Pollution and Risk Assessment of Heavy Metals in the Sediments and Soils around Tiegelongnan Copper Deposit, Northern Tibet, China

Table 5

Potential ecological RI for heavy metals in sediments and soil.

Sampling sites	Cu	Pb	Zn	As	Cd	Cr	Ni	Hg	RI
R1	11.73	7.84	1.85	15.68	141.89	1.50	3.22	57.14	240.86
R2	662.50	7.81	8.67	47.59	186.49	1.16	9.53	114.29	1,038.03
R3	242.35	5.29	4.87	20.25	68.92	0.90	9.69	38.10	390.36
R4	254.59	5.36	6.79	19.44	133.78	1.56	13.24	57.14	491.91
R5	319.90	4.96	9.76	15.86	202.70	1.00	22.12	38.10	614.40
R6	256.12	4.96	8.18	15.80	178.38	1.18	16.87	57.14	538.64
R7	11.73	3.80	1.04	10.25	32.43	1.81	4.91	57.14	123.13
R8	9.38	4.76	1.43	14.37	71.41	2.87	8.90	32.09	145.22
Soils	25.43	4.64	1.31	12.75	58.11	1.55	4.57	60.32	168.68