Table 3 Air quality concentration during the dry 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 | 365.09 | 380.20 | 360.00 | 23.45 | 26.70 | 19.10 | 62.01 | 65.10 | 60.40 | 1500 | 1900 | 1750 |
Umuoghara | 700.13 | 710.12 | 650.07 | 45.26 | 49.87 | 41.82 | 80.01 | 82.25 | 75.50 | 2400 | 2750 | 2600 |
Ngbo | 830.10 | 860.30 | 800.12 | 18.36 | 20.97 | 15.60 | 92.10 | 96.01 | 90.60 | 3700 | 3950 | 3850 |
Control | 8.10 | 8.97 | 5.79 | 4.24 | 4.28 | 3.18 | 6.01 | 6.02 | 5.28 | 30 | 31 | 31 |
Mean | 475.85 | 489.89 | 453.99 | 22.83 | 25.46 | 19.93 | 60.03 | 61.35 | 58.02 | 1907.5 | 2157.8 | 2057.8 |
S. Error | 2.10 | 1.59 | 2.09 | 1.44 | 1.79 | 1.37 | 0.01 | 0.01 | 0.02 | 0.01 | 0.02 | 0.02 |
F-LSD (p < 0.05) | 3.53 | 4.08 | 4.69 | 4.02 | 5.19 | 6.57 | 0.01 | 0.01 | 0.02 | 0.09 | 0.10 | 0.12 |
WHO (2021) | 45 | 10 | 20 | 1000 | ||||||||