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

Table 3

The levels of heavy metals in surface sediments from TGR tributaries and other rivers in China.

Location	Chemical element								Reference
	Cr	Cu	Zn	Ni	As	Pb	Cd	Hg
TGR
Max.	99.92	95.18	238.73	57.24	16.65	69.96	2.52	0.29	This study
Min.	65.93	25.07	66.92	29.72	9.14	21.21	0.33	0.06
Mean	79.73	46.67	104.28	41.67	12.26	38.11	0.71	0.13
Soil background values	61.0	22.6	74.2	26.9	11.2	26.0	0.097	0.065	[10]
Sediment background	82.0	35.0	78.0	33.0	9.6	27.0	0.3	0.08	[13]
Yangtze River (Wuhan)	87.82	51.64	140.27	40.91	15.85	45.18	1.53	0.15	[14]
Lower reach of Yangtze River	98.32	48.61	129.73	41.49	13.54	50.77	2.82	0.16	[15]
TEC	43.4	31.6	121.0	22.7	9.8	35.8	1.0	0.18	[16]
PEC	111.0	149.0	459.0	48.6	33.0	128.0	5.0	1.06	[16]