Bioavailability Studies of Metals in Surface Water of River Challawa, Nigeria

Table 2

Intermetal relationships in surface water across seasons.

Metals	Zn	Pb	Cu	Cr	Cd
	Warm and dry season
Zn	1.000
Pb	−0.020	1.000
Cu	0.100	0.070	1.000
Cr	0.312	0.400	0.407	1.000
Cd	−0.233	−0.200	−0.100	0.100	1.000
	Cool and dry season
Zn	1.000
Pb	−0.112	1.000
Cu	−0.298	0.416*	1.000
Cr	0.512*	0.123	−0.121	1.000
Cd	0.314	0.142	−0.344	0.298	1.000
	Hot and dry season
Zn	1.000
Pb	−0.109	1.000
Cu	−0.113	0.500*	1.000
Cr	−0.333	0.616*	0.414	1.000
Cd	0.102	−0.211	−0.512*	−0.314	1.000
	Warm and wet season
Zn	1.000
Pb	0.500*	1.000
Cu	0.109	0.522*	1.000
Cr	0.222	0.200	0.010	1.000
Cd	−0.100	0.100	−0.111	−0.126	1.000

Significantly at .