Batch adsorption using C. aurantiifolia peel as bio-adsorbent for the treatment of heavy metals in produced water

Authors

  • Nnaemeka Uwaezuoke Department of Petroleum Engineering, Federal University of Technology, Owerri, Nigeria Author https://orcid.org/0000-0002-4729-4072
  • Emmanuel Ojecho Department of Petroleum Engineering, Federal University of Technology, Owerri, Nigeria Author
  • Onyebuchi Ivan Nwanwe Department of Petroleum Engineering, Federal University of Technology, Owerri, Nigeria Author
  • Stanley Ibuchi Onwukwe Department of Petroleum Engineering, Federal University of Technology, Owerri, Nigeria Author

DOI:

https://doi.org/10.62638/ZasMat1280

Abstract

Produced water from subsurface reservoirs exists together with oil, and often consists of other impurities and heavy metals which can cause harm. Most produced water treatment techniques are ineffective in reducing impurities and concentration of metals. This causes difficulty in achieving disposal levels. The effectiveness of local material for produced water treatment for a Niger Delta oilfield is presented. The Citrus aurantiifolia peels were washed with distilled water and sun-dried for 48 hours. Additional dry heating in the oven at 150°C for 30 minutes was carried out. The peels were milled into a fine powdery form, washed with 0.5M sulphuric acid, filtered, and rinsed with distilled water. Samples were analyzed for heavy metals using an Atomic Absorption Spectrophotometer (AAS). The samples were treated with the bio-adsorbent on the magnetic stirrer in which various adsorption tests were carried out at different time intervals to obtain the optimum desired results for the removal of the metals. Their concentrations were reduced after the treatments. The percentage of adsorption of Pb, Ni, Cd, Cu, Fe, Mg, Cr, Zn, and Mn were 80.49%, 75.00%, 97.45%, 97.98%, 94.62%, 97.65%, 85.92%, 82.05%, and 97.17%, respectively. The Citrus aurantiifolia peels exhibited potential as adsorbent for heavy metals treatment in produced water.

Keywords:

heavy metals, produced water, Citrus aurantiifolia peel, bio-adsorbent

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Published

02-09-2025

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Research Paper