Document Type : Original Research Paper
Authors
1
Environmental Management and Crop Production Unit, College of Agriculture, Engineering and Science, Bowen University, Iwo, Nigeria
2
Environmental Management and Crop Production, College of Agriculture, Engineering and Science, Bowen University, Iwo, Nigeria
10.22059/poll.2025.381355.2521
Abstract
Anthropogenic activities such as mining, quarrying, and industrial operations significantly contribute to environmental contamination by releasing organic and inorganic pollutants. This study examines heavy metal accumulation in plants near three quarry sites in Osun State, Nigeria: Sanlong Quarry (Obaagun), Wolid Quarry (Iwoye), and Jolokun Quarry (Modakeke). Heavy metals analysed include Cadmium (Cd), Arsenic (As), Lead (Pb), Chromium (Cr), Nickel (Ni), Copper (Cu), and Zinc (Zn). Plant leaves were sampled at distances of 0, 15, 30, and 45 metres from quarry sites, with control samples taken 150 metres away. Using Atomic Absorption Spectroscopy (AAS), the analysis revealed elevated levels of Cd, Pb, Cr, Ni, and Zn near all sites, exceeding WHO (1996) permissible limits, while As and Ni were within acceptable ranges. Sanlong Quarry samples showed high concentrations of Cu, Cd, Ni, and Pb, Wolid Quarry samples recorded elevated Zn levels, and Jolokun Quarry samples contained higher Ni and Cu levels. ANOVA results confirmed significant deviations from WHO standards, underscoring contamination risks. These findings raise concerns about environmental and food safety hazards linked to heavy metal accumulation in plants near quarry operations. Immediate mitigation measures are necessary to address these risks and protect environmental health and sustainability.
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