EFFECTS OF REFINERY EFFLUENT ON THE PHYSICO-CHEMICAL PARAMETERS OF STREAM WATER
AbstractManaging oil and gas industrial environment requires constant monitoring of the effluent discharges from such industries. The essence of such monitoring is to ascertain the level of compliance of such industries with the pollution control guidelines set by regulating agencies.
In this work, the effects of refinery effluent discharge on the physico-chemical parameters of the stream water has been studied, using treated effluent water discharged from the Port Harcourt Refinery into the Ekerekana Creek in Okrika as reference. Samples were collected at the discharge point into the Creek and subsequently at 500 metres and 1000 metres down stream.
The samples were analysed for physico-chemical parameters such as pH, TDS, TSS, COD, Oil and Grease, Temperature, Cations (Pb2+, Fe (total), Cu2+ , Cr6+, Ca2+, and Mg2+) and Anions (PO3-4, NO-3, SO2-4 and Cl - ) . The results showed that Oil and Grease, COD, Cations (Pb2+, Fe (total)) and temperature were affected by dilution, and are stated as follows: oil and grease, 24 to 7mg/l; Iron (Fe (total)), 1.0 to 0.16 mg/l; lead (Pb2+), 0.035 to 0.006 mg/l; COD, 7 to 1mg/l and temperature, 24.1 to 22.0oC.
Keywords: Effluent water, Concentration, Dilution, Physico-chemical parameter, Pollutant.
[Global Jnl Engineering Res. Vol.1(1) 2002: 51-58]