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Table 2 Range and mean ± SD of pyrolysis and charcoal harvesting at settlements in Alabata, Ogun State

From: Air quality index from charcoal production sites, carboxyheamoglobin and lung function among occupationally exposed charcoal workers in South Western Nigeria

  Alabata (pyrolysis) Alabata (harvesting)
Oluwotiti Raka Ikugba Ayogun Adaako Raka Fojubaye
NO2 (ppm) mean ± SD 0.25 ± 0.47 0.20 ± 0.27 0.19 ± 0.22 0.48 ± 0.71 0.018 ± 0.025 0.031 ± 0.058 0.08 ± 1.35
SO2 (ppm) mean ± SD 1.89 ± 2.77 1.74 ± 2.19 2.85 ± 1.83 2.93 ± 3.21 0.0075 ± 0.011 0.012 ± 0.016 0.02 ± 0.05
CO (ppm) mean ± SD 280 ± 149 96.8 ± 57.1 585 ± 163 2.93 ± 3.21 1.50 ± 2.05 14.65 ± 5.31 13.4 ± 6.46
CO2 (ppm) mean ± SD 1986 ± 1648 964 ± 819 3877 ± 2608 3021 ± 1958 221 ± 27 317 ± 147 714 ± 673
PM2.5 (µg/m3) mean ± SD 17,000 ± 270,000 6550 ± 7520 34,000 ± 17,000 18,000 ± 9000 430 ± 110 279 ± 230 103 ± 191