College of Environmental Engineering, Henan University of Technology, Zhengzhou, Henan 450001, China.
College of Environmental Engineering, Henan University of Technology, Zhengzhou, Henan 450001, China; Zhengzhou Key Laboratory of Organic Waste Resource Utilization, Zhengzhou, Henan 450001, China.
Bioresour Technol. 2022 Apr;350:126884. doi: 10.1016/j.biortech.2022.126884. Epub 2022 Feb 24.
In this study, sycamore flocs (SF), which caused environmental and health problems, were utilized to prepare biochar. SFB obtained under the conditions of activation agent KCO, pyrolysis temperature 900℃ and m(KCO):m(BC) 2 had the strongest adsorption capacity (730 mg/g) for oxytetracycline hydrochloride (OTC-HCl). The pseudo-second-order kinetic model and Langmuir model described the adsorption kinetics and isotherms best. SFB exhibited high OTC-HCl adsorption capacity in both higher ionic strength and wide pH range. The theoretical simulation indicated that the closest interaction distance between OTC-HCl and SFB was 2.44 Å via π-π stacking configuration. Pore filling, π-π electron donor acceptor (EDA) interaction, H-bonding and electrostatic interactions were also involved in the process of OTC-HCl removal. SFB showed great removal efficiency for OTC-HCl in different water matrices and good regeneration ability. This study solved the problems caused by SF, realized waste biomass recycling, and achieved preparing high-efficient adsorbent for antibiotic.
在这项研究中，我们利用导致环境和健康问题的枫杨树絮来制备生物炭。在活化剂 KCO、热解温度 900℃和 m(KCO):m(BC)=2 的条件下得到的 SFB 对盐酸土霉素（OTC-HCl）具有最强的吸附能力（730mg/g）。准二级动力学模型和 Langmuir 模型最能描述吸附动力学和等温线。SFB 在较高离子强度和较宽 pH 范围内均表现出较高的 OTC-HCl 吸附容量。理论模拟表明，通过π-π堆积构型，OTC-HCl 和 SFB 之间的最接近相互作用距离为 2.44Å。在去除 OTC-HCl 的过程中还涉及到孔填充、π-π 电子供体受体（EDA）相互作用、氢键和静电相互作用。SFB 在不同水基质中对 OTC-HCl 表现出很高的去除效率和良好的再生能力。本研究解决了枫杨树絮带来的问题，实现了废生物质的回收利用，并制备了高效的抗生素吸附剂。
