Lanthanum ferrite modified filling materials and its enhancement for phosphorus and COD removal: Performance and mechanism
文献类型： 外文期刊
作者： Li, Qing 1 ; Yang, Bei 2 ; Chen, Xinyu 1 ; Han, Yuting 1 ; Chen, Qin 1 ; He, Shiying 2 ; Feng, Yanfang 2 ; Wu, Yancan 4 ; Liang, Xiaohui 5 ; Xue, Lihong 2 ; Tang, Jie 1 ;
作者机构： 1.Anhui Agr Univ, Coll Resources & Environm, Hefei 230036, Peoples R China
2.Jiangsu Acad Agr Sci, Inst Agr Resources & Environm, Key Lab Agr Environm Lower Reaches Yangtze River, Nanjing 210014, Peoples R China
3.Hohai Univ, Coll Environm, Key Lab Integrated Regulat & Resources Dev Shallow, Minist Educ, Nanjing 210098, Peoples R China
4.HeFei Inspect Ctr Agr Prod Qual Anhui Prov, Hefei 230091, Peoples R China
5.Nanjing Doinpower Technol Co Ltd, Nanjing 211135, Peoples R China
关键词： LaFeO3; Filler; Adsorption; Phosphorus; COD
期刊名称：JOURNAL OF WATER PROCESS ENGINEERING （ 影响因子：6.7； 五年影响因子：6.7 ）
ISSN： 2214-7144
年卷期： 2024 年 66 卷
页码：
收录情况： SCI
摘要： Previous studies have developed numerous adsorption composite materials demonstrating substantial removal efficiencies for phosphorus (P) and chemical oxygen demand (COD). However, most of materials targeted single contaminant and were inconvenient to apply in real water bodies owing to size limitation. In the current study, three composite materials-lanthanum ferrite-modified Quartz balls/Maifan stones/Honeycomb ceramics-were synthesized using one step co-precipitation method. Structural and morphological changes of pre- and post- adsorption were examined through Scanning Electron Microscope- Energy Dispersive Spectrometer (SEMEDS) and X-ray diffraction (XRD). Kinetics, thermodynamics, and isotherm models were simulated for the analysis of P and COD adsorption. X-ray photoelectron spectroscopy (XPS) and Fourier-transform infrared spectroscopy (FTIR) were employed to elucidate the adsorption mechanisms. The results demonstrated that these materials achieved P maximal removal rate of 99.56 % and COD maximal removal rate up to 94.82 %. The second-order kinetic model for P adsorption was more excellent than that of the first-order model, and the intraparticle diffusion model more accurately described the COD adsorption. Both the Langmuir and Freundlich were used to fit the adsorption isotherm data for P and COD. XPS and FTIR revealed that the adsorption mechanisms for P were ligand exchange and chemical precipitation. Whereas the adsorption mechanisms for COD were ligand exchange and physical adsorption. The materials in the actual farmland drainage performed excellent and effectively reduced the concentration of P and COD up to 68.58 % and 53.98 %, respectively. The lanthanum ferrite-modified fillers provide accessible, universal and bifunctional option for controlling agricultural non-point source pollution.
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