Lampiran 7 Penentuan pH optimum bentonit alam Adsorpsi
pH Massa g Absorbans
C akhir mgL
Q mgg
E
CrIII 2
0.5038 0.293
196.86 1.56
1.57 3
0.5044 0.292
196.23 1.87
1.89 4
0.5037 0.290
194.98 2.49
2.51 5
0.5024 0.288
193.73 3.12
3.14
6 0.5076
0.285 191.85
4.01 4.08
7 0.5063
0.287 193.10
3.41 3.45
CrVI 1
0.5058 0.369
195.12 2.41
2.44 2
0.5018 0.366
193.58 3.20
3.21 3
0.5064 0.362
191.52 4.19
4.24
4 0.5073
0.36 190.50
4.68 4.75
5 0.5071
0.361 191.01
4.43 4.50
6 0.5070
0.368 194.61
2.66 2.69
7 0.5004
0.371 196.15
1.92 1.93
Lampiran 8 Penentuan pH optimum Na-bentonit Adsorpsi
pH Massa
g Absorbans
C akhir mgL
Q mgg E
CrIII 1
0.5032 0.294
197.49 1.25
1.26 2
0.5019 0.292
196.24 1.87
1.88 3
0.5008 0.286
192.48 3.75
3.76 4
0.5011 0.282
189.97 5.00
5.02 5
0.5041 0.278
187.46 6.22
6.27
6 0.5027
0.276 186.21
6.86 6.90
7 0.5014
0.281 189.34
5.32 5.33
CrVI 1
0.5051 0.368
194.61 2.67
2.69 2
0.5016 0.366
193.58 3.20
3.21 3
0.5038 0.362
191.53 4.20
4.24
4 0.5009
0.358 189.47
5.26 5.27
5 0.5035
0.363 192.04
3.95 3.98
6 0.5023
0.365 193.07
3.45 3.47
7 0.5033
0.369 195.12
2.42 2.44
Lampiran 9 Penentuan pH optimum bentonit termodifikasi oksida besi Adsorpsi
pH Massa
g Absorbans
C akhir mgL
Q mgg E
CrIII 1
0.5005 0.289
194.35 2.82
2.83 2
0.5016 0.281
189.34 5.31
5.33 3
0.5050 0.278
187.46 6.21
6.27 4
0.5008 0.278
187.46 6.26
6.27
5 0.5033
0.271 183.07
8.41 8.47
6 0.5018
0.279 188.09
5.93 5.96
7 0.5008
0.281 189.34
5.32 5.33
CrVI 1
0.5041 0.362
191.53 4.20
4.24 2
0.5023 0.358
189.47 5.24
5.27
3 0.5024
0.354 187.42
6.26 6.29
4 0.5012
0.355 187.93
6.02 6.04
5 0.5077
0.359 189.99
4.93 5.01
6 0.5029
0.361 191.01
4.47 4.50
7 0.5051
0.364 192.55
3.69 3.72
Contoh perhitungan: Persamaan garis kurva standar CrIII: y = 0.638x
– 0.021 Absorbans = 0.271
y = 0.638x – 0.021
0.271 = 0.638x – 0.021
x = 0.4577 [C akhir] sebenarnya= Ca x Fp
= 0.4577 x 400 = 183.08 mgL
Kapasitas adsorpsi dan efisiensi Q = V C awal
– C akhir massa
Q = 0.25 L 200 mgL – 183.07 mgL
0.5033 = 8.41 mgg adsorben = 8.47
Persamaan garis kurva standar CrVI: y = 0.779x
– 0.011 Absorbans = 0.354
y = 0.779x – 0.011
0.354 = 0.779x – 0.011
x = 0.4685 E = C awal
– C akhir x 100 C awal
= 200 mgL – 183.07 mgL x 100
200 mgL
[C akhir] sebenarnya= Ca x Fp = 0.4685 x 400
= 187.4 mgL
Kapasitas adsorpsi dan efisiensi Q = V C awal
– C akhir massa
Q = 0.25 L 200 mgL – 187.4 mgL
0.5024 = 6.26 mgg adsorben = 6.29
E = C awal – C akhir x 100
C awal = 200 mgL
– 187.4 mgL x 100 200 mgL
Lampiran 10 Penentuan waktu kontak optimum Adsorben
Adsorpsi Waktu
jam Massa
g Absorbans
C akhir mgL
Q mgg
E
Bentonit alam CrIII
3 0.5017
0.296 198.75
0.62 0.63
6 0.5026
0.285 191.85
4.05 4.08
