Abstract
The present study investigated the degradation of total petroleum hydrocarbons (TPH) in crude oil polluted water using sodium persulphate as a chemical oxidant. Laboratory-scale contaminations of water and degradation experiments using 0.1 M oxidant were carried out with contact time ranging from 1 to 15 days. The TPH extraction was carried out and analyzed using gas chromatography flame ionization detector (GC-FID) (Agilent 7890A). 72% of ETPH was degraded within 15 days from an initial concentration of ∼137 mg/L. Results indicated 99% efficiency in TPH degradation achieved within the first 10 days after initial contamination. Remediation technique on laboratory- and field-scale is promising and could potentially address major oil pollution contamination issues.
Highlights
Hydrocarbon contamination of soil and groundwater has been a recurring challenge globally, and in oil rich countries such as Nigeria
Total petroleum hydrocarbon (TPH) is a term used to define an extensive family of chemical compounds originating from crude oil
Enhanced natural attenuation, which has been largely employed for remediation of petroleum hydrocarbons in the Niger Delta region of Nigeria, has not been effective for degradation of heterocyclic and polycyclic aromatic hydrocarbons [2]
Summary
Hydrocarbon contamination of soil and groundwater has been a recurring challenge globally, and in oil rich countries such as Nigeria. Studies have reported occurrence of hydrocarbon-based contaminants in soil, sediment, water and biota in Nigeria, especially the Niger Delta [3 - 5]. Chemical oxidants such as persulphates and percarbonates hold promise for environmental remediation. 1378 (2019) 032050 doi:10.1088/1742-6596/1378/3/032050 chemical oxidants derives from their oxidation / reduction potential – measured in volts (V) or millivolts (mV), which measures their tendency to be reduced when they acquire electrons Per oxygens such as sodium persulphate (with standard redox potential of 2.1 V) can be activated for greater degradation efficiency by heat [7], UV, ultrasound, and electron beam to generate sulfate radicals [8,9,10]. The aim of this study was to determine the effect of sodium persulphate - a chemical oxidant, on the degradation of total petroleum hydrocarbons (TPH) in crude oil contaminated water
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