Abstract:
This study was aimed at assessing effects of effluents from Burie Soft Drinks Factory on Water
Quality of Manzena River. The mean results indicated that some measured physicochemical
parameter values in some sample sites were above the recommended permissible limit of WHO.
The most impacted sites (ED, DS1) registered high values of pH, conductivity, TDS, Turbidity
and CaCO3 indicating poor water quality. At the effluent joins the river ED and DS1 some
physicochemical parameters do not fulfill the guide lines provided by WHO. The range values of
physicochemical parameters (temperature, pH, EC, TDS and sulfate in the wastewater 20.2-23
, 7.48-8.6, 460-1590 μs/cm, 294-1017 mg/L and 1.8-4.8 mg/L were recorded respectively, and
values were in the wastewater above the recommended permissible limit set by WHO. The
experimental values of turbidity, nitrate, nitrite, ammonia, calcium carbonate and magnesium ion
1.28-155, 6.7-9.2, 1.4-2.5, 1.3-2.27, 2.1-353 and 0.2-59 mg/L respectively were obtained, and
the values were below the recommended permissible limit set by WHO
The heavy metal results obtained from this study showed that the overall concentrations of heavy
metals Pb, Zn, Fe, Cu, Cr, Cd, and Mn in the ranged 0.411-1.405, 0.371-0.405, 1.34-2.738,
0.076-0.125, 0.128-0.133, BDL, and 0.089-0.105 mg/L respectively. The concentrations of those
heavy metals (Zn, Fe, Cu, Cd, and Mn) in the wastewater were below the recommended limit of
WHO and the concentrations of Pb and Cr were above the permissible limit of WHO. The
method validation result range of LOD and LOQ were 0.002-0.009 and 0.0028-0.030
respectively, and the validation result range of RSD and Accuracy at sample location of US1
(0.107-1.618, 98.617-121.213), at sample location of ED (0.684-2.351, 95.467-122.55) and
sample location of DS1 (0.413-2.485, 95.200-117.258) respectively. Hence attention and
treatment should be given to tackle the pollution of the river for those parameter levels that were
above the permissible limits of WHO.
