| PANIPN41 |
| Langmuir
(Cd(II)) |
|
|
|
|
|
qmax (mg g–1)/pHi/C0 (ppm) |
91.45/7/5–55 |
96.53/7/5–55 |
99.72/7/5–55 |
103.36/7/5–55 |
|
kL (L mg–1) |
0.58 |
0.44 |
0.37 |
0.33 |
|
R2/F/χ2
|
0.9979/4453.42/2.16 |
0.9995/19611.03/0.49 |
0.9981/4806.60/1.98 |
0.9977/4064.90/2.36 |
| pseudosecond order (Cd(II)) |
|
qe,cal (mg g–1)/pHi/C0 (ppm) |
9.72/7/5 |
9.87/7/5 |
9.56/7/5 |
9.39/7/5 |
|
qe,exp (mg g–1) |
9.32 ± 0.28 |
9.43 ± 0.29 |
9.26 ± 0.25 |
9.22 ± 0.21 |
|
k2 (g mg–1 min–1) |
0.0051 |
0.0058 |
0.0096 |
0.0099 |
|
R2/F/χ2
|
0.9949/12108.99/0.04 |
0.9960/15798.76/0.01 |
0.9973/23244.37/0.02 |
0.9981/34099.89/0.01 |
| Langmuir (Hg(II)) |
|
|
|
|
|
qmax (mg g–1)/pHi/C0 (ppm) |
67.98/7/5–55 |
74.74/7/5–55 |
76.28/7/5–55 |
78.44/7/5–55 |
|
kL (L mg–1) |
1.92 |
1.29 |
1.25 |
1.13 |
|
R2/F/χ2
|
0.9940/1729.04/4.53 |
0.9994/16307.55/0.52 |
0.9997/38545.76/0.23 |
0.9983/5921.10/1.50 |
| pseudosecond
order (Hg(II)) |
|
qe,cal (mg g–1)/pHi/C0 (ppm) |
10.31/7/5 |
10.05/7/5 |
9.83/7/5 |
9.64/7/5 |
|
qe,exp (mg g–1) |
9.82 ± 0.35 |
9.76 ± 0.34 |
9.72 ± 0.33 |
9.68 ± 0.31 |
|
k2 (g mg–1 min–1) |
0.0038 |
0.0049 |
0.0076 |
0.0098 |
|
R2/F/χ2
|
0.9963/13955.91/0.03 |
0.9909/5846.27/0.07 |
0.9906/5674.12/0.07 |
0.9841/3846.08/0.12 |
| Langmuir (Cr(III)) |
|
|
|
|
|
qmax (mg g–1)/pHi/C0 (ppm) |
88.10/7/5–55 |
94.75/7/5–55 |
98.09/7/5–55 |
99.41/7/5–55 |
|
kL (L mg–1) |
0.64 |
0.47 |
0.38 |
0.37 |
|
R2/F/χ2
|
0.9977/4111.10/2.29 |
0.9991/9978.40/0.96 |
0.9981/4947.31/1.92 |
0.9968/2900.53/3.28 |
| pseudosecond
order (Cr(III)) |
|
qe,cal (mg g–1)/pHi/C0 (ppm) |
10.19/7/5 |
9.88/7/5 |
9.56/7/5 |
9.37/7/5 |
|
qe,exp (mg g–1) |
9.74 ± 0.28 |
9.46 ± 0.24 |
9.28 ± 0.19 |
9.04 ± 0.17 |
|
k2 (g mg–1 min–1) |
0.0046 |
0.0057 |
0.0096 |
0.0099 |
|
R2/F/χ2
|
0.9971/20678.21/0.02 |
0.9979/30228.44/0.01 |
0.9974/24287.27/0.02 |
0.9955/14496.52/0.03 |
| Langmuir (SF) |
|
|
|
|
|
qmax (mg g–1)/pHi/C0 (ppm) |
127.61/9/5–100 |
111.52/9/5–100 |
93.53/9/5–100 |
79.10/9/5–100 |
|
kL (L mg–1) |
0.18 |
0.19 |
0.19 |
0.18 |
|
R2/F/χ2
|
0.9767/742.96/33.98 |
0.9724/666.53/32.41 |
0.9673/283.34/28.33 |
0.9529/568.97/23.59 |
| pseudosecond order (SF) |
|
|
|
|
|
qe,cal (mg g–1)/pHi/C0 (ppm) |
51.28/9/30 |
51.09/9/30 |
52.83/9/30 |
49.82/9/30 |
|
qe,exp (mg g–1) |
51.97 ± 1.56 |
51.92 ± 1.54 |
52.96 ± 1.61 |
49.58 ± 1.51 |
|
k2 (g mg–1 min–1) |
0.0036 |
0.0046 |
0.0059 |
0.0079 |
|
R2/F/χ2
|
0.9892/27082.11/1.25 |
0.9798/15267.34/2.23 |
0.9963/89214.61/0.42 |
0.9917/43830.51/0.76 |
| PANIPN21 |
| Langmuir
(Cd(II)) |
|
|
|
|
|
qmax (mg g–1)/pHi/C0 (ppm) |
74.49/7/5–55 |
77.47/7/5–55 |
80.74/7/5–55 |
83.97/7/5–55 |
|
kL (L mg–1) |
0.42 |
0.36 |
0.31 |
0.28 |
|
R2/F/χ2
|
0.9939/1661.10/4.30 |
0.9999/67099.63/0.11 |
0.9982/5387.70/1.37 |
0.9972/3538.10/2.13 |
| pseudosecond order (Cd(II)) |
|
qe,cal (mg g–1)/pHi/C0 (ppm) |
9.97/7/5 |
9.61/7/5 |
9.23/7/5 |
9.17/7/5 |
|
qe,exp (mg g–1) |
9.28 ± 0.24 |
9.27 ± 0.23 |
8.99 ± 0.19 |
9.04 ± 0.25 |
|
k2 (g mg–1 min–1) |
0.0039 |
0.0054 |
0.0074 |
0.0092 |
|
R2/F/χ2
|
0.9909/6174.39/0.07 |
0.9959/15849.90/0.03 |
0.9960/16375.92/0.03 |
0.9979/33754.26/0.01 |
| Langmuir (Hg(II)) |
|
|
|
|
|
qmax (mg g–1)/pHi/C0 (ppm) |
90.68/7/5–55 |
92.09/7/5–55 |
95.30/7/5–55 |
96.78/7/5–55 |
|
kL (L mg–1) |
0.72 |
0.73 |
0.71 |
0.68 |
|
R2/F/χ2
|
0.9926/1276.46/7.73 |
0.9975/3768.59/2.66 |
0.9981/4434.78/2.32 |
0.9985/6171.49/1.68 |
| pseudosecond
order (Hg(II)) |
|
qe,cal (mg g–1)/pHi/C0 (ppm) |
10.09/7/5 |
10.09/7/5 |
9.84/7/5 |
9.82/7/5 |
|
qe,exp (mg g–1) |
9.79 ± 0.27 |
9.71 ± 0.26 |
9.68 ± 0.22 |
9.61 ± 0.20 |
|
k2 (g mg–1 min–1) |
0.0044 |
0.0055 |
0.0083 |
0.0091 |
|
R2/F/χ2
|
0.9989/46795.04/0.09 |
0.9981/27447.82/0.02 |
0.9937/8132.33/0.05 |
0.9961/13550.82/0.03 |
| Langmuir (Cr(III)) |
|
|
|
|
|
qmax (mg g–1)/pHi/C0 (ppm) |
71.44/7/5–55 |
76.12/7/5–55 |
79.48/7/5–55 |
83.11/7/5–55 |
|
kL (L mg–1) |
0.47 |
0.39 |
0.33 |
0.29 |
|
R2/F/χ2
|
0.9994/16002.60/0.43 |
0.9994/16246.01/0.45 |
0.9971/3349.13/2.19 |
0.9975/3939.60/1.90 |
| pseudosecond
order (Cr(III)) |
|
qe,cal (mg g–1)/pHi/C0 (ppm) |
10.19/7/5 |
9.79/7/5 |
9.53/7/5 |
9.35/7/5 |
|
qe,exp (mg g–1) |
9.32 ± 0.29 |
9.24 ± 0.26 |
9.09 ± 0.21 |
9.04 ± 0.22 |
|
k2 (g mg–1 min–1) |
0.0046 |
0.0050 |
0.0069 |
0.0086 |
|
R2/F/χ2
|
0.9971/20678.21/0.02 |
0.9939/10176.44/0.04 |
0.9951/12750.37/0.03 |
0.9943/11369.41/0.04 |
| Langmuir (SF) |
|
|
|
|
|
qmax (mg g–1)/pHi/C0 (ppm) |
117.60/9/5–100 |
102.40/9/5–100 |
87.50/9/5–100 |
71.02/9/5–100 |
|
kL (L mg–1) |
0.22 |
0.23 |
0.24 |
0.28 |
|
R2/F/χ2
|
0.9827/1036.80/23.14 |
0.9810/1015.93/20.07 |
0.9718/739.82/22.33 |
0.9494/416.37/27.28 |
| pseudosecond order (SF) |
|
|
|
|
|
qe,cal (mg g–1)/pHi/C0 (ppm) |
52.13/9/30 |
51.99/9/30 |
46.21/9/30 |
44.66/9/30 |
|
qe,exp (mg g–1) |
53.85 ± 1.76 |
51.99 ± 1.56 |
49.16 ± 1.43 |
47.51 ± 1.39 |
|
k2 (g mg–1 min–1) |
0.0021 |
0.0018 |
0.0014 |
0.0013 |
|
R2/F/χ2
|
0.9621/7776.66/4.79 |
0.9471/4009.04/7.14 |
0.9522/3866.67/6.40 |
0.9559/3846.83/5.88 |
