Adsorption Characteristics of Tetracycline by CuFeO2-modified Biochar

被引：0

作者：

Liu G.-C. ^{[1
]}

Zhang X.-W. ^{[1
]}

Xin S.-S. ^{[1
]}

Wang Q.-W. ^{[2
]}

Yan Q.-H. ^{[1
]}

Zhou C.-Z. ^{[1
]}

Xin Y.-J. ^{[1
]}

机构：

[1] College of Resource and Environment, Qingdao Agricultural University, Qingdao

[2] Instrumental Analysis Center of Qingdao Agricultural University, Qingdao

来源：

Huanjing Kexue/Environmental Science | 2023年 / 44卷 / 09期

关键词：

adsorption mechanisms; adsorption performance; antibiotics; biochar; pepper straw;

D O I：

10.13227/j.hjkx.202209299

中图分类号：

学科分类号：

摘要：

CuFeO2 -modified biochars were prepared through co-precipitation and hydrothermal methods, and the composites had high efficiency removal for tetracycline (TC) from water. The CuFeO2 -modified biochar with a 2: 1 mass ratio of CuFeO2 to BC450 (CuFeO2 / BC450 = 2: 1) demonstrated the best adsorption performance. The kinetic process of TC adsorption by CuFeO2 / BC450 =2: 1 was well fitted with the intraparticle diffusion model, suggesting that the adsorption process was controlled by film and pore diffusion. Under the condition of neutral pH and 298 K, the maximum adsorption capacity of the Langmuir model of CuFeO2 / BC450 = 2: 1 was 82. 8 mg·g - 1 , which was much greater than that of BC450 (13. 7 mg·g - 1 ) and CuFeO2 (14. 8 mg·g - 1 ). The thermodynamic data suggested that TC sorption onto CuFeO2 / BC450 = 2: 1 was a spontaneous and endothermic process. The removal of TC by CuFeO2 / BC450 = 2: 1 increased first and then decreased with increasing pH, and the maximum adsorption occurred under the neutral condition. The strong adsorption of TC by CuFeO2 / BC450 =2: 1 could be attributed to better porosity, larger specific surface area, and more active sites (e. g., functional groups and charged surfaces). This work provided an efficient magnetic adsorbent for removing antibiotics. © 2023 Science Press. All rights reserved.

引用

页码：5222 / 5230

页数：8

共 46 条

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