Annexe 4-5
Résultats de l’étude thermodynamique
Tableau 12 : Résultats de calcul des paramètres thermodynamiques standards relatives à
l’adsorption du Pb
2+
, Cu
2
, Ni
2+
, Zn
2+
et Cd
2+
sur les fibres mortes de Posidonie.
C 0
ΔH° (kJ/mol)
ΔS° (J/molK)
ΔG° (kJ/mol)
20°C
30°C
40°C
Pb
2+
50
18422,161
79,888
-5034,144
-5716,905
-6637,122
75
37337,343
142,053
-4488,124
-5334,643
-7354,995
100
22294,822
88,968
-3695,747
-4866,888
-5462,417
120
18205,166
71,327
-2856,895
-3092,785
-4304,913
140
27589,178
102,645
-2523,295
-3475,019
-4579,464
180
10741,688
42,993
-1842,904
-2331,654
-2700,128
200
12741,205
48,174
-1396,792
-1828,121
-2362,538
250
4827,607
17,213
-237,515
-350,230
-584,461
Cu
2+
50
31382,024
114,750
-2308,882
-3293,848
-4611,215
75
34385,041
126,132
-2569,003
-3897,190
-5088,633
100
30234,692
110,884
-2372,146
-3166,680
-4604,017
120
21672,104
80,015
-1896,474
-2345,878
-3512,543
140
17802,768
65,584
-1446,396
-2028,706
-2761,381
180
12022,044
43,540
-768,540
-1119,968
-1643,110
200
9123,784
32,784
-491,718
-803,487
-1148,108
250
6992,407
22,928
277,753
28,377
-179,887
Ni
2+
50
24131,385
88,336
-1784,939
-2601,225
-3554,640
75
22158,473
81,504
-1802,657
-2402,495
-3442,410
100
21675,429
77,657
-1132,036
-1777,038
-2691,091
120
13874,403
50,044
-798,007
-1291,303
-1799,208
140
15205,475
53,616
-539,593
-989,390
-1615,802
180
7354,149
25,018
24,939
-239,567
-474,761
200
5013,508
16,393
197,743
66,251
-131,563
250
4970,359
14,569
701,965
548,179
410,942
Zn
2+
50
25116,594
88,910
-985,620
-1759,622
-2769,076
75
7368,864
26,947
-575,564
-703,856
-1120,848
100
9850,427
34,706
-339,830
-635,911
-1036,237
120
7997,985
27,935
-177,692
-499,524
-734,489
140
8774,596
29,633
75,086
-182,645
-519,308
180
4433,274
13,463
484,145
357,431
214,532
200
5610,703
16,631
728,035
584,585
394,384
250
4152,095
9,934
1242,006
1136,723
1043,608
Cd
2+
50
27838,598
95,819
-183,695
-1349,932
-2090,649
75
15288,615
50,906
330,682
-69,889
-692,309
100
15232,911
51,493
107,436
-312,167
-926,706
120
10560,443
35,418
188,651
-201,227
-518,106
140
11415,953
36,746
582,317
407,152
-161,257
180
9861,235
29,826
1050,979
962,774
445,015
200
6407,267
18,019
1106,545
984,104
743,563
250
4135,716
7,542
1923,919
1850,654
1772,970
Résultats de l’étude thermodynamique
Tableau 12 : Résultats de calcul des paramètres thermodynamiques standards relatives à
l’adsorption du Pb
2+
, Cu
2
, Ni
2+
, Zn
2+
et Cd
2+
sur les fibres mortes de Posidonie.
C 0
ΔH° (kJ/mol)
ΔS° (J/molK)
ΔG° (kJ/mol)
20°C
30°C
40°C
Pb
2+
50
18422,161
79,888
-5034,144
-5716,905
-6637,122
75
37337,343
142,053
-4488,124
-5334,643
-7354,995
100
22294,822
88,968
-3695,747
-4866,888
-5462,417
120
18205,166
71,327
-2856,895
-3092,785
-4304,913
140
27589,178
102,645
-2523,295
-3475,019
-4579,464
180
10741,688
42,993
-1842,904
-2331,654
-2700,128
200
12741,205
48,174
-1396,792
-1828,121
-2362,538
250
4827,607
17,213
-237,515
-350,230
-584,461
Cu
2+
50
31382,024
114,750
-2308,882
-3293,848
-4611,215
75
34385,041
126,132
-2569,003
-3897,190
-5088,633
100
30234,692
110,884
-2372,146
-3166,680
-4604,017
120
21672,104
80,015
-1896,474
-2345,878
-3512,543
140
17802,768
65,584
-1446,396
-2028,706
-2761,381
180
12022,044
43,540
-768,540
-1119,968
-1643,110
200
9123,784
32,784
-491,718
-803,487
-1148,108
250
6992,407
22,928
277,753
28,377
-179,887
Ni
2+
50
24131,385
88,336
-1784,939
-2601,225
-3554,640
75
22158,473
81,504
-1802,657
-2402,495
-3442,410
100
21675,429
77,657
-1132,036
-1777,038
-2691,091
120
13874,403
50,044
-798,007
-1291,303
-1799,208
140
15205,475
53,616
-539,593
-989,390
-1615,802
180
7354,149
25,018
24,939
-239,567
-474,761
200
5013,508
16,393
197,743
66,251
-131,563
250
4970,359
14,569
701,965
548,179
410,942
Zn
2+
50
25116,594
88,910
-985,620
-1759,622
-2769,076
75
7368,864
26,947
-575,564
-703,856
-1120,848
100
9850,427
34,706
-339,830
-635,911
-1036,237
120
7997,985
27,935
-177,692
-499,524
-734,489
140
8774,596
29,633
75,086
-182,645
-519,308
180
4433,274
13,463
484,145
357,431
214,532
200
5610,703
16,631
728,035
584,585
394,384
250
4152,095
9,934
1242,006
1136,723
1043,608
Cd
2+
50
27838,598
95,819
-183,695
-1349,932
-2090,649
75
15288,615
50,906
330,682
-69,889
-692,309
100
15232,911
51,493
107,436
-312,167
-926,706
120
10560,443
35,418
188,651
-201,227
-518,106
140
11415,953
36,746
582,317
407,152
-161,257
180
9861,235
29,826
1050,979
962,774
445,015
200
6407,267
18,019
1106,545
984,104
743,563
250
4135,716
7,542
1923,919
1850,654
1772,970