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

Table 4

Analysis of correlation about heavy metals in surface sediments from TGR tributaries.

Element	Cr	Cu	Zn	Ni	As	Pb	Cd	Hg
Cr	1
Cu	0.922^a	1
Zn	0.960^a	0.924^a	1
Ni	0.333	0.546	0.462	1
As	0.823^a	0.853^a	0.846^a	0.282	1
Pb	0.040	0.281	0.189	0.948^a	0.030	1
Cd	0.926^a	0.907^a	0.990^b	0.519	0.848^a	0.256	1
Hg	0.625^b	0.735^a	0.727^a	0.737^a	0.562^b	0.559^b	0.785^a	1

aCorrelation is significant at the 0.01 level (2-tailed).
bCorrelation is significant at the 0.05 level (2-tailed).