Evaluation of Selected Micronutrient and Heavy Metals among Quarry Workers in Ogun State, Nigeria

Background: Quarry workers are exposed to various occupational hazards, including heavy metals, which can impact their health. This study aimed to evaluate selected micronutrients and heavy metals in quarry workers in Ogun State, Nigeria, and assess potential health risks. Materials and Methods: This cross-sectional study was conducted between April and June 2018 at two quarry sites in Ogun State. Blood samples were collected from 60 quarry workers and 30 control subjects. Micronutrients (Copper, Zinc, Iron) and heavy metals (Chromium, Cadmium, Lead, Nickel) were measured using Atomic Absorption Spectrophotometry (AAS). Socio-demographic data and medical history were also recorded. Data were analyzed using SPSS (version 21.0), with t-tests, ANOVA, and Pearson correlation employed to evaluate relationships and group differences. A p-value < 0.05 was considered statistically significant. Results: The mean age of the participants was 30.8 ± 7.4 years, with 88.3% being male. Levels of serum Chromium (p = 0.038) and Cadmium (p = 0.025) were significantly different between quarry workers and controls. Heavy metal levels were also evaluated based on the length of exposure, with significant differences observed for Lead and Nickel. Micronutrient levels, such as Iron and Zinc, showed no significant variation across groups, although differences were noted based on years of work experience.