Levels of polycyclic aromatic hydrocarbons in leachates from unlined dumpsite of Agu-Awka Anambra state

ABSTRACT

Disposal of solid wastes in an unlined dumpsite is the most common waste disposal practice in Nigeria. Percolations of leachates containing polycyclic aromatic hydrocarbons (PAHs) from unlined dumpsites are known to cause environmental hazards which pose significant health risks to human lives. The collection of the leachates were done during the wet season for 4 months. The levels of PAHs concentration in the leachates were determined using gas chromatography. The health-related risks were determined using toxicity and mutagenic health risk assessment. Isomeric ratios were used to deduce possible origins of PAHs in the leachates. The mean values of the PAH levels ranged from 0.1 − 14.9 µg/L. The benzo (g,h,i) pyrene reported the maximum level of PAHs (14.9 µg/L) followed by anthracene (12.7 µg/L). The 3 – ring PAHs recorded the highest PAHs, while the 2- ring was the least dominant PAHs. The isomeric profile indicated mixed sources (pyrolytic and petrogenic) with a dominant petrogenic source observed. The benzo(a)pyrene toxicity and mutagenic quotients disclosed its ability to trigger cancer and non–cancer-related risks to a living organism.

KEYWORDS:

• PAHs
• unlined dumpsite
• leachate
• pollution
• Agu-Awka
• health risks

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No potential conflict of interest was reported by the author(s).

Correction Statement

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