Qingdao Engineering Research Center for Rural Environment, College of Resource and Environment, Qingdao Agricultural University, Qingdao 266109, China.
State Environmental Protection Key Laboratory of Environ Pollut Health Risk Assessment, South China Institute of Environmental Sciences, Ministry of Ecology and Environment, Guangzhou 510655, China.
Bioresour Technol. 2023 Oct;385:129380. doi: 10.1016/j.biortech.2023.129380. Epub 2023 Jun 24.
Nano YO-modified biochar composites (YO@BC600) were fabricated successfully and exhibited great adsorption toward oxytetracycline (OTC). The Langmuir adsorption capacity of YO@BC600-1:4 for OTC reached 223.46 mg/g, 10.52 times greater than that of BC600. The higher dispersion of YO nanoparticles, increased surface area of 175.65 m/g and expanded porosity of 0.27 cm/g accounted for higher OTC adsorption by YO@BC600-1:4. YO@BC600-1:4 could resist the interference of co-existing cations (Na, K, Mg, Ca) and anions (Cl, NO, SO) on OTC removal. YO coating changed surface charge property of BC600, favoring the contribution of electrostatic interaction. Synchrotron radiation-based Fourier transform infrared spectroscopy detected obvious peak shift and intensity change of surface -OH when OTC adsorption occurred. Accordingly, stronger H-bonding (charge-assisted hydrogen bond, OTC-HN···HO-YO@BC600-1:4) was proposed for OTC adsorption. YO@BC600 exhibited renewability and stability in the adsorptive removal of OTC. Therefore, YO@BC600 may be a novel and suitable adsorbent for antibiotic removal.
纳米 YO 修饰生物炭复合材料（YO@BC600）成功制备，并对土霉素（OTC）表现出很强的吸附能力。YO@BC600-1:4 对 OTC 的朗缪尔吸附容量达到 223.46mg/g，是 BC600 的 10.52 倍。YO 纳米粒子的高分散性、175.65m/g 的增加的比表面积和 0.27cm/g 的扩展孔隙率解释了 YO@BC600-1:4 对 OTC 的高吸附性。YO@BC600-1:4 能够抵抗共存阳离子（Na、K、Mg、Ca）和阴离子（Cl、NO、SO）对 OTC 去除的干扰。YO 涂层改变了 BC600 的表面电荷性质，有利于静电相互作用的贡献。基于同步辐射的傅里叶变换红外光谱检测到 OTC 吸附时表面-OH 的明显峰位移和强度变化。因此，提出了更强的氢键（电荷辅助氢键，OTC-HN···HO-YO@BC600-1:4）用于 OTC 的吸附。YO@BC600 在吸附去除 OTC 中表现出可重复使用性和稳定性。因此，YO@BC600 可能是一种新型、合适的抗生素去除吸附剂。
