The Interactions among the Heavy Metals in Soils and in Weeds and Their Antioxidant Capacity under the Mining Activities in Thai Nguyen Province, Vietnam

Table 4

DPPH scavenging capacity (SC%) of the plant extracts.

Plant species	Plant tissues	DPPH SC% at 100 μg/mL	DPPH SC% at 500 μg/mL	SRSA SC% at 100 μg/mL	SRSA SC% at 500 μg/mL
C. parasiticus	Roots	88.1 ± 2.61	87.9 ± 1.96	9.65 ± 5.38	14.6 ± 5.01
	Shoots	29.2 ± 7.34	80.4 ± 13.9	7.83 ± 1.03	12.3 ± 9.53
	Leaves	37.7 ± 10.1	77.9 ± 6.10	11.6 ± 0.00	6.48 ± 11.1
D. linearis	Roots	61.5 ± 26.1	81.1 ± 9.79	5.94 ± 3.21	17.0 ± 7.46
	Shoots	64.5 ± 28.9	76.6 ± 11.1	5.44 ± 3.05	12.8 ± 5.05
	Leaves	31.8 ± 16.0	66.0 ± 15.1	3.99 ± 1.74	10.1 ± 0.90
P. calomelanos	Roots	44.5 ± 24.2	69.2 ± 21.0	26.3 ± 2.51	36.0 ± 4.82
	Shoots	26.8 ± 12.9	65.0 ± 20.2	10.5 ± 6.41	18.8 ± 11.8
	Leaves	17.3 ± 5.04	47.3 ± 8.22	11.4 ± 5.41	22.4 ± 8.39
P. vittata	Roots	41.7 ± 20.0	83.5 ± 9.53	29.9 ± 9.13	54.4 ± 5.81
	Shoots	31.0 ± 11.4	61.9 ± 16.3	10.8 ± 2.81	30.3 ± 6.11
	Leaves	46.2 ± 11.8	89.3 ± 0.63	14.9 ± 6.04	24.3 ± 5.67
Ascorbic acid	—	91.3	—	—	—
Catechin	—	—	—	48.7	—