The physicochemical parameters and heavy metals in produced water effluent and receiving Ugborodo river in Escravos of the Niger Delta was evaluated. The sampling technique applied was purposive which was designed in descriptive statistical manner involving means and standard deviations, to ensure that all the parameters analysed were effectively recorded and presented accurately. Samples were collected at three points namely: produced water effluent at point of discharge, and Upstream and Downstream of the receiving river for comparisons. Findings revealed that pH (7.37), temperature (31ºC), total suspended solids (36mg/l) and biochemical oxygen demand (152mg/l) are within the permissible limit as regulated by Department of Petroleum Resources (DPR). The corresponding results of the upstream and downstream samples are also in line and therefore no considerable environmental concern to the ecosystem. However, salinity (9396mg/l), turbidity (50NTU), total dissolved solids (11409mg/l), chemical oxygen demand (215mg/l) and total hydrocarbon content (35mg/l) analyses results indicate slightly higher values than the permissible limits. These higher values could lead to environmental concerns over time; therefore, it is recommended that further treatment of the produced water to meet regulatory standards is necessary before discharging to the environment. There is therefore the need to improve treatment facilities, procedures, enforcing compliance and strict supervision to meet standards before discharging of produced water effluent into the environment. In conclusion, this study has created the awareness of the possible environmental impact that may arise from the continuous discharge of produced water effluent that is less than adequate in treatment and management into the Ugborodo river in Escravos, Delta State in the Niger delta.
physicochemical, effluent, discharge, exploitation, environmental, produced-water
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