J. Mater. Sci. Technol. ›› 2020, Vol. 41: 68-75.DOI: 10.1016/j.jmst.2019.09.019
• Research Article • Previous Articles Next Articles
Jin Li*(), Qin Wang, Lei Zheng, Hongbo Liu
Received:
2019-06-25
Revised:
2019-08-16
Accepted:
2019-09-10
Published:
2020-03-15
Online:
2020-04-10
Contact:
Li Jin
Jin Li, Qin Wang, Lei Zheng, Hongbo Liu. A novel graphene aerogel synthesized from cellulose with high performance for removing MB in water[J]. J. Mater. Sci. Technol., 2020, 41: 68-75.
Samples Samples | PF % | SBET (m2·g-1) | Vtotal (cm3·g-1) | Vmic (cm3·g-1) | aVmes (cm3·g-1) |
---|---|---|---|---|---|
CCA | 0 | 479.9 | 0.26 | 0.18 | 0.08 |
CGA-1 | 0.2 | 1222.4 | 0.82 | 0.36 | 0.46 |
CGA-2 | 0.5 | 1426.1 | 1.02 | 0.29 | 0.73 |
CGA-3 | 1 | 1150.1 | 0.80 | 0.37 | 0.43 |
Table 1 Pore structure parameters of the prepared samples.
Samples Samples | PF % | SBET (m2·g-1) | Vtotal (cm3·g-1) | Vmic (cm3·g-1) | aVmes (cm3·g-1) |
---|---|---|---|---|---|
CCA | 0 | 479.9 | 0.26 | 0.18 | 0.08 |
CGA-1 | 0.2 | 1222.4 | 0.82 | 0.36 | 0.46 |
CGA-2 | 0.5 | 1426.1 | 1.02 | 0.29 | 0.73 |
CGA-3 | 1 | 1150.1 | 0.80 | 0.37 | 0.43 |
Conc. (mg L-1) | Temp (K) | Qe,exp (mg g-1) | Pseudo-first order | Pseudo-second order | ||||
---|---|---|---|---|---|---|---|---|
k1 (min-1) | Qe,cal (mg/g) | R2 | k2 (g.mg-1.min-1) | Qe,cal (mg/g) | R2 | |||
100 | 298 | 199.68 | 1.2397 | 60.47 | 0.9096 | 0.1033 | 200.80 | 0.9999 |
200 | 298 | 398.80 | 0.5142 | 265.15 | 0.8507 | 0.0058 | 402.50 | 0.9998 |
300 | 298 | 446.02 | 0.3041 | 338.86 | 0.9734 | 0.0049 | 454.54 | 0.9996 |
300 | 313 | 464.77 | 0.5418 | 397.24 | 0.9358 | 0.0045 | 476.19 | 0.9997 |
333 | 493.21 | 0.5784 | 401.67 | 0.8926 | 0.0047 | 502.51 | 0.9997 |
Table 2 Kinetic parameters for adsorption of MB onto CGA-2.
Conc. (mg L-1) | Temp (K) | Qe,exp (mg g-1) | Pseudo-first order | Pseudo-second order | ||||
---|---|---|---|---|---|---|---|---|
k1 (min-1) | Qe,cal (mg/g) | R2 | k2 (g.mg-1.min-1) | Qe,cal (mg/g) | R2 | |||
100 | 298 | 199.68 | 1.2397 | 60.47 | 0.9096 | 0.1033 | 200.80 | 0.9999 |
200 | 298 | 398.80 | 0.5142 | 265.15 | 0.8507 | 0.0058 | 402.50 | 0.9998 |
300 | 298 | 446.02 | 0.3041 | 338.86 | 0.9734 | 0.0049 | 454.54 | 0.9996 |
300 | 313 | 464.77 | 0.5418 | 397.24 | 0.9358 | 0.0045 | 476.19 | 0.9997 |
333 | 493.21 | 0.5784 | 401.67 | 0.8926 | 0.0047 | 502.51 | 0.9997 |
Absorbent | Initial Conc. (mg/L) | pH | Contact time | Removal ratio(%) | Adsorption capacity (mg/g) | Refs. |
---|---|---|---|---|---|---|
AC | 120 | 6 | 2 h | 98-99.6 | 263.49 | [ |
GO | 120 | 6 | 2 h | 94.8-98.8 | 240.65 | |
Graphene | 120 | 6 | 15 h | 85.95-99.68 | 161.26 | [ |
Agar/GO | 200 | 6 | 26 h | 99 | 578 | [ |
GO/CS | 250 | 4-8 | 24 h | >92 | 275.5 | [ |
RCE/GO | 20 | 6 | 30 min | 99 | 68 | [ |
GO/hydrogel | 250 | 7 | 45 min | 99 | 714.29 | [ |
GCA-2 | 100 | 7 | 10 min | 99 | 199.08 | In this study |
PNVCCMA | 500 | 10 | 24 h | 95 | 1441 | [ |
P(AA-co-St)/complex | 1000 | 10 | 30 min | >90 | 1843.46 | [ |
MMT-PCN | 1000 | 10 | 80 min | >90 | 686.94 | [ |
PVDF/PDA/PPy | 50 | 12 | 8 h | >90 | 370.4 | [ |
GO/CS/β-CD | 1000 | 12 | 3 h | >90 | 1134 | [ |
CA-mGOCS | 1000 | 12 | 35 min | >95 | 315.5 | [ |
SCG-GAC | 2000 | 11 | 24 h | 99.6 | 986.8 | [ |
GCA-2 | 1000 | 11 | 40 min | >90 | 1200 | In this study |
Table 3 Performance comparison of the various adsorbents for removing MB.
Absorbent | Initial Conc. (mg/L) | pH | Contact time | Removal ratio(%) | Adsorption capacity (mg/g) | Refs. |
---|---|---|---|---|---|---|
AC | 120 | 6 | 2 h | 98-99.6 | 263.49 | [ |
GO | 120 | 6 | 2 h | 94.8-98.8 | 240.65 | |
Graphene | 120 | 6 | 15 h | 85.95-99.68 | 161.26 | [ |
Agar/GO | 200 | 6 | 26 h | 99 | 578 | [ |
GO/CS | 250 | 4-8 | 24 h | >92 | 275.5 | [ |
RCE/GO | 20 | 6 | 30 min | 99 | 68 | [ |
GO/hydrogel | 250 | 7 | 45 min | 99 | 714.29 | [ |
GCA-2 | 100 | 7 | 10 min | 99 | 199.08 | In this study |
PNVCCMA | 500 | 10 | 24 h | 95 | 1441 | [ |
P(AA-co-St)/complex | 1000 | 10 | 30 min | >90 | 1843.46 | [ |
MMT-PCN | 1000 | 10 | 80 min | >90 | 686.94 | [ |
PVDF/PDA/PPy | 50 | 12 | 8 h | >90 | 370.4 | [ |
GO/CS/β-CD | 1000 | 12 | 3 h | >90 | 1134 | [ |
CA-mGOCS | 1000 | 12 | 35 min | >95 | 315.5 | [ |
SCG-GAC | 2000 | 11 | 24 h | 99.6 | 986.8 | [ |
GCA-2 | 1000 | 11 | 40 min | >90 | 1200 | In this study |
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