Table 7 Air quality concentration during the raining season
From: Environmental impact of quarrying on air quality in Ebonyi state, Nigeria
Location | Sulphur dioxide (µg/m3) | Chlorine (µg/m3) | Volatile organic compound (µg/m3) | Ammonia (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 | 40.00 | 50.23 | 41.19 | 20.87 | 29.60 | 22.10 | 18.53 | 23.19 | 15.44 | 23.54 | 54.11 | 31.00 |
Umuoghara | 39.21 | 49.12 | 40.30 | 22.23 | 30.20 | 23.14 | 19.00 | 26.80 | 17.13 | 27.80 | 53.32 | 32.07 |
Ngbo | 40.13 | 54.00 | 42.40 | 21.79 | 31.00 | 24.10 | 21.20 | 29.14 | 19.10 | 29.29 | 66.32 | 34.23 |
Control | 2.99 | 4.50 | 2.60 | 5.77 | 6.00 | 5.77 | 5.10 | 5.89 | 4.13 | 09.45 | 10.00 | 09.77 |
Mean | 31.58 | 39.46 | 30.62 | 18.78 | 24.20 | 18.78 | 15.96 | 21.26 | 13.95 | 22.52 | 45.94 | 26.77 |
S. Error | 1.99 | 3.01 | 2.10 | 1.11 | 2.00 | 2.40 | 0.01 | 0.02 | 0.01 | 0.03 | 0.01 | 0.02 |
F-LSD (p < 0.05) | 4.02 | 3.10 | 3.99 | 4.00 | 5.01 | 5.08 | 2.77 | 2.60 | 3.01 | 2.07 | 2.12 | 2.93 |
WHO (2021) | 100 | 10 | 20 | 1000 | ||||||||