Table 5 Isotherm parameters obtained from the fittings of experimental results on the adsorption of each pharmaceutical from the secondary effluent of a STP (STP-SE) or from ultrapure water (UP-W).
Pharmaceuticals
Diclofenac
Salicylic acid
Ibuprofen
Acetaminophen
STP-SE
UP-W
STP-SE
UP-W
STP-SE
UP-W
STP-SE
UP-W
Freundlich K F (mgg
1 (mgL 1 ) 1/ n )
3.07±0.31 2.32±0.14
3.70±0.36 2.41±1.40
0.50±0.04 1.62±0.04
0.90±0.05 1.97±0.05
2.55±0.29 2.76±0.22
4.91±0.29 4.36±0.31
2.86±0.38 2.73±0.27
3.95±0.31 3.66±0.28
n
R 2
0.9744
0.9805
0.9949
0.9954
0.9617
0.9534
0.9438
0.9720
1.10
1.18
0.19
0.17
0.731
0.77
1.07
0.73
S yx
Langmuir Q m (mg g K L (Lmg
1 ) 1 )
23.38 ± 1.28 0.058 ± 0.009
26.69 ± 1.53 0.060 ± 0.012
15.12 ± 1.06 0.013 ± 0.002
12.08 ± 1.99 0.025 ± 0.005
12.93 ± 0.45 0.098 ± 0.014
12.66 ± 0.30 0.359 ± 0.046
15.53 ± 0.71 0.077 ± 0.012
12.33 ± 0.65 0.265 ± 0.077
R 2
0.9714
0.9643
0.9875
0.9622
0.9739
0.9580
0.9721
0.9303
S yx
1.16
1.61
0.29
0.48
0.60
0.73
0.76
1.15
Sips Q m (mg g K LF (mgg
1 )
34.84 ± 8.44 0.069 ± 0.012 1.49±0.21
53.16 ± 22.62 0.062 ± 0.022 1.77±0.29
16.05 ± 2.30 0.118 ± 0.017 1.38±0.22
15.36 ± 1.05 0.372 ± 0.035 1.69±0.20
16.79 ± 2.25 0.092 ± 0.021 1.15±0.21
19.74 ± 4.55 0.230 ± 0.063 2.15 ± 0.379
1 (mgL 1 ) 1/ n )
n
R 2
0.9852
0.9845
0.9824
0.9851
0.9734
0.9846
0.88
1.10
0.52
0.45
0.77
0.57
S yx
Note: Each ± stands for standard deviation of three experimental replications.
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