ANALYSIS OF HYDROCARBON LEVEL IN KOFAR RUWA AUTOMOBILE MECHANIC VILLAGE SOIL

Abstract

This study investigated the level and distribution of hydrocarbon-related pollutants in soil samples collected from Kofar Ruwa Automobile Mechanic Village, Kano. Five soil samples were analyzed using Gas Chromatography–Mass Spectrometry (GC-MS) to determine the types and classes of organic contaminants present. The results revealed a total of ninety-nine (99) organic compounds classified into alkanes, phthalates, esters, solvents, polycyclic aromatic hydrocarbons (PAHs), and other organic compounds. Alkanes and phthalates were the dominant pollutants, indicating significant contamination from used engine oil, lubricants, fuels, plastics, and vehicle repair activities. Only one PAH (anthracene) was detected, suggesting limited inputs from combustion-related sources. The presence of chemical makers such as hopanes further confirmed contamination by petroleum products. Pollution indices including Total Hydrocarbon Index (THI), Total Petroleum Hydrocarbon Index (TPHI), Organic Pollution Index (OPI), and Pollution Class Index (PCI) showed elevated contamination across all sampling sites.  The study concludes that soils within the Kofar Ruwa mechanic zone are significantly impacted by mixed hydrocarbon pollution, posing potential risks to soil quality, groundwater, and human health. The findings highlight the need for environmental regulation, waste-oil management, and remediation interventions within the mechanic village.