CIESC Journal ›› 2020, Vol. 71 ›› Issue (7): 3296-3303.DOI: 10.11949/0438-1157.20191579
• Energy and environmental engineering • Previous Articles Next Articles
Jingyu HU(),Rong YAO,Yuhang PAN,Chao ZHU,Shuang SONG,Yi SHEN()
Received:
2019-12-25
Revised:
2020-03-19
Online:
2020-07-05
Published:
2020-07-05
Contact:
Yi SHEN
通讯作者:
沈意
作者简介:
胡京宇(2000—),女,本科生,基金资助:
CLC Number:
Jingyu HU, Rong YAO, Yuhang PAN, Chao ZHU, Shuang SONG, Yi SHEN. Photo-assisted regeneration of titanium dioxide/layered double hydroxide for removal of organic dyes in water[J]. CIESC Journal, 2020, 71(7): 3296-3303.
胡京宇, 姚戎, 潘玉航, 朱超, 宋爽, 沈意. 可光助再生二氧化钛/层状双氢氧化物去除水体中有机染料[J]. 化工学报, 2020, 71(7): 3296-3303.
元素 | 项目 | TiO2/LDH 样品1 | TiO2/LDH 样品2 | TiO2/LDH 样品3 | 平均 |
---|---|---|---|---|---|
钛 | 原样钛含量/%(质量) | 1.37 | 1.35 | 1.41 | 1.38 |
TiO2负载量/%(质量) | 2.28 | 2.25 | 2.35 | 2.29 |
Table 1 Test on TiO2 loaded in TiO2/LDH
元素 | 项目 | TiO2/LDH 样品1 | TiO2/LDH 样品2 | TiO2/LDH 样品3 | 平均 |
---|---|---|---|---|---|
钛 | 原样钛含量/%(质量) | 1.37 | 1.35 | 1.41 | 1.38 |
TiO2负载量/%(质量) | 2.28 | 2.25 | 2.35 | 2.29 |
吸附剂 | 比表面积/(m2/g) | 平均孔径/nm | 孔体积/(cm3/g) |
---|---|---|---|
LDH | 59.4 | 5.66 | 0.26 |
TiO2/LDH | 67.1 | 7.34 | 0.35 |
Table 2 Specific surface area and pore textural properties of LDH and TiO2/LDH
吸附剂 | 比表面积/(m2/g) | 平均孔径/nm | 孔体积/(cm3/g) |
---|---|---|---|
LDH | 59.4 | 5.66 | 0.26 |
TiO2/LDH | 67.1 | 7.34 | 0.35 |
污染物 | 吸附剂 | Freundlich 模型 | Langmuir 模型 | ||||
---|---|---|---|---|---|---|---|
Kf | N | R2 | qm/(mg/g) | KL/(L/g) | R2 | ||
甲基橙 | LDH | 141.11867 | 0.29511 | 0.90351 | 462.34149 | 0.25171 | 0.96492 |
TiO2/LDH | 163.77771 | 0.29323 | 0.90024 | 527.49174 | 0.2654 | 0.96388 | |
亚甲基蓝 | LDH | 75.76239 | 0.2844 | 0.89484 | 166.92703 | 0.95467 | 0.95936 |
TiO2/LDH | 94.99944 | 0.29356 | 0.92097 | 208.32481 | 1.07183 | 0.9804 |
Table 3 Regression parameters of adsorption isotherms of organic dyes onto LDH and TiO2/LDH fitted by Freundlich and Langmuir models
污染物 | 吸附剂 | Freundlich 模型 | Langmuir 模型 | ||||
---|---|---|---|---|---|---|---|
Kf | N | R2 | qm/(mg/g) | KL/(L/g) | R2 | ||
甲基橙 | LDH | 141.11867 | 0.29511 | 0.90351 | 462.34149 | 0.25171 | 0.96492 |
TiO2/LDH | 163.77771 | 0.29323 | 0.90024 | 527.49174 | 0.2654 | 0.96388 | |
亚甲基蓝 | LDH | 75.76239 | 0.2844 | 0.89484 | 166.92703 | 0.95467 | 0.95936 |
TiO2/LDH | 94.99944 | 0.29356 | 0.92097 | 208.32481 | 1.07183 | 0.9804 |
污染物 | 吸附剂 | 拟一级动力学 | 拟二级动力学 | ||||
---|---|---|---|---|---|---|---|
qe/(mg/g) | k1/(1/s) | R2 | qe/(mg/g) | k2/(g/(mg·s)) | R2 | ||
甲基橙 | LDH | 178.46944 | 0.01407 | 0.97968 | 198.49873 | 0.01815 | 0.92925 |
TiO2/LDH | 206.09581 | 0.02074 | 0.98208 | 225.49671 | 0.02831 | 0.92758 | |
亚甲基蓝 | LDH | 69.2104 | 0.01416 | 0.98638 | 76.08457 | 0.01969 | 0.95594 |
TiO2/LDH | 81.4685 | 0.01977 | 0.99344 | 89.16015 | 0.02729 | 0.95272 |
Table 4 Adsorption kinetic parameters of organic dyes onto LDH and TiO2/LDH
污染物 | 吸附剂 | 拟一级动力学 | 拟二级动力学 | ||||
---|---|---|---|---|---|---|---|
qe/(mg/g) | k1/(1/s) | R2 | qe/(mg/g) | k2/(g/(mg·s)) | R2 | ||
甲基橙 | LDH | 178.46944 | 0.01407 | 0.97968 | 198.49873 | 0.01815 | 0.92925 |
TiO2/LDH | 206.09581 | 0.02074 | 0.98208 | 225.49671 | 0.02831 | 0.92758 | |
亚甲基蓝 | LDH | 69.2104 | 0.01416 | 0.98638 | 76.08457 | 0.01969 | 0.95594 |
TiO2/LDH | 81.4685 | 0.01977 | 0.99344 | 89.16015 | 0.02729 | 0.95272 |
污染物 | 吸附剂 | Recovery/% | ||||||||
---|---|---|---|---|---|---|---|---|---|---|
0.5 h | 1 h | 1.5 h | 2 h | 3 h | 4 h | 5 h | 7 h | 10 h | ||
甲基橙 | LDH | 0 | 0 | 0 | 0 | 0.4 | 1.0 | 1.3 | 1.9 | 2.2 |
TiO2/LDH | 22.52 | 42.36 | 59.95 | 73.60 | 84.89 | 93.05 | 93.95 | 93.95 | 93.94 | |
亚甲基 | LDH | 0 | 0 | 0 | 0 | 0.3 | 0.8 | 1.0 | 1.6 | 3.0 |
TiO2/LDH | 29.48 | 49.55 | 68.41 | 81.26 | 90.29 | 95.69 | 96.87 | 96.85 | 96.85 |
Table 5 Regenerated kinetic parameters of LDH and TiO2/LDH for organic dyes in timeline of photocatalytic regeneration
污染物 | 吸附剂 | Recovery/% | ||||||||
---|---|---|---|---|---|---|---|---|---|---|
0.5 h | 1 h | 1.5 h | 2 h | 3 h | 4 h | 5 h | 7 h | 10 h | ||
甲基橙 | LDH | 0 | 0 | 0 | 0 | 0.4 | 1.0 | 1.3 | 1.9 | 2.2 |
TiO2/LDH | 22.52 | 42.36 | 59.95 | 73.60 | 84.89 | 93.05 | 93.95 | 93.95 | 93.94 | |
亚甲基 | LDH | 0 | 0 | 0 | 0 | 0.3 | 0.8 | 1.0 | 1.6 | 3.0 |
TiO2/LDH | 29.48 | 49.55 | 68.41 | 81.26 | 90.29 | 95.69 | 96.87 | 96.85 | 96.85 |
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