Journal :   Asian Journal of Research in Chemistry

Volume No. :   5

Issue No. :  3

Year :  2012

Pages :   425-432

ISSN Print :  0974-4169

ISSN Online :  0974-4150


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Physicochemical Quality of an Oilfield Wastewater in Nigeria

Address:   *1S. A. Wemedo, 1O. Obire and 2 K. O. Orubite
1Department of Applied and Environmental Biology,
2Department of Chemistry, Rivers State University of Science and Technology, Nkpolu-Oroworukwo, P. M. B. 5080,Port Harcourt, Rivers State, Nigeria.
*Corresponding Author

Evaluation of physicochemical properties of oilfield wastewater of Obagi oilfield location was carried out for 5-month period. Freshly-produced oilfield wastewater samples were analyzed using standard procedures. Mean data for the physicochemical parameters were heavy metals: chromium 0.0445ppm, zinc <0.2098ppm, nickel <0.0173ppm, copper 0.0182ppm and lead 0.1344ppm; pH 8.0±0.2, temperature 33.8±0.4ºC, electrical conductivity 15±1?$cm-1, turbidity 210±7FTU, total dissolved solids 7.2±1g l-l, total hydrocarbon content 59±3ppm, calcium 75±3mg l-l, magnesium 39±1mg l-l, iron 0.9±1mg l-l, sulphate 2.4±4mg l-l, nitrate 1.2±1mg l-l, carbonate 177±5mg l-l, bicarbonate 3303±3mg l-l, salinity 6511±8mg l-l, dissolved oxygen 3.9±1mg l-l, and biological oxygen demand 2.0±1mg l-l. The study revealed that the oilfield wastewater contains inorganic constituents and hydrocarbon components. Monthly and seasonal variations in physicochemical parameters observed during the study were statistically significant in some parameters and insignificant in other parameters. Values obtained for the various parameters were affirmed to be normal for the oilfield wastewater under study; and the values were within the permissible limits allowed for effluent/wastewater before discharge. Hence, on discharge, the oilfield wastewater may not cause any ecotoxicological problem in the environment.
Evaluation, properties, Obagi, location, freshly-produced.
S. A. Wemedo, O. Obire, K. O. Orubite. Physicochemical Quality of an Oilfield Wastewater in Nigeria. Asian J. Research Chem. 5(3): March 2012; Page 425-432.
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