Heavy Metals in Water and Sediment: A Case Study of Tembi River

Table 1

Variations of average of heavy metals concentration in Tembi River water in different seasons (mg/L).

Heavy metals	Sampling point	Sampling time
		Summer 2011	Autumn 2011	Winter 2011	Spring 2012
Cd	1	0.07±0.010	0.12±0.700	0.24±0.002	0.25±0.030
	2	0.1±0.006	0.26±0.010	0.30±0.010	0.35±0.050
Cr	1	0.13±0.010	0.29±0.005	0.16±0.010	0.17±0.010
	2	0.25±0.010	0.40±0.05	0.31±0.060	0.58±0.005
Cu	1	0.26±0.020	0.45±0.080	0.56±0.010	0.62±0.010
	2	0.40±0.01	0.54±0.050	0.63±0.010	0.71±0.010
Fe	1	0.24±0.010	0.18±0.010	0.82±0.040	1.1±0.005
	2	0.26±0.020	0.28±0.030	1.1±0.050	1.87±0.030
Mn	1	0.07±0.003	0.09±0.001	0.81±0.01	0.82±0.010
	2	1.00±0.007	1.25±0.030	1.40±0.020	0.91±0.020
Ni	1	0.16±0.01	0.40±0.050	0.52±0.010	0.83±0.02
	2	0.50±0.050	0.75±0.010	0.65±0.070	0.80±0.020
Pb	1	0.59±0.06	1.45±0.030	0.81±0.080	1.64±0.020
	2	1.80±0.070	0.85±0.070	1.02±0.010	1.91±0.030
Zn	1	0.12±0.000	0.23±0.005	0.34±0.000	0.11±0.000
	2	0.20±0.010	0.29±0.005	0.51±0.020	0.40±0.000

1: upstream; 2: downstream.