Preparation of efficient and reusable lanthanum and iron co-modified soda residue for selective phosphate removal from domestic sewage
Abstract The selection of suitable raw materials as adsorbents is a key factor in effectively removing phosphorus from water. As an industrial by-product, soda residue exhibits high porosity and surface area, which can effectively adsorb pollutants. Magnetic lanthanum-iron soda residue (La-Fe-CSR) w...
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Nature Portfolio
2025-01-01
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| Online Access: | https://doi.org/10.1038/s41598-025-87754-6 |
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| author | Huiteng Wang Hui Luo Rubin Han Wenbo Wu Jing Yang Teng Qin Limin Chen Meng Liu Bao-Jie He Zhaoqian Jing |
| author_facet | Huiteng Wang Hui Luo Rubin Han Wenbo Wu Jing Yang Teng Qin Limin Chen Meng Liu Bao-Jie He Zhaoqian Jing |
| author_sort | Huiteng Wang |
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| description | Abstract The selection of suitable raw materials as adsorbents is a key factor in effectively removing phosphorus from water. As an industrial by-product, soda residue exhibits high porosity and surface area, which can effectively adsorb pollutants. Magnetic lanthanum-iron soda residue (La-Fe-CSR) was synthesized using the co-precipitation method, and its characterization and mechanism for removing phosphate were thoroughly investigated. La-Fe-CSR exhibited good adsorption performance under acidic conditions (3 < pH < 7). A high concentration of HCO3 − (100 mg/L) reduced the adsorption performance of La-Fe-CSR by 8.3% ± 2.5%, whereas the presence of other coexisting ions had a smaller impact. The adsorption of phosphate by La-Fe-CSR was controlled by chemisorption and reached saturation after approximately 120 min. The phosphate adsorption by La-Fe-CSR was significantly higher than that of soda residue (43.65 ± 3.39 mg/g), reaching 74.87 ± 2.46 mg/g. Ligand exchange and inner-sphere complexation constituted the primary mechanisms through which L-Fe-CSR removed phosphate. After 5 consecutive cycles, La-Fe-CSR maintained a phosphate removal efficiency of 74.5 ± 1.6%. It demonstrated good performance in removing total phosphorus from real domestic sewage, with a removal rate of 94.9 ± 0.5%. These research findings demonstrated that La-Fe-CSR held significant promise as a highly effective phosphate adsorbent in practical applications. |
| format | Article |
| id | doaj-art-b19085a817de451c968b0e4b7d2cfcd3 |
| institution | Kabale University |
| issn | 2045-2322 |
| language | English |
| publishDate | 2025-01-01 |
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| spelling | doaj-art-b19085a817de451c968b0e4b7d2cfcd32025-01-26T12:27:33ZengNature PortfolioScientific Reports2045-23222025-01-0115111610.1038/s41598-025-87754-6Preparation of efficient and reusable lanthanum and iron co-modified soda residue for selective phosphate removal from domestic sewageHuiteng Wang0Hui Luo1Rubin Han2Wenbo Wu3Jing Yang4Teng Qin5Limin Chen6Meng Liu7Bao-Jie He8Zhaoqian Jing9School of Civil and Ocean Engineering, Jiangsu Ocean UniversitySchool of Civil and Ocean Engineering, Jiangsu Ocean UniversitySchool of Civil and Ocean Engineering, Jiangsu Ocean UniversitySchool of Civil and Ocean Engineering, Jiangsu Ocean UniversitySchool of Civil and Ocean Engineering, Jiangsu Ocean UniversitySchool of Civil and Ocean Engineering, Jiangsu Ocean UniversitySchool of Civil and Ocean Engineering, Jiangsu Ocean UniversitySchool of Civil and Ocean Engineering, Jiangsu Ocean UniversityCentre for Climate-Resilient and Low-Carbon Cities, School of Architecture and Urban Planning, Chongqing UniversityCollege of Civil Engineering, Nanjing Forestry UniversityAbstract The selection of suitable raw materials as adsorbents is a key factor in effectively removing phosphorus from water. As an industrial by-product, soda residue exhibits high porosity and surface area, which can effectively adsorb pollutants. Magnetic lanthanum-iron soda residue (La-Fe-CSR) was synthesized using the co-precipitation method, and its characterization and mechanism for removing phosphate were thoroughly investigated. La-Fe-CSR exhibited good adsorption performance under acidic conditions (3 < pH < 7). A high concentration of HCO3 − (100 mg/L) reduced the adsorption performance of La-Fe-CSR by 8.3% ± 2.5%, whereas the presence of other coexisting ions had a smaller impact. The adsorption of phosphate by La-Fe-CSR was controlled by chemisorption and reached saturation after approximately 120 min. The phosphate adsorption by La-Fe-CSR was significantly higher than that of soda residue (43.65 ± 3.39 mg/g), reaching 74.87 ± 2.46 mg/g. Ligand exchange and inner-sphere complexation constituted the primary mechanisms through which L-Fe-CSR removed phosphate. After 5 consecutive cycles, La-Fe-CSR maintained a phosphate removal efficiency of 74.5 ± 1.6%. It demonstrated good performance in removing total phosphorus from real domestic sewage, with a removal rate of 94.9 ± 0.5%. These research findings demonstrated that La-Fe-CSR held significant promise as a highly effective phosphate adsorbent in practical applications.https://doi.org/10.1038/s41598-025-87754-6Soda residueCalcinationLanthanumPhosphate adsorptionMagnetizationDomestic sewage |
| spellingShingle | Huiteng Wang Hui Luo Rubin Han Wenbo Wu Jing Yang Teng Qin Limin Chen Meng Liu Bao-Jie He Zhaoqian Jing Preparation of efficient and reusable lanthanum and iron co-modified soda residue for selective phosphate removal from domestic sewage Scientific Reports Soda residue Calcination Lanthanum Phosphate adsorption Magnetization Domestic sewage |
| title | Preparation of efficient and reusable lanthanum and iron co-modified soda residue for selective phosphate removal from domestic sewage |
| title_full | Preparation of efficient and reusable lanthanum and iron co-modified soda residue for selective phosphate removal from domestic sewage |
| title_fullStr | Preparation of efficient and reusable lanthanum and iron co-modified soda residue for selective phosphate removal from domestic sewage |
| title_full_unstemmed | Preparation of efficient and reusable lanthanum and iron co-modified soda residue for selective phosphate removal from domestic sewage |
| title_short | Preparation of efficient and reusable lanthanum and iron co-modified soda residue for selective phosphate removal from domestic sewage |
| title_sort | preparation of efficient and reusable lanthanum and iron co modified soda residue for selective phosphate removal from domestic sewage |
| topic | Soda residue Calcination Lanthanum Phosphate adsorption Magnetization Domestic sewage |
| url | https://doi.org/10.1038/s41598-025-87754-6 |
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