由农业废弃物制备的新型壳聚糖-生物炭复合材料用于去除水中的磺胺甲恶唑抗生素。
New chitosan-biochar composite derived from agricultural waste for removing sulfamethoxazole antibiotics in water.
机构信息
Faculty of Environmental Sciences, University of Science, Vietnam National University, Hanoi, 334 Nguyen Trai Road, Thanh Xuan District, Hanoi, Viet Nam.
Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Broadway, NSW 2007, Australia.
出版信息
Bioresour Technol. 2023 Oct;385:129384. doi: 10.1016/j.biortech.2023.129384. Epub 2023 Jun 22.
This study aims to develop a new chitosan-biochar composite derived from agricultural waste for removing sulfamethoxazole (SMX) antibiotics in water. Biochar was prepared from orange peel (OB) and spent coffee grounds (SCB). To fabricate chitosan-biochar composites, chitosan and biochar were crosslinked with glutaraldehyde. Results showed that pH, adsorbent dosage, time, temperature, and initial concentrations have a significant impact on the SMX adsorption. The adsorption data was better described by Langmuir (with good regression) than Freundlich model. The highest adsorption capacity (Q) of SMX on OB, SCB, CTS-OB, and CTS-SCB were 3.49, 7.65, 7.24, and 14.73 mg/g, respectively. The Freundlich constant (K) values for adsorption capacity were 1.66, 1.91, 2.57, and 5.57 (mgL/g), respectively, for OB, SCB, CTS-OB, and CTS-SCB. Ion exchange, π bonding, hydrogen bonding and pore filling, were proposed as dominant mechanisms of SMX removal process.
本研究旨在开发一种源自农业废弃物的新型壳聚糖-生物炭复合材料，用于去除水中的磺胺甲恶唑（SMX）抗生素。生物炭由橙皮（OB）和废咖啡渣（SCB）制备而成。为了制备壳聚糖-生物炭复合材料，壳聚糖和生物炭用戊二醛交联。结果表明，pH、吸附剂用量、时间、温度和初始浓度对 SMX 的吸附有显著影响。吸附数据更符合朗缪尔模型（具有良好的回归），而不是弗伦德利希模型。SMX 在 OB、SCB、CTS-OB 和 CTS-SCB 上的最大吸附容量（Q）分别为 3.49、7.65、7.24 和 14.73mg/g。吸附容量的弗伦德利希常数（K）值分别为 1.66、1.91、2.57 和 5.57（mgL/g），适用于 OB、SCB、CTS-OB 和 CTS-SCB。提出离子交换、π键合、氢键和孔填充是去除 SMX 的主要机制。
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