Microbiological and Physicochemical Characterization of Hospital Effluents before and after Treatment with Two Types of Sawdust

Table 3

Means concentration of heavy metals before and after treatment.

Metal	Standard	Raw	Red sawdust (RS)			Catia sawdust (CS)
			5 cm	9 cm	13 cm	5 cm	9 cm	13 cm
As	0.5	0.23	<0.01	<0.01	<0.01	<0.01	<0.01	<0.01
Cd	0.2	0.02	<0.01	0.147	<0.01	<0.01	<0.147	<0.01
Cu	3	0.698	0.352	0.138	0.0284	0.352	0.138	0.028
Pb	1	0.14	<0.01	<0.01	<0.164	<0.01	<0.01	<0.164
Cr	0.5	0.26	<0.01	<0.01	<0.01	<0.01	<0.01	<0.01