CIESC Journal ›› 2022, Vol. 73 ›› Issue (9): 3929-3939.DOI: 10.11949/0438-1157.20220501
• Separation engineering • Previous Articles Next Articles
Chengwei LI1(), Huayong LUO1(), Mingxuan ZHANG1, Peng LIAO2, Qian FANG1, Hongwei RONG1, Jingyin WANG1
Received:
2022-05-04
Revised:
2022-06-09
Online:
2022-10-09
Published:
2022-09-05
Contact:
Huayong LUO
李承威1(), 骆华勇1(), 张铭轩1, 廖鹏2, 方茜1, 荣宏伟1, 王竞茵1
通讯作者:
骆华勇
作者简介:
李承威(1996—),男,硕士研究生,1287377003@qq.com
基金资助:
CLC Number:
Chengwei LI, Huayong LUO, Mingxuan ZHANG, Peng LIAO, Qian FANG, Hongwei RONG, Jingyin WANG. Microfludically-generated lanthanum hydroxide cross-linked chitosan microspheres for phosphate removal[J]. CIESC Journal, 2022, 73(9): 3929-3939.
李承威, 骆华勇, 张铭轩, 廖鹏, 方茜, 荣宏伟, 王竞茵. 氢氧化镧交联壳聚糖微球的微流控制备及其除磷性能[J]. 化工学报, 2022, 73(9): 3929-3939.
Fig.2 Digital image of freeze-dried La-CS-M (a), SEM images of La-CS-M before (b) and after (c) phosphate adsorption, optical image of La-CS-M (d), digital (e) and SEM (f) images of freeze-dried La-CS
Fig.3 XRD pattern of La-CS-M (a), FTIR spectra of CS and La-CS-M before and after phosphate adsorption (b), particle size distribution of La-CS-M (c) and the pH at point of zero charge (pHpzc) of La-CS-M (d)
吸附剂 | 孔隙度/% | 平均孔径/nm | La负载量/%(质量) |
---|---|---|---|
La-CS-M | 89.22 | 960.0 | 36.26 |
La-CS | 87.86 | 473.9 | 37.99 |
Table 1 The pore characteristics and La loading capacities of chitosan microspheres
吸附剂 | 孔隙度/% | 平均孔径/nm | La负载量/%(质量) |
---|---|---|---|
La-CS-M | 89.22 | 960.0 | 36.26 |
La-CS | 87.86 | 473.9 | 37.99 |
Fig.4 Effect of pH on phosphate adsorption onto La-CS (a), effect of pH on phosphate adsorption onto La-CS-M (b), and species of phosphate in different pH (c)
模型 | 参数 | 数值 |
---|---|---|
准一级动力学模型 | qe/(mg/g) | 50.95 |
k1/min-1 | 6.75×10-3 | |
R2 | 0.923 | |
准二级动力学模型 | qe/(mg/g) | 57.43 |
k2/(g/(mg·min)) | 1.52×10-4 | |
R2 | 0.969 | |
颗粒内扩散模型 | k1d/(mg/(g·min0.5)) | 1.89 |
C1 | 4.82 | |
R2 | 0.989 | |
k2d/(mg/(g·min0.5)) | 0.57 | |
C2 | 33.97 | |
R2 | 0.918 | |
Langmuir模型 | qmax/(mg/g) | 56.48 |
kL/(L/mg) | 0.40 | |
R2 | 0.980 | |
Freundlich模型 | kF/(mg/g)(L/mg)1/n | 23.15 |
n | 4.11 | |
R2 | 0.962 |
Table 2 Kinetic and isotherm modeling parameters for phosphate adsorption onto La-CS-M
模型 | 参数 | 数值 |
---|---|---|
准一级动力学模型 | qe/(mg/g) | 50.95 |
k1/min-1 | 6.75×10-3 | |
R2 | 0.923 | |
准二级动力学模型 | qe/(mg/g) | 57.43 |
k2/(g/(mg·min)) | 1.52×10-4 | |
R2 | 0.969 | |
颗粒内扩散模型 | k1d/(mg/(g·min0.5)) | 1.89 |
C1 | 4.82 | |
R2 | 0.989 | |
k2d/(mg/(g·min0.5)) | 0.57 | |
C2 | 33.97 | |
R2 | 0.918 | |
Langmuir模型 | qmax/(mg/g) | 56.48 |
kL/(L/mg) | 0.40 | |
R2 | 0.980 | |
Freundlich模型 | kF/(mg/g)(L/mg)1/n | 23.15 |
n | 4.11 | |
R2 | 0.962 |
吸附剂 | 磷酸盐浓度/(mg/L) | pH | 温度/℃ | qmax/(mg/g) | 文献 |
---|---|---|---|---|---|
La-CS-M | 5~50 | 6.0±0.1 | 25 | 56.48 | 本研究 |
包埋滑石粉的海藻酸镧凝胶 | 2.5~50.0 | 4 | 25 | 16.034 | [ |
水合氧化镧改性的硅藻土 | 10~100 | 5.60 | 25 | 58.70 | [ |
氢氧化镧改性介孔稻壳生物炭 | 5~100 | 6.6 | 25 | 41.22~45.62 | [ |
MgFe2O4-生物炭基海藻酸镧珠 | 5~50 | 5.3±0.3 | 25±1 | 27.68 | [ |
包埋氢氧化镧的聚乙烯醇/海藻酸铝凝胶球 | 0~50 | 4.0 | 25 | 7.86 | [ |
掺杂氢氧化镧的活性炭纤维 | 10~70 | — | 室温 | 15.3 | [ |
Table 3 Comparison of maximum phosphate adsorption capacity (qmax) based on Langmuir model between La-CS-Mand other La-loaded adsorbents
吸附剂 | 磷酸盐浓度/(mg/L) | pH | 温度/℃ | qmax/(mg/g) | 文献 |
---|---|---|---|---|---|
La-CS-M | 5~50 | 6.0±0.1 | 25 | 56.48 | 本研究 |
包埋滑石粉的海藻酸镧凝胶 | 2.5~50.0 | 4 | 25 | 16.034 | [ |
水合氧化镧改性的硅藻土 | 10~100 | 5.60 | 25 | 58.70 | [ |
氢氧化镧改性介孔稻壳生物炭 | 5~100 | 6.6 | 25 | 41.22~45.62 | [ |
MgFe2O4-生物炭基海藻酸镧珠 | 5~50 | 5.3±0.3 | 25±1 | 27.68 | [ |
包埋氢氧化镧的聚乙烯醇/海藻酸铝凝胶球 | 0~50 | 4.0 | 25 | 7.86 | [ |
掺杂氢氧化镧的活性炭纤维 | 10~70 | — | 室温 | 15.3 | [ |
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