摘要
【目的】为解决磷酸盐导致的水体富营养化问题并缓解国内磷资源短缺的状况,以腈纶纤维为原料,采用水热法和原位氧化法,成功制备了一种新型的Fe2O3负载的多巴胺功能化腈纶纤维(PDA/PANF-Fe2O3),系统研究其对水体磷酸盐的去除性能。【方法】通过元素分析(EA)、扫描电子显微镜(SEM)、傅里叶红外光谱(FTIR)和X射线衍射(XRD)等方法,对比各合成阶段纤维的表面微结构的差异,同时成功地将聚多巴胺与Fe2O3接枝到纤维表面。【结果】吸附试验表明,聚多巴胺和Fe2O3的修饰显著提高了纤维对磷酸盐的去除能力,且PDA/PANF-Fe2O3具有广泛的pH值适应能力,其中pH值为4时吸附能力最优。通过吸附动力学和吸附等温学模型的分析,PDA/PANF-Fe2O3对磷酸盐具有较高的去除效率,60 min达到吸附饱和。PDA/PANF-Fe2O3对磷酸盐的吸附行为更趋近于单分子层化学吸附模式,其对磷的最大理论吸附量达到了2.09 mg•g-1。此外,通过X射线光电子能谱(XPS)分析了功能化纤维对磷酸盐的去除机制,纤维表面负载的Fe2O3与磷酸盐形成铁磷配合物。【结论】研究结果为水体磷酸盐的去除和纤维功能化利用提供新的技术支撑。
[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 polyacrylonitrile fiber(PDA/PANF-Fe_(2)O_(3))was successfully prepared using acrylic fiber as the raw material through hydrothermal and in-situ oxidation methods.The adsorption performance of PDA/PANF-Fe_(2)O_(3)for aqueous phosphates was systematically investigated.[Method]Elemental analysis(EA),scanning electron mi-croscopy(SEM),Fourier-transform infrared spectroscopy(FTIR),and X-ray diffraction(XRD)were employed to compare the differences in surface microstructures of the fibers at various synthesis stages,and polydopamine and Fe_(2)O_(3)were successfully grafted onto the fiber surface.[Result]Adsorption tests showed that the modification of poly-dopamine and Fe_(2)O_(3)significantly improved the removal ability of the fiber for phosphate,and 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-Fe_(2)O_(3)has a high removal efficiency for phosphates,reaching adsorption saturation within 60 minutes.Furthermore,the adsorption behavior of PDA/PANF-Fe_(2)O_(3)for phosphate was closer to the single-molecule layer chemical adsorption mode,with a maximum theoretical adsorption capacity of 2.09 mg·g^(-1)for phosphorus.In addition,the removal mechanism of PDA/PANF-Fe_(2)O_(3)for phosphate was analyzed through XPS,showing that Fe_(2)O_(3)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.
作者
刘培森
张盼盼
谭胜金
李延君
刘世恒
程启鹏
束维正
徐刚
熊启中
叶新新
LIU Peisen;ZHANG Panpan;TAN Shengjin;LI Yanjun;LIU Shiheng;CHENG Qipeng;SHU Weizheng;XU Gang;XIONG Qizhong;YE Xinxin(School of Resources and Environment,Anhui Agricultural University/Anhui Province Key Lab of Farmland Ecological Conservation and Nutrient Utilization/Anhui Province Engineering and Technology Research Center of Intelligent Manufacture and Efficient Utilization of Green Phosphorus Fertilizer,Hefei 230036,China;Key Laboratory of JiangHuai Arable Land Resources Protection and Eco-restoration,Ministry of Natural Resources,Hefei 230036,China;CNSIG Anhui Hongsifang Fertilizer Co.,Ltd.,Research Institute of Green Intelligent Compound Fertilizer,Hefei 231602,China)
出处
《安徽农业大学学报》
2025年第1期63-71,共9页
Journal of Anhui Agricultural University
基金
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)
安徽省科技重大专项(202103a06020012)共同资助。
关键词
吸附
磷酸盐
农业面源污染
腈纶纤维
资源化利用
adsorption
phosphate
agricultural non-point source pollution
polyacrylonitrile fiber
resource utilization
