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Magnetic nanoparticle modified moss Biochar: A novel solution for effective removal of enrofloxacin from aquaculture water

文献类型： 外文期刊

作者： Yang, Ruonan 1 ; Li, Zhonghua 1 ; Pitakrattanawong, Chompoonuch 1 ; Zhu, Lei 1 ; Li, Bingzhi 1 ; Fang, Longxiang 2 ; Fan, Limin 1 ; Song, Chao 1 ; Meng, Shunlong 2 ;

作者机构： 1.Nanjing Normal Univ, Sch Food Sci & Pharmaceut Engn, Nanjing 210023, Peoples R China

2.Nanjing Agr Univ, Wuxi Fisheries Coll, Wuxi 214081, Peoples R China

3.Chinese Acad Fishery Sci, Freshwater Fisheries Res Ctr, Wuxi 214081, Peoples R China

4.Minist Agr & Rural Affairs, Lab Qual & Safety Risk Assessment Aquat Prod Envir, Wuxi 214081, Peoples R China

5.Minist Agr & Rural Affairs, Key Lab Control Qual & Safety Aquat Prod, Beijing 100000, Peoples R China

6.Chinese Acad Fishery Sci, Freshwater Fisheries Res Ctr, Key Lab Freshwater Fisheries & Germplasm Resources, Minist Agr & Rural Affairs, Wuxi 214081, Peoples R China

关键词： Resource recycling; Enrofloxacin; Magnetic biochar; Adsorption mechanism

期刊名称：JOURNAL OF ENVIRONMENTAL MANAGEMENT （ 影响因子：8.4； 五年影响因子：8.6 ）

ISSN： 0301-4797

年卷期： 2025 年 373 卷

页码：

收录情况： SCI

摘要： The presence of residual antibiotics in water constitutes a potential threat to aquatic environments. Therefore, designing environmentally friendly and efficient biochar adsorbents is crucial. Aquaculture by-product moss ( bryophyte ) was transformed into biochar, which can eliminate antibiotics from wastewater through adsorption. This study successfully fabricated moss biochar (BC) and magnetically modified moss biochar (MBC), and explored their adsorption performance for enrofloxacin (ENR). Characterization analyses revealed that the specific surface area, total pore volume, and the quantity of functional groups of the MBC were significantly larger than those of the BC. The Langmuir isotherm model suggests that the maximum adsorption capacities of BC and MBC for ENR are 7.24 mg g-1 and 11.62 mg g-1. The adsorption process conforms to a pseudo-second- order kinetic model. Studies carried out at different temperatures disclose the spontaneous and endothermic thermodynamic characteristics of the system. Under neutral conditions, the adsorption efficiency attains its peak. The existence of various coexisting ions in water exerts a negligible influence on the adsorption process; furthermore, when the concentration of humic acid (HA) ranges from 0 to 20 mg/L, the removal rate remains above 90%. In actual water samples, the antibiotic removal rate can be as high as 96.84%. After three cycles of reuse, the structure of MBC remains unchanged while maintaining a high removal efficiency. The primary mechanisms for antibiotic adsorption by MBC involve electrostatic interactions, hydrophobic interactions, pore- filling effects, hydrogen bonding, and it-it interactions. This reusable magnetic moss biochar provides a promising research direction for effectively eliminating antibiotics from water sources.

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