Xing Weinan, Liu Qi, Wang Jingyi, Xia Siye, Ma Li, Lu Ran, Zhang Yujing, Huang Yudong, Wu Guangyu
Co-Innovation Center for the Sustainable Forestry in Southern China, College of Biology and the Environment, Nanjing Forestry University, Nanjing 210037, China.
National Positioning Observation Station of Hung-Tse Lake Wetland Ecosystem in Jiangsu Province, Hongze 223100, China.
Nanomaterials (Basel). 2021 Nov 3;11(11):2950. doi: 10.3390/nano11112950.
Recently, biomass-based materials have attracted increasing attention because of their advantages of low cost, environment-friendly and nonpollution. Herein, the feasibility of using corn stalk biomass fiber (CF) and FeO embedded chitosan (CS) as a novel biomass-based adsorbent (CFS) to remove chloramphenicol (CAPC) from aqueous solution. Structure of CFS was characterized by using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), Brunauer-Emmett-Teller (BET), scanning electron microscopy (SEM) and zeta potential techniques. The effects of solution pH, adsorption time and ion strength on the adsorption capacity were examined. Adsorption isotherms obtained from batch experiments were better fitted by Langmuir model compared with Freundlich model, Dubinin-Radushkevich model and Temkin model. Adsorption kinetic data matched well to the pseudo-second order kinetic model. CAPC adsorption was endothermic, spontaneous, and entropy-increasing nature on CFS. In addition, the CFS could be separated by an external magnetic field, recycled, and reused without any significant loss in the adsorption capacity of CAPC. Based on these excellent performances, there is potential that CFS can be considered as a proficient and economically suitable material for the CAPC removal from the water environment.
近年来，生物质基材料因其成本低、环境友好和无污染等优点而受到越来越多的关注。在此，研究了使用玉米秸秆生物质纤维（CF）和负载FeO的壳聚糖（CS）作为新型生物质基吸附剂（CFS）从水溶液中去除氯霉素（CAPC）的可行性。采用X射线衍射（XRD）、傅里叶变换红外光谱（FT-IR）、布鲁诺尔-埃米特-泰勒（BET）、扫描电子显微镜（SEM）和zeta电位技术对CFS的结构进行了表征。考察了溶液pH值、吸附时间和离子强度对吸附容量的影响。与弗伦德利希模型、杜宾宁-拉杜舍维奇模型和坦金模型相比，批量实验得到的吸附等温线更符合朗缪尔模型。吸附动力学数据与伪二级动力学模型吻合良好。CFS对CAPC的吸附具有吸热、自发和熵增的特性。此外，CFS可以通过外部磁场分离、回收和再利用，而CAPC的吸附容量没有任何显著损失。基于这些优异的性能，CFS有潜力被认为是一种从水环境中去除CAPC的高效且经济适用的材料。
