Characteristics of Heavy Metals and Pb Isotopic Composition in Sediments Collected from the Tributaries in Three Gorges Reservoir, China

Table 6

The 𝐸_𝑖 and RI values of heavy metals in surface sediment from TGR.

Sampling sites	𝐸𝑖 value of heavy metal								RI value
	Cr	Cu	Zn	Ni	As	Pb	Cd	Hg
S1	2.45	8.90	1.36	7.92	12.09	6.87	146.29	78.54	272.33
S2	2.16	6.40	3.22	7.31	8.23	5.67	780.00	113.67	933.98
S3	2.67	9.61	1.33	8.20	14.51	6.87	153.71	56.62	261.72
S4	2.32	5.95	0.93	6.92	10.08	4.08	100.82	37.48	175.50
S5	3.25	19.94	2.05	9.48	14.32	13.18	279.59	90.56	441.84
S6	2.50	6.28	1.15	7.19	8.16	4.43	110.10	42.37	189.37
S7	3.28	21.06	2.14	10.64	14.87	13.45	297.84	135.17	509.08
S8	2.79	11.66	1.45	8.08	10.41	7.90	218.35	74.04	342.77
S9	2.53	7.26	1.16	7.20	8.61	4.71	105.15	60.15	203.96
S10	3.12	17.96	2.06	9.72	14.42	12.82	284.85	176.32	530.97
S11	2.17	5.73	0.90	5.52	8.93	4.84	104.54	42.22	180.38
S12	2.19	5.55	0.94	5.55	8.25	4.67	107.01	58.36	198.06
S13	2.57	7.92	1.41	6.96	9.46	5.78	159.59	76.89	277.55
Average	2.61	10.32	1.55	7.74	10.95	7.33	219.06	80.18	347.50