Investigation of hydrocarbon contaminant levels and groundwater quality assessment in parts of bonny island, rivers state of Nigeria

Document Type: Research paper

Authors

Department of Geology, Faculty of Science, University of Port Harcourt, Nigeria

Abstract

This study investigates the environmental impact of a recent oil spill incident in the Bonny terminal using groundwater media. The objective was to establish the presence of Contaminants of Concern (COC), determine, quantify and model spilled volumeIEEE Transactions on Components, Packaging, and Manufacturing Technology and ascertain potential health risks associated with the spill incident. The COC included Total Petroleum Hydrocarbons (TPH), Polyaromatic Hydrocarbons (PAH), and BTEX compounds. Groundwater was sampled in the vicinity of the spill incidents and further away into the surrounding communities. Groundwater assessment showed that TPH ranges from 9.04 to 20,600 µg/L with a mean value of 2526.90 ± 6392.40 µg/L. Apart from four boreholes, all others had TPH values exceeding the DPR target value of 50 µg/L. PAH was recorded only at three boreholes, with values: 0.13, 1.07, and 0.25 µg/L, respectively. Meanwhile, BTEX compounds had concentration (5910 µg/L) that exceeded the Directorate of Petroleum Resources (DPR) target value of 0.8 µg/L over 7000 times. The BW-3 is most deteriorated in water quality. These contaminated borehole-sampling locations are positioned at the vicinity of the tank farm, at higher hydraulic heads and hence, might not pose much health risk to the surrounding communities. Groundwater movement in the area is towards the Bonny River in the southwestern part of the area. This study, therefore recommends remedial actions be taken immediately to prevent health risks in the tank farm area.
 

Graphical Abstract

Investigation of hydrocarbon contaminant levels and groundwater quality assessment in parts of bonny island, rivers state of Nigeria

Highlights

  • The Niger Delta region has been rated as the most oil-impacted and polluted environment globally.
  • Pollution caused by petroleum hydrocarbons is one of the most common environmental issues in the study area.
  • The aim of the research is to assess groundwater quality around an oil spill site in Bonny, Rivers State.
  • Government and relevant stakeholders should urgently take proactive steps to protect groundwater resources.
 

Keywords

Main Subjects


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Volume 1, Issue 1
January and February 2020
Pages 61-70
  • Receive Date: 06 September 2019
  • Revise Date: 15 November 2019
  • Accept Date: 30 November 2019