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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