Adsorptive decontamination of antibiotics from livestock wastewater by using alkaline-modified biochar

被引:66
|
作者
Zhao, Haiyan [1 ]
Wang, Ziqian [1 ]
Liang, Yonghong [2 ]
Wu, Tianxiang [2 ]
Chen, Yiliang [3 ]
Yan, Jieru [1 ]
Zhu, Yiyong [1 ]
Ding, Dahu [1 ]
机构
[1] Nanjing Agr Univ, Coll Resources & Environm Sci, Nanjing 210095, Peoples R China
[2] Jiangsu Prov Cultivated Land Qual & Agr Environm P, Nanjing, Peoples R China
[3] Nanjing Forestry Univ, Coll Biol & Environm, Nanjing 210037, Peoples R China
关键词
Oxygen-containing groups; Computational analysis; Adsorption site; Kinetics; Isotherm; RESISTANCE GENES; AQUEOUS-SOLUTIONS; REMOVAL; AMOXICILLIN; SORPTION; CARBON;
D O I
10.1016/j.envres.2023.115676
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Efficient abatement of antibiotics from livestock wastewater is in urgent demand, but still challenging. In this study, alkaline-modified biochar with larger surface area (130.520 m(2) (-1)) and pore volume (0.128 cm3 (-1)) was fabricated and explored for the adsorption of different types of antibiotics from livestock wastewater. Batch adsorption experiments demonstrated that the adsorption process was mainly determined by chemisorption and was heterogeneous, which could be moderately affected by the variations of solution pH (3-10). Furthermore, the computational analysis based on density functional theory (DFT) indicated that the -OH groups on biochar surface could serve as the dominant active sites for antibiotics adsorption due to the strongest adsorption en-ergies between antibiotics and -OH groups. In addition, the antibiotics removal was also evaluated in multi-pollutants system, where biochar performed synergistic adsorption towards Zn2+/Cu2+ and antibiotics. Over-all, these findings not only deepen our understandings on the adsorption mechanism between biochar and an-tibiotics, but also promote the application of biochar in the remediation of livestock wastewater.
引用
收藏
页数:9
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