J. Mater. Sci. Technol. ›› 2018, Vol. 34 ›› Issue (5): 855-863.DOI: 10.1016/j.jmst.2017.03.013
• Orginal Article • Previous Articles Next Articles
Xiaogui Huangab, Xiaozhang Zhanab, Cuilian Wenab*(), ab*(), Lijin Luoc
Received:
2016-09-29
Revised:
2017-01-17
Accepted:
2017-03-10
Online:
2018-05-10
Published:
2018-05-04
Contact:
Wen Cuilian,FengXu
Xiaogui Huang, Xiaozhang Zhan, Cuilian Wen, , Lijin Luo. Amino-functionalized magnetic bacterial cellulose/activated carbon composite for Pb2+ and methyl orange sorption from aqueous solution[J]. J. Mater. Sci. Technol., 2018, 34(5): 855-863.
Fig. 5. Effect of amino groups on adsorption behavior of Pb2+ (a) (contact time was 240 min, temperature was 298 K, initial Pb2+ concentration was 90 mg L-1) and MO (b) (contact time was 180 min, temperature was 298 K, initial MO concentration was 30 mg L-1) in single pollutant system.
Fig. 6. Effect of pH on adsorption behavior of Pb2+ (a) (contact time was 240 min, temperature was 298 K, initial Pb2+ concentration was 90 mg L-1) and MO (b) (contact time was 180 min, temperature was 298 K, initial MO concentration was 30 mg L-1) in single pollutant system.
Fig. 8. Pseudo-first-order (a, b) and pseudo-second-order (c, d) kinetic models of Pb2+ (a, c) and MO (b, d) adsorption on AMBCAC for different initial concentrations in single pollutant system.
Pollutant | C0 (mg L-1) | qe,exp (mg g-1) | Pseudo-first-order model | Pseudo-second-order model | ||||
---|---|---|---|---|---|---|---|---|
k1 (min-1) | qe (mg g-1) | R12 | k2 (g mg-1 min-1) | qe (mg g-1) | R22 | |||
Pb2+ | 30 | 67.45 | 0.0506 | 34.86 | 0.9699 | 0.0029 | 70.47 | 0.9997 |
60 | 121.95 | 0.0328 | 73.36 | 0.8996 | 0.0097 | 127.55 | 0.9999 | |
90 | 147.41 | 0.0245 | 57.24 | 0.9677 | 0.0085 | 152.91 | 0.9998 | |
120 | 156.92 | 0.0185 | 36.03 | 0.9565 | 0.0012 | 159.74 | 0.9999 | |
150 | 161.16 | 0.0136 | 28.75 | 0.8713 | 0.0014 | 162.60 | 0.9999 | |
MO | 10 | 22.69 | 0.0677 | 27.27 | 0.8970 | 0.0049 | 24.72 | 0.9993 |
20 | 43.74 | 0.0381 | 29.65 | 0.9362 | 0.0022 | 46.97 | 0.9996 | |
30 | 62.13 | 0.0271 | 22.42 | 0.9277 | 0.0027 | 64.06 | 0.9999 | |
40 | 74.25 | 0.0213 | 25.10 | 0.9306 | 0.0021 | 76.05 | 0.9999 | |
50 | 83.34 | 0.0155 | 25.92 | 0.8883 | 0.0016 | 84.82 | 0.9999 |
Table 1 Adsorption kinetics model parameters for Pb2+ and MO adsorption onto AMBCAC in single pollutant system.
Pollutant | C0 (mg L-1) | qe,exp (mg g-1) | Pseudo-first-order model | Pseudo-second-order model | ||||
---|---|---|---|---|---|---|---|---|
k1 (min-1) | qe (mg g-1) | R12 | k2 (g mg-1 min-1) | qe (mg g-1) | R22 | |||
Pb2+ | 30 | 67.45 | 0.0506 | 34.86 | 0.9699 | 0.0029 | 70.47 | 0.9997 |
60 | 121.95 | 0.0328 | 73.36 | 0.8996 | 0.0097 | 127.55 | 0.9999 | |
90 | 147.41 | 0.0245 | 57.24 | 0.9677 | 0.0085 | 152.91 | 0.9998 | |
120 | 156.92 | 0.0185 | 36.03 | 0.9565 | 0.0012 | 159.74 | 0.9999 | |
150 | 161.16 | 0.0136 | 28.75 | 0.8713 | 0.0014 | 162.60 | 0.9999 | |
MO | 10 | 22.69 | 0.0677 | 27.27 | 0.8970 | 0.0049 | 24.72 | 0.9993 |
20 | 43.74 | 0.0381 | 29.65 | 0.9362 | 0.0022 | 46.97 | 0.9996 | |
30 | 62.13 | 0.0271 | 22.42 | 0.9277 | 0.0027 | 64.06 | 0.9999 | |
40 | 74.25 | 0.0213 | 25.10 | 0.9306 | 0.0021 | 76.05 | 0.9999 | |
50 | 83.34 | 0.0155 | 25.92 | 0.8883 | 0.0016 | 84.82 | 0.9999 |
Pollutant | Temperature (K) | Freundlich parameter | Langmuir parameter | ||||
---|---|---|---|---|---|---|---|
KF (L g-1) | n | R2 | KL (L mg-1) | qm (mg g-1) | R2 | ||
Pb2+ | 298 | 58.76 | 4.03 | 0.8900 | 0.23 | 169.78 | 0.9999 |
308 | 64.54 | 4.10 | 0.8984 | 0.27 | 179.53 | 0.9998 | |
318 | 78.00 | 4.58 | 0.9258 | 0.37 | 190.48 | 0.9990 | |
MO | 298 | 26.35 | 2.24 | 0.9315 | 0.32 | 98.33 | 0.9994 |
308 | 31.02 | 2.33 | 0.9127 | 0.43 | 101.42 | 0.9998 | |
318 | 40.84 | 2.59 | 0.8663 | 0.77 | 103.31 | 0.9999 |
Table 2 Adsorption isotherm model parameters for Pb2+ and MO adsorption onto AMBCAC in single pollutant system.
Pollutant | Temperature (K) | Freundlich parameter | Langmuir parameter | ||||
---|---|---|---|---|---|---|---|
KF (L g-1) | n | R2 | KL (L mg-1) | qm (mg g-1) | R2 | ||
Pb2+ | 298 | 58.76 | 4.03 | 0.8900 | 0.23 | 169.78 | 0.9999 |
308 | 64.54 | 4.10 | 0.8984 | 0.27 | 179.53 | 0.9998 | |
318 | 78.00 | 4.58 | 0.9258 | 0.37 | 190.48 | 0.9990 | |
MO | 298 | 26.35 | 2.24 | 0.9315 | 0.32 | 98.33 | 0.9994 |
308 | 31.02 | 2.33 | 0.9127 | 0.43 | 101.42 | 0.9998 | |
318 | 40.84 | 2.59 | 0.8663 | 0.77 | 103.31 | 0.9999 |
Pollutant | C0 (mg L-1) | ΔH (kJ mol-1) | ΔS (kJ mol-1 K-1) | ΔG (kJ mol-1) | ||
---|---|---|---|---|---|---|
298 K | 308 K | 318 K | ||||
Pb2+ | 30 | 39.52 | 0.16 | -7.98 | -8.99 | -11.18 |
60 | 24.53 | 0.10 | -5.97 | -6.74 | -8.00 | |
90 | 13.17 | 0.06 | -3.90 | -4.42 | -5.04 | |
120 | 12.00 | 0.05 | -2.52 | -2.94 | -3.49 | |
150 | 9.84 | 0.04 | -1.59 | -1.93 | -2.36 | |
MO | 10 | 37.76 | 0.15 | -7.93 | -9.05 | -11.01 |
20 | 36.20 | 0.14 | -7.09 | -8.10 | -10.00 | |
30 | 29.39 | 0.12 | -6.17 | -7.05 | -8.56 | |
40 | 26.31 | 0.10 | -4.89 | -5.69 | -6.99 | |
50 | 15.99 | 0.07 | -3.99 | -4.55 | -5.33 |
Table 3 Thermodynamic parameters for Pb2+ and MO adsorption onto AMBCAC in single pollutant system.
Pollutant | C0 (mg L-1) | ΔH (kJ mol-1) | ΔS (kJ mol-1 K-1) | ΔG (kJ mol-1) | ||
---|---|---|---|---|---|---|
298 K | 308 K | 318 K | ||||
Pb2+ | 30 | 39.52 | 0.16 | -7.98 | -8.99 | -11.18 |
60 | 24.53 | 0.10 | -5.97 | -6.74 | -8.00 | |
90 | 13.17 | 0.06 | -3.90 | -4.42 | -5.04 | |
120 | 12.00 | 0.05 | -2.52 | -2.94 | -3.49 | |
150 | 9.84 | 0.04 | -1.59 | -1.93 | -2.36 | |
MO | 10 | 37.76 | 0.15 | -7.93 | -9.05 | -11.01 |
20 | 36.20 | 0.14 | -7.09 | -8.10 | -10.00 | |
30 | 29.39 | 0.12 | -6.17 | -7.05 | -8.56 | |
40 | 26.31 | 0.10 | -4.89 | -5.69 | -6.99 | |
50 | 15.99 | 0.07 | -3.99 | -4.55 | -5.33 |
Fig. 9. Effect of pH on adsorption behavior of Pb2+ and MO (contact time was 240 min, temperature was 298 K, initial Pb2+ and MO concentration was 30 mg L-1) in binary pollutant system.
Adsorbate | Pb2+ | MO | ||
---|---|---|---|---|
qe | Recovery efficiency (%) | qe | Recovery efficiency (%) | |
Cycle 1 | 141.549 | 95.73 | 60.156 | 98.32 |
Cycle 2 | 136.254 | 91.55 | 58.075 | 95.48 |
Cycle 3 | 133.146 | 87.79 | 56.594 | 93.83 |
Cycle 4 | 130.782 | 85.14 | 55.632 | 92.72 |
Cycle 5 | 127.812 | 82.67 | 53.475 | 90.18 |
Table 4 Recovery efficiency of AMBCAC after adsorption of Pb2+ and MO in single pollutant system.
Adsorbate | Pb2+ | MO | ||
---|---|---|---|---|
qe | Recovery efficiency (%) | qe | Recovery efficiency (%) | |
Cycle 1 | 141.549 | 95.73 | 60.156 | 98.32 |
Cycle 2 | 136.254 | 91.55 | 58.075 | 95.48 |
Cycle 3 | 133.146 | 87.79 | 56.594 | 93.83 |
Cycle 4 | 130.782 | 85.14 | 55.632 | 92.72 |
Cycle 5 | 127.812 | 82.67 | 53.475 | 90.18 |
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