Chinese Journal of Applied Chemistry ›› 2024, Vol. 41 ›› Issue (7): 1035-1046.DOI: 10.19894/j.issn.1000-0518.240041
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Yan-Jiao REN1(), Rong-Sheng XU2, Ping WANG2, Dong SUN2, Wan-Dong GENG2, Hai-Yong ZHANG3
Received:
2024-02-04
Accepted:
2024-05-05
Published:
2024-07-01
Online:
2024-08-03
Contact:
Yan-Jiao REN
About author:
ryj844278352@163.comSupported by:
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Yan-Jiao REN, Rong-Sheng XU, Ping WANG, Dong SUN, Wan-Dong GENG, Hai-Yong ZHANG. Methylene Blue Adsorption Properties of Modified Wolfberry Biochar with EDTA-2Na[J]. Chinese Journal of Applied Chemistry, 2024, 41(7): 1035-1046.
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URL: http://yyhx.ciac.jl.cn/EN/10.19894/j.issn.1000-0518.240041
Sample | Vmic/(cm3·g-1) | Vmes/(cm3·g-1) | Vtot/(cm3·g-1) | SBET/(cm2·g-1) | Dp/nm |
---|---|---|---|---|---|
CP | 0.096 3 | 0.031 8 | 0.128 0 | 241.45 | 2.12 |
CPE | 0.380 0 | 0.112 6 | 0.492 5 | 816.47 | 2.41 |
Table 1 Specific surface area and pore structure parameters of activated carbon
Sample | Vmic/(cm3·g-1) | Vmes/(cm3·g-1) | Vtot/(cm3·g-1) | SBET/(cm2·g-1) | Dp/nm |
---|---|---|---|---|---|
CP | 0.096 3 | 0.031 8 | 0.128 0 | 241.45 | 2.12 |
CPE | 0.380 0 | 0.112 6 | 0.492 5 | 816.47 | 2.41 |
Sample | C/% | N/% | O/% | P/% | |
---|---|---|---|---|---|
CP | Total percentage/% | 58.76 | 3.14 | 31.14 | 6.96 |
CPE | 83.71 | 4.59 | 10.61 | 1.09 |
Table 2 Results of XPS analysis of surface elements of two activated carbons
Sample | C/% | N/% | O/% | P/% | |
---|---|---|---|---|---|
CP | Total percentage/% | 58.76 | 3.14 | 31.14 | 6.96 |
CPE | 83.71 | 4.59 | 10.61 | 1.09 |
Sample | Pseudo-first order model | Pseudo-second order model | ||||
---|---|---|---|---|---|---|
qe/(mg·g-1) | K1/min-1 | R2 | qe/(mg·g-1) | K2/min-1 | R2 | |
CP | 39.3 | 0.006 1 | 0.921 06 | 370.4 | 0.000 611 | 0.999 9 |
CPE | 112.3 | 0.008 1 | 0.976 5 | 662.3 | 0.000 213 | 0.999 97 |
Sample | Intraparticle diffusion model | |||||
Kid1/(mg·g-1·min-1/2) | C1 | Kid2/(mg·g-1·min-1/2) | C2 | |||
CP | 25.501 8 | 151.417 3 | 0.838 9 | 0.045 57 | 367.703 0 | 0.932 8 |
CPE | 58.012 6 | 137.331 9 | 0.955 1 | 0.402 3 | 642.076 9 | 0.601 9 |
Table 3 Main parameters of the three dynamic models
Sample | Pseudo-first order model | Pseudo-second order model | ||||
---|---|---|---|---|---|---|
qe/(mg·g-1) | K1/min-1 | R2 | qe/(mg·g-1) | K2/min-1 | R2 | |
CP | 39.3 | 0.006 1 | 0.921 06 | 370.4 | 0.000 611 | 0.999 9 |
CPE | 112.3 | 0.008 1 | 0.976 5 | 662.3 | 0.000 213 | 0.999 97 |
Sample | Intraparticle diffusion model | |||||
Kid1/(mg·g-1·min-1/2) | C1 | Kid2/(mg·g-1·min-1/2) | C2 | |||
CP | 25.501 8 | 151.417 3 | 0.838 9 | 0.045 57 | 367.703 0 | 0.932 8 |
CPE | 58.012 6 | 137.331 9 | 0.955 1 | 0.402 3 | 642.076 9 | 0.601 9 |
Sample | Freundlich | |||||
---|---|---|---|---|---|---|
qe/(mg·g-1) | KL/min-1 | R2 | KF( | 1/n | R2 | |
CP | 349.7 | 0.098 42 | 0.986 0 | 31.850 8 | 0.516 2 | 0.931 8 |
CPE | 657.9 | 0.043 48 | 0.989 6 | 14.375 1 | 0.350 3 | 0.496 2 |
Table 4 Parameters of Langmuir and Freundlich isothermal adsorption models
Sample | Freundlich | |||||
---|---|---|---|---|---|---|
qe/(mg·g-1) | KL/min-1 | R2 | KF( | 1/n | R2 | |
CP | 349.7 | 0.098 42 | 0.986 0 | 31.850 8 | 0.516 2 | 0.931 8 |
CPE | 657.9 | 0.043 48 | 0.989 6 | 14.375 1 | 0.350 3 | 0.496 2 |
Biomass | Adsorption | Specific surface area/(m2·g-1) | Pass | Nitrogenous species | MB adsorption capacity/(mg·g-1) | Ref. |
---|---|---|---|---|---|---|
Peanut shell | K2CO3+Melamine | 1 922.27 | Micropore and mesopore | Quaternary nitrogen, pyridinium oxide nitrogen | 480.5 | [ |
Corn stalk | KHCO3+Urea | 1 871 | Mesopore | Pyrrole N and pyridine N | 491 | [ |
Sichuan pepper seed | H3PO4 | 740 | Micropore and mesopore | - | 495 | [ |
Bamboo | Urea+KHCO3 | 1 693 | Mesopore | Pyridine nitrogen, pyrrole nitrogen and amino nitrogen | 499.3 | [ |
Wolfberry stalk | H3PO4+EDTA-2Na | 816.47 | Micropore and mesopore | Amido(—NH—, —NH2—) and pyrrole nitrogen | 658.8 | This work |
Table 5 Comparison of nitrogen doping modification methods and MB adsorption effects of common biomass activated carbon
Biomass | Adsorption | Specific surface area/(m2·g-1) | Pass | Nitrogenous species | MB adsorption capacity/(mg·g-1) | Ref. |
---|---|---|---|---|---|---|
Peanut shell | K2CO3+Melamine | 1 922.27 | Micropore and mesopore | Quaternary nitrogen, pyridinium oxide nitrogen | 480.5 | [ |
Corn stalk | KHCO3+Urea | 1 871 | Mesopore | Pyrrole N and pyridine N | 491 | [ |
Sichuan pepper seed | H3PO4 | 740 | Micropore and mesopore | - | 495 | [ |
Bamboo | Urea+KHCO3 | 1 693 | Mesopore | Pyridine nitrogen, pyrrole nitrogen and amino nitrogen | 499.3 | [ |
Wolfberry stalk | H3PO4+EDTA-2Na | 816.47 | Micropore and mesopore | Amido(—NH—, —NH2—) and pyrrole nitrogen | 658.8 | This work |
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