安徽农业大学学报2025，Vol.52Issue(1)：63-71,9.DOI:10.13610/j.cnki.1672-352x.20250320.021
铁氧化物复合纤维的制备及其去除磷酸盐的性能研究
Preparation of iron oxide composite fibers and its removal performance for phosphate
摘要
Abstract
[Objective]In order to solve the problem of eutrophication caused by phosphate in water bodies and alleviate the tension of domestic phosphorus resources,a new type of dopamine-functionalized polyacryloni-trile fiber(PDA/PANF-Fe2O3)was successfully prepared using acrylic fiber as the raw material through hydro-thermal and in-situ oxidation methods.The adsorption performance of PDA/PANF-Fe2O3 for aqueous phosphates was systematically investigated.[Method]Elemental analysis(EA),scanning electron microscopy(SEM),Fouri-er-transform infrared spectroscopy(FTIR),and X-ray diffraction(XRD)were employed to compare the differ-ences in surface microstructures of the fibers at various synthesis stages,and polydopamine and Fe2O3 were suc-cessfully grafted onto the fiber surface.[Result]Adsorption tests showed that the modification of poly-dopamine and Fe2O3 significantly improved the removal ability of the fiber for phosphate,and PDA/PANF-Fe2O3 had a wide range of pH adaptability,with the optimal adsorption capacity at pH 4.The adsorption data was studied through adsorption kinetics and adsorption isotherm models,revealed that PDA/PANF-Fe2O3 has a high removal efficien-cy for phosphates,reaching adsorption saturation within 60 minutes.Furthermore,the adsorption behavior of PDA/PANF-Fe2O3 for phosphate was closer to the single-molecule layer chemical adsorption mode,with a maxi-mum theoretical adsorption capacity of 2.09 mg·g-1 for phosphorus.In addition,the removal mechanism of PDA/PANF-Fe2O3 for phosphate was analyzed through XPS,showing that Fe2O3 loaded on the fiber surface formed an iron-phosphate complex with phosphate.[Conclusion]This study provides new technical support for the removal of phosphate in water and the application of functionalized fibers.关键词
吸附/磷酸盐/农业面源污染/腈纶纤维/资源化利用Key words
adsorption/phosphate/agricultural non-point source pollution/polyacrylonitrile fiber/resource utilization分类
化学化工引用本文复制引用
刘培森,叶新新,张盼盼,谭胜金,李延君,刘世恒,程启鹏,束维正,徐刚,熊启中..铁氧化物复合纤维的制备及其去除磷酸盐的性能研究[J].安徽农业大学学报,2025,52(1):63-71,9.基金项目
国家自然科学基金(22208003),国家重点研发计划课题(2023YFD1700205),安徽省研究生创新创业实践项目(2022cxcysj061,2022cxcysj059),安徽省教育厅重点项目(2022AH050886)和安徽省科技重大专项(202103a06020012)共同资助. （22208003）
