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Effectiveness of coconut shell activated carbon for the treatment of produced water to meet DPR standards for disposal

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Author Affiliations

  • 1Gramen Petroserve Nigeria Limited, Port Harcourt, Nigeria
  • 2Department of Petroleum Engineering, University of Benin, Benin City, Nigeria

Res.J.chem.sci., Volume 12, Issue (3), Pages 5-14, October,18 (2022)

Abstract

Produced water is a complex inorganic and organic mixture of compounds1. It is also the main waste produced in oil and gas recovery operations2. This investigation will address the issue of pollution caused by produced water disposal into the environment, by treating produced water with Coconut shell activated carbon using the adsorption principle, to ensure produced water meet Department of Petroleum Resources (DPR) standards for disposal in the Niger Delta. Physio-chemical test were carried out on a produced water sample. Results obtained showed that the produced water sample is toxic, and can pose serious human health hazards and contaminate the environment if disposed off. Remedial treatment was offered to the produced water sample using Coconut shell activated carbon, and significant improvements were noticed as compared with the standards of Department of Petroleum Resources (DPR) for disposal of produced water in the Niger Delta. The produced water temperature was reduced from 29.7oC to 28oC, the pH of the sample was acidic with pH of 6.61 prior to treatment improved to 7.90. The amount of Oil and Grease diminished from 64mg/L to 12mg/L for 5ml of untreated and treated produced water respectively, Turbidity also experienced significant improvement, it was reduced from 103.5 NTU to 06.0 NTU. Total Dissolved Solids (TDS) was reduced from 0514ppm to 0483ppm, while Total Suspended Solids (TSS) was reduced from 0.03g to 0.02g, appreciable reduction was also noticed for the Chemical Oxygen Demand (COD), as it was reduced from 327.9mg/L to 156.6mg/L, as well as the Biochemical Oxygen Demand (BOD) which dropped from 80mg/L to 68.47 mg/L. Improvements were observed from the results obtained for the heavy metals.

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