Effect of Sawmill Effluent on the Physicochemical Parameters and Heavy Metals Of Imo River, Arigidi Akoko, Ondo State.

Résumé

This research work aimed at the determination of the effect of sawmill effluent on the physiochemical parameters and microbial parameters of Imo River of Arigidi town in Ondo state. Water samples were collected for two months (June and July 2019) at a river that runs behind a sawmill. Point 1 is the upstream (U1 and 2) some meters before point 2, Point 2 is the effluent (E1 and 2), the point at which the sawmill wastes discharge into the water, and Point 3 which is the downstream (D1 and 2) some meters after the effluent. The samples taken were analyzed using standard methods to determine the effects of the wastes on the physicochemical parameters (temperature, PH, dissolved oxygen, salinity, conductivity, total solids, total dissolved solids, total suspended solids, turbidity, phosphate, sulfate, nitrate, heavy metals parameters (lead, cobalt, zinc, and copper). All the physicochemical parameters except salinity are significantly different (p<0.05). Some of the physiochemical parameters such as; ph, turbidity, total dissolved solids, conductivity increase at the effluent due to the effect of the volume of sawmill wastes being discharged into the river. The discharge of sawmill wastes into the river has negative effects on the water quality