硅酸盐通报 ›› 2026, Vol. 45 ›› Issue (9): 3245-3256.DOI: 10.16552/j.cnki.issn1001-1625.2026.0372
收稿日期:2026-04-21
修订日期:2026-06-08
出版日期:2026-09-15
发布日期:2026-10-09
通信作者:
欧晓霞,博士,教授。E-mail:ouxiaoxia@dlnu.edu.cn作者简介:崔亚宁(2004—),女。主要从事环境化学的研究。E-mail:1959724082@qq.com
基金资助:
CUI Yaning(
), QU Shu, WANG Weiqi, LIANG Chunyang, OU Xiaoxia(
)
Received:2026-04-21
Revised:2026-06-08
Published:2026-09-15
Online:2026-10-09
摘要:
随着水体抗生素残留问题日益突出,开发低成本、高效且环境友好的吸附材料对诺氟沙星(NOR)等抗生素的污染治理具有重要意义。以水稻秸秆为原料制备生物炭,并通过铁、锰对生物炭进行改性,用于吸附去除水体中的NOR。通过FT-IR、XRD、SEM和BET等表征手段分析了改性前后生物炭的结构与表面性质,并系统考察了不同材料对NOR的吸附动力学、热力学特性及吸附机制。在 298 K、pH=5.2±0.1条件下进行动力学吸附试验,在 298、308、318 K及pH=5.2±0.1 条件下进行等温吸附试验。结果表明,铁锰改性生物炭(FMBC)引入了更多的金属活性位点,并呈现出高比表面积(222.23 m2/g)和以 2~10 nm为主的发达介孔结构,这有利于NOR的化学吸附。在318 K条件下,FMBC的NOR平衡吸附量最大,为69.44 mg/g。FMBC对NOR的吸附机制主要涉及孔隙填充、氢键、π-π电子供体-受体相互作用等多种物理化学机制。
中图分类号:
崔亚宁, 曲书, 王玮琦, 梁春洋, 欧晓霞. 铁锰改性水稻秸秆生物炭对诺氟沙星的吸附性能及机理研究[J]. 硅酸盐通报, 2026, 45(9): 3245-3256.
CUI Yaning, QU Shu, WANG Weiqi, LIANG Chunyang, OU Xiaoxia. Adsorption Performance and Mechanism of Norfloxacin by Fe-Mn Modified Rice Straw Biochar[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2026, 45(9): 3245-3256.
| Biochar | BET surface area/(m2·g-1) | Total pore volume/(cm3·g-1) | Micropore volume/(cm3·g-1) | BJH adsorption average pore diameter/nm |
|---|---|---|---|---|
| FBC | 33.48 | 0.069 | 0.001 373 | 17.83 |
| MBC | 1.49 | 0.007 | 0.001 401 | 39.95 |
| FMBC | 222.23 | 0.168 | 0.015 554 | 4.06 |
表1 FBC、MBC和FMBC的结构特征
Table 1 Structural characteristics of FBC, MBC and FMBC
| Biochar | BET surface area/(m2·g-1) | Total pore volume/(cm3·g-1) | Micropore volume/(cm3·g-1) | BJH adsorption average pore diameter/nm |
|---|---|---|---|---|
| FBC | 33.48 | 0.069 | 0.001 373 | 17.83 |
| MBC | 1.49 | 0.007 | 0.001 401 | 39.95 |
| FMBC | 222.23 | 0.168 | 0.015 554 | 4.06 |
| Biochar | Pseudo-first-order kinetics | Pseudo-second-order kinetics | ||||
|---|---|---|---|---|---|---|
| Qe1/(mg·g-1) | k1/min-1 | R | Qe2/(mg·g-1) | k2/min-1 | R | |
| BC | 8.61 | 0.030 | 0.924 | 20.00 | 0.019 | 1.000 |
| FBC | 16.58 | 0.031 | 0.941 | 18.18 | 0.006 | 0.998 |
| MBC | 16.74 | 0.022 | 0.869 | 19.61 | 0.005 | 0.997 |
| FMBC | 7.21 | 0.026 | 0.943 | 20.41 | 0.025 | 1.000 |
表2 BC、FBC、MBC、FMBC对NOR的吸附动力学模型参数
Table 2 Adsorption kinetic model parameters of BC, FBC, MBC and FMBC for NOR
| Biochar | Pseudo-first-order kinetics | Pseudo-second-order kinetics | ||||
|---|---|---|---|---|---|---|
| Qe1/(mg·g-1) | k1/min-1 | R | Qe2/(mg·g-1) | k2/min-1 | R | |
| BC | 8.61 | 0.030 | 0.924 | 20.00 | 0.019 | 1.000 |
| FBC | 16.58 | 0.031 | 0.941 | 18.18 | 0.006 | 0.998 |
| MBC | 16.74 | 0.022 | 0.869 | 19.61 | 0.005 | 0.997 |
| FMBC | 7.21 | 0.026 | 0.943 | 20.41 | 0.025 | 1.000 |
| Biochar | k3(1)/ (mg·g-1·min-1/2) | C1(1) | R | k3(2)/ (mg·g-1·min-1/2) | C1(2) | R | k3(3)/ (mg·g-1·min-1/2) | C1(3) | R |
|---|---|---|---|---|---|---|---|---|---|
| BC | 1.877 | 7.620 | 0.978 | 0.365 | 16.008 | 0.823 | 0.010 | 19.747 | 0.755 |
| FBC | 1.826 | 1.676 | 0.963 | 0.046 | 16.831 | 0.892 | |||
| MBC | 1.349 | 4.296 | 0.986 | 0.225 | 15.209 | 0.996 | |||
| FMBC | 2.514 | 9.519 | 0.988 | 0.438 | 15.919 | 0.972 | 0.049 | 19.459 | 0.825 |
表3 颗粒内扩散模型参数
Table 3 Particle internal diffusion model parameters
| Biochar | k3(1)/ (mg·g-1·min-1/2) | C1(1) | R | k3(2)/ (mg·g-1·min-1/2) | C1(2) | R | k3(3)/ (mg·g-1·min-1/2) | C1(3) | R |
|---|---|---|---|---|---|---|---|---|---|
| BC | 1.877 | 7.620 | 0.978 | 0.365 | 16.008 | 0.823 | 0.010 | 19.747 | 0.755 |
| FBC | 1.826 | 1.676 | 0.963 | 0.046 | 16.831 | 0.892 | |||
| MBC | 1.349 | 4.296 | 0.986 | 0.225 | 15.209 | 0.996 | |||
| FMBC | 2.514 | 9.519 | 0.988 | 0.438 | 15.919 | 0.972 | 0.049 | 19.459 | 0.825 |
| Biochar | T/K | Langmuir | Freundlich | ||||
|---|---|---|---|---|---|---|---|
| Qm/(mg·g-1) | KL/(L·mg-1) | R2 | 1/n1 | KF/[mg·g-1·(L·mg-1)1/n | R2 | ||
| BC | 298 | 40.65 | 0.875 | 0.986 | 2.949 | 0.328 | 0.838 |
| 308 | 47.85 | 0.704 | 0.981 | 3.003 | 0.394 | 0.911 | |
| 318 | 59.88 | 0.923 | 0.928 | 3.123 | 0.558 | 0.950 | |
| FBC | 298 | 32.79 | 0.625 | 0.997 | 2.666 | 0.310 | 0.951 |
| 308 | 32.79 | 0.774 | 0.995 | 2.747 | 0.293 | 0.974 | |
| 318 | 50.00 | 0.509 | 0.956 | 2.893 | 0.396 | 0.967 | |
| MBC | 298 | 37.31 | 0.276 | 0.995 | 2.376 | 0.114 | 0.628 |
| 308 | 36.63 | 0.333 | 0.991 | 2.376 | 0.435 | 0.960 | |
| 318 | 54.35 | 0.276 | 0.914 | 2.666 | 0.466 | 0.958 | |
| FMBC | 298 | 51.55 | 0.829 | 0.990 | 3.220 | 0.307 | 0.940 |
| 308 | 48.08 | 1.748 | 0.996 | 3.314 | 0.306 | 0.922 | |
| 318 | 69.44 | 0.758 | 0.947 | 3.417 | 0.411 | 0.984 | |
表4 不同类型生物炭吸附NOR的等温吸附模型拟合参数
Table 4 Isothermal adsorption model fitting parameters for NOR adsorption by different types of biochar
| Biochar | T/K | Langmuir | Freundlich | ||||
|---|---|---|---|---|---|---|---|
| Qm/(mg·g-1) | KL/(L·mg-1) | R2 | 1/n1 | KF/[mg·g-1·(L·mg-1)1/n | R2 | ||
| BC | 298 | 40.65 | 0.875 | 0.986 | 2.949 | 0.328 | 0.838 |
| 308 | 47.85 | 0.704 | 0.981 | 3.003 | 0.394 | 0.911 | |
| 318 | 59.88 | 0.923 | 0.928 | 3.123 | 0.558 | 0.950 | |
| FBC | 298 | 32.79 | 0.625 | 0.997 | 2.666 | 0.310 | 0.951 |
| 308 | 32.79 | 0.774 | 0.995 | 2.747 | 0.293 | 0.974 | |
| 318 | 50.00 | 0.509 | 0.956 | 2.893 | 0.396 | 0.967 | |
| MBC | 298 | 37.31 | 0.276 | 0.995 | 2.376 | 0.114 | 0.628 |
| 308 | 36.63 | 0.333 | 0.991 | 2.376 | 0.435 | 0.960 | |
| 318 | 54.35 | 0.276 | 0.914 | 2.666 | 0.466 | 0.958 | |
| FMBC | 298 | 51.55 | 0.829 | 0.990 | 3.220 | 0.307 | 0.940 |
| 308 | 48.08 | 1.748 | 0.996 | 3.314 | 0.306 | 0.922 | |
| 318 | 69.44 | 0.758 | 0.947 | 3.417 | 0.411 | 0.984 | |
| Biochar | T/K | ΔG/(kJ·mol-1) | ΔH/(kJ·mol-1) | ΔS/(J·mol-1·K-1) |
|---|---|---|---|---|
| BC | 298 | -7.76 | 18.09 | 81.05 |
| 308 | -6.76 | |||
| 318 | -6.13 | |||
| FBC | 298 | -6.49 | 21.41 | 87.31 |
| 308 | -5.26 | |||
| 318 | -4.73 | |||
| MBC | 298 | -5.56 | 43.38 | 153.92 |
| 308 | -4.11 | |||
| 318 | -2.48 | |||
| FMBC | 298 | -8.97 | 16.13 | 78.85 |
| 308 | -8.14 | |||
| 318 | -7.39 |
表5 不同类型生物炭吸附NOR的热力学参数
Table 5 Thermodynamic parameters for NOR adsorption by different types of biochar
| Biochar | T/K | ΔG/(kJ·mol-1) | ΔH/(kJ·mol-1) | ΔS/(J·mol-1·K-1) |
|---|---|---|---|---|
| BC | 298 | -7.76 | 18.09 | 81.05 |
| 308 | -6.76 | |||
| 318 | -6.13 | |||
| FBC | 298 | -6.49 | 21.41 | 87.31 |
| 308 | -5.26 | |||
| 318 | -4.73 | |||
| MBC | 298 | -5.56 | 43.38 | 153.92 |
| 308 | -4.11 | |||
| 318 | -2.48 | |||
| FMBC | 298 | -8.97 | 16.13 | 78.85 |
| 308 | -8.14 | |||
| 318 | -7.39 |
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