86
Cd	1.0 × 10–3	4.47 × 10–6	4.47 × 10–3	4.69		6.84 × 10–6	6.84 × 10–3	17.67
Hg	7.14 × 10–4	3.73 × 10–6	5.22 × 10–3	5.48		5.76 × 10–6	8.07 × 10–3	20.83
Pb	3.5 × 10–3	1.30 × 10–4	3.71 × 10–2	38.89		2.29 × 10–5	6.55 × 10–3	16.92

Annotation: contribution rate refers to the ratio of THQ value to HI value of an element