Abstract In this study, activated carbon and humic acid powder were fixed by the cross-linking reaction of sodium alginate. Calcium alginate/activated carbon/humic acid (CAH) tri-system porous fibers were prepared by the wet spinning method and freeze-dried for the removal of tetracycline in aqueous solution. Subsequently, the morphology and structure of CAH fibers were measured by scanning electron microscopy (SEM) and the Brunauer-Emmett-Teller (BET) method. The effect of pH, contact time, temperature and other factors on adsorption behavior were analyzed. The Langmuir and Freundlich isotherm models were used to fit tetracycline adsorption equilibrium data. The dynamics data were evaluated by the pseudo-second-order model, the pseudo-second-order model and the intraparticle diffusion model. Thermodynamic study confirmed that the adsorption of tetracycline on CAH fibers was a spontaneous process.

中文翻译：

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海藻酸钙/活性炭/腐植酸三系多孔纤维去除水溶液中四环素

摘要 本研究通过海藻酸钠的交联反应固定活性炭和腐植酸粉末。采用湿法纺丝法制备海藻酸钙/活性炭/腐植酸（CAH）三系多孔纤维，并冷冻干燥以去除水溶液中的四环素。随后，通过扫描电子显微镜（SEM）和Brunauer-Emmett-Teller（BET）方法测量了CAH纤维的形态和结构。分析了pH值、接触时间、温度等因素对吸附行为的影响。Langmuir 和 Freundlich 等温线模型用于拟合四环素吸附平衡数据。动力学数据采用伪二阶模型、伪二阶模型和颗粒内扩散模型进行评价。