International Journal of Marine Science 2015, Vol.5, No.29, 1-7
6
Table 2 Thermodynamic functions for adsorption of
Cu
(II)
, Pb
(II) ions
ion
Co
(mg/l)
K
- ΔG
ΔH
ΔS
Temperature
283
298
310.5
323
283
298
310.5
323
Cu(II)
10
76.51
115.27
135.98
231.55
9.87
11.44
12.75
19.84
14.07
0.10
20
56.80
79.64
134.13
201.02
9.24
11.03
12.52
24.43
14.01
0.12
30
12.00
29.12
81.19
142.54
5.48
8.33
10.70
48.29
13.08
0.19
40
4.40
6.22
22.68
56.55
2.77
5.58
7.91
50.14
10.25
0.18
50
1.86
2.22
4.04
4.07
1.12
2.06
2.85
16.71
3.64
0.06
Pb(II)
50
18.44
37.91
57.34
115.82
6.58
8.73
10.51
33.88
12.30
0.14
100
11.96
14.55
20.21
28.17
5.44
6.59
7.56
16.34
8.52
0.07
200
4.01
5.96
10.11
21.22
2.84
4.64
6.14
31.11
7.64
0.12
300
2.25
2.70
3.57
5.14
1.50
2.40
3.15
15.48
3.90
0.06
400
1.18
1.38
1.511
1.85
0.40
0.80
1.06
8.07
1.65
0.03
isotherm model. The maximum percentage removal of
68.96% and 97.43% for Cu(II) and Pb(II) occurred at
pH 6.5 and 25
°
C. It can be concluded that porcellanite
powder is a promising low lost and high efficiency
adsorbent for Cu(II) and Pb(II) removal from waste
water and can be applied in a magnetically assisted
water treatment technology.
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