Table 3 Reduction rate (%) of 17 beta-estradiol by ultrasound at different time, power, pH and frequency (Mean ± SD)
From: Hormones removal from municipal wastewater using ultrasound
pH | Power (W) | Frequency (KHz) | Time (min) | |||
|---|---|---|---|---|---|---|
30 | 60 | 90 | 120 | |||
3 | 70 | 30 | 12.2 ± 1.8 | 12.5 ± 1.6 | 13.0 ± 1.1 | 13.1 ± 1.3 |
3 | 70 | 45 | 13.1 ± 1.2 | 13.2 ± 1.3 | 13.3 ± 1.2 | 13.7 ± 1.4 |
3 | 70 | 60 | 13.8 ± 1.1 | 14.5 ± 1.2 | 15.1 ± 1.2 | 15.8 ± 1.1 |
3 | 110 | 30 | 19.8 ± 1.3 | 21.0 ± 1.3 | 21.2 ± 1.2 | 21.6 ± 1.4 |
3 | 110 | 45 | 21.9 ± 1.3 | 22.3 ± 1.2 | 22.5 ± 1.4 | 23.1 ± 1.4 |
3 | 110 | 60 | 23.1 ± 1.4 | 23.5 ± 1.4 | 24.0 ± 1.3 | 24.1 ± 1.4 |
7 | 70 | 30 | 25.8 ± 1.6 | 26.4 ± 1.5 | 28.8 ± 1.5 | 30.8 ± 1.3 |
7 | 70 | 45 | 31.8 ± 1.2 | 32.1 ± 1.3 | 32.5 ± 1.2 | 34.5 ± 1.2 |
7 | 70 | 60 | 30.8 ± 1.3 | 32.5 ± 1.2 | 34.2 ± 1.4 | 37.5 ± 1.6 |
7 | 110 | 30 | 38.6 ± 1.3 | 39.8 ± 1.2 | 40.5 ± 1.2 | 41.8 ± 1.4 |
7 | 110 | 45 | 41.8 ± 1.3 | 42.9 ± 1.4 | 44.5 ± 1.3 | 45.8 ± 1.4 |
7 | 110 | 60 | 43.0 ± 1.2 | 45.6 ± 1.4 | 46.2 ± 1.3 | 48.2 ± 1.5 |
10 | 70 | 30 | 66.5 ± 2.3 | 67.8 ± 2.1 | 69.2 ± 2.2 | 70.8 ± 2.3 |
10 | 70 | 45 | 70.9 ± 2.4 | 72.3 ± 2.2 | 74.2 ± 2.3 | 75.5 ± 2.1 |
10 | 70 | 60 | 75.3 ± 2.2 | 75.9 ± 2.1 | 76.8 ± 2.3 | 78.5 ± 2.1 |
10 | 110 | 30 | 81.9 ± 2.4 | 82.3 ± 2.3 | 82.5 ± 2.8 | 83.9 ± 2.6 |
10 | 110 | 45 | 86.2 ± 2.5 | 86.9 ± 2.6 | 86.6 ± 2.8 | 88.9 ± 2.6 |
10 | 110 | 60 | 90.9 ± 2.4 | 91.3 ± 2.5 | 91.8 ± 2.3 | 93.6 ± 2.2 |