Environmental Monitoring of Air Pollutants in the Vicinity of Major Granite Mining and Processing Sites in Abuja, Nigeria
Kenneth Ayegba
Joseph Sarwuan Tarka University, Makurdi, Benue StateAlexander Aondongu Tyovenda
Joseph Sarwuan Tarka University, Makurdi, Benue StateMoses Owoicho Audu
Joseph Sarwuan Tarka University, Makurdi, Benue StateAbstract
This study assessed air quality in the vicinity of two major granite mining and processing sites in Abuja, Nigeria, focusing on particulate matter (PM1.0, PM2.5, PM10) and gaseous pollutants (CO, HCHO, TVOC). Measurements were conducted at three points – processing area, staff premises, and entrance/exit – during dry and rainy seasons using calibrated air quality detectors. Data were analyzed for temporal trends and compliance with National Ambient Air Quality Standards (NAAQS, US EPA) and National Environmental Standards and Regulations Enforcement Agency (NESREA) limits. Results revealed that particulate matter concentrations were consistently higher at processing points compared to other locations, with PM1.0 and PM2.5 exceeding regulatory limits for 24-hour averages in both seasons. Gaseous pollutants were generally low and within permissible limits, though CO showed elevated variability at staff premises and entrance/exit points, likely due to vehicular and equipment emissions. Seasonal comparison indicated higher pollutant levels during the dry season, attributed to intensified quarry activities and reduced atmospheric dispersion. Autocorrelation analysis using ARIMA modelling showed no significant trends between measured and modelled concentrations, suggesting random variability rather than systematic patterns. Although gaseous pollutants were below threshold values, their presence alongside elevated particulate matter underscores cumulative health risks for workers and nearby communities. Continuous monitoring and implementation of dust suppression and emission control strategies are recommended to mitigate occupational and environmental exposure.
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Joseph Sarwuan Tarka University, Makurdi, Benue State
Joseph Sarwuan Tarka University, Makurdi, Benue State
Joseph Sarwuan Tarka University, Makurdi, Benue State
