Table 6 Air quality concentration during the rainy season
From: Environmental impact of quarrying on air quality in Ebonyi state, Nigeria
Location | Particulate matter (µg/m3) | Nitrogen dioxide (µg/m3) | Hydrogen sulphide (µg/m3) | Carbon monoxide (µg/m3) | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Morning (6am) | Afternoon (12:00 pm) | Evening (6.00 pm) | Morning (6am) | Afternoon (12:00 pm) | Evening (6.00 pm) | Morning (6am) | Afternoon (12:00 pm) | Evening (6.00 pm) | Morning (6am) | Afternoon (12:00 pm) | Evening (6.00 pm) | |
Ishiagu | 280.10 | 286.00 | 282.11 | 17.00 | 21.56 | 24.01 | 40.15 | 43.70 | 38.18 | 843 | 887 | 790 |
Umuoghara | 580.70 | 620.07 | 601.20 | 28.20 | 33.62 | 36.23 | 57.20 | 59.52 | 52.07 | 1240 | 1290 | 1200 |
Ngbo | 632.00 | 680.22 | 640.34 | 11.25 | 12.77 | 15.45 | 64.75 | 69.24 | 61.10 | 2210 | 2900 | 2000 |
Control | 4.60 | 6.79 | 6.19 | 3.01 | 3.20 | 4.27 | 4.11 | 4.22 | 3.76 | 22 | 23 | 21 |
Mean | 382.46 | 398.27 | 374.35 | 14.87 | 17.79 | 19.99 | 41.55 | 44.17 | 38.78 | 1078.8 | 1275.0 | 1002.8 |
S. Error | 1.09 | 1.87 | 1.50 | 1.20 | 1.43 | 1.30 | 0.02 | 0.03 | 0.01 | 0.02 | 0.01 | 0.04 |
F-LSD (p < 0.05) | 2.35 | 3.81 | 3.91 | 3.21 | 4.20 | 5.77 | 0.02 | 0.01 | 0.02 | 0.06 | 0.08 | 0.10 |
WHO (2021) | 45 | 10 | 20 | 1000 | ||||||||