Conditioning with Lime and Fertilizer Improves Ionic Rare Earth Mine Tailings

Table 2

The heavy metal content of the soil substrate in rare earth mine tailings (mg/kg).

	Cd	As	Pb	Cr	Cu	Ni	Zn	ΣREEs	La	Ce	Nd	Y
Tailing	0.49	24.83	50.40	52.64	47.86	14.12	120.23	673.13	96.69	224.78	105.02	95.24
Risk screening values^a	0.3	40	70	150	50	60	200	—	—	—	—	—
Risk intervention values^a	1.5	200	400	800	—	—	—	—	—	—	—	—

^aRisk control standard for soil contamination of agricultural land (GB15618-2018)；^b“—” no standard values.