Abstract
Hydrocarbon reservoirs contain produced water as one of its constituents. Produced water most times contains toxic materials and other impurities that affect the ecosystem. Most of the available treatment techniques have not been very effective in reducing some of the contaminants to an acceptable disposal limits.Banana peels was washed with clean water, dried under the sun for three days, and oven-dried at 105±5o C for 3 hours. It was milled, sieved (150 and 300 microns,), and then treated with 0.4mol/L HNO3 , rinsed with clean water to remove any pigment that might interfere with the result. Sample (produced water) was treated in adsorption chamber for 4 hours using 150 micron size of adsorbent. Treatment was repeated with 300 micron size. Treated sample was analyzed and characterized. For the 150 micron size, the percentage reductions for the metals concentration (Pb, Ni, Cd, Cu, Fe, Mg, Cr, Zn, Mn, Ca, Ar, B, Sn, Ba) were found to be 87.18%, 23.08%, 42.86%, 100%, 80.12%, 34.33%, 28.93%, 45.40%, 47.89%, 97.18%, 33.06%, 43.24%, 62.50%, and 44.44% respectively. Similar reductions in same metals with 300 micron size were equally obtained. The finer adsorbent was more effective. Langmuir model best described the adsorption of lead with isotherm R2 of 0.98, while Freundlich described the adsorption of nickel and iron, with isotherms R2 of 0.85 and 0.93 respectively. Produced water from Niger Delta oil field was effectively treated of contaminants using banana peels with 150 micron size produced the best result.
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