Adsorption of COD and Ammonia Nitrogen in Landfill Leachate on Red Mud Modified by Sulfonation Coupling
Using polysodium p-styrene sulfonate and silane coupling agent (KH560) as modifiers, red mud was modified by sulfonation and coupling, and used in the adsorption treatment of landfill leachate. The effects of pH value, dosage of adsorbent, adsorption time and reaction temperature on the adsorption o...
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Institute of Multipurpose Utilization of Mineral Resources, Chinese Academy of Geological Sciences
2025-08-01
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| Series: | Kuangchan zonghe liyong |
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| Online Access: | http://www.kczhly.com/en/article/doi/10.12476/kczhly.202307020358 |
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| _version_ | 1849224556596690944 |
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| author | Mingqin HUANG Shenwen CAI Junwei CHENG Boping ZENG |
| author_facet | Mingqin HUANG Shenwen CAI Junwei CHENG Boping ZENG |
| author_sort | Mingqin HUANG |
| collection | DOAJ |
| description | Using polysodium p-styrene sulfonate and silane coupling agent (KH560) as modifiers, red mud was modified by sulfonation and coupling, and used in the adsorption treatment of landfill leachate. The effects of pH value, dosage of adsorbent, adsorption time and reaction temperature on the adsorption of COD and ammonia nitrogen were studied. The modified red mud was characterized by infrared spectroscopy and scanning electron microscope and the isotherm, kinetic and thermodynamic of adsorption were also discussed. The results showed that the adsorption effect of red mud modified by sulfonation coupling (SCRM) on COD and ammonia nitrogen in leachate was significantly improved. At the conditions of pH value 8, dosage of 60 g/L, adsorption time of 90 min and reaction temperature of 20 ℃, the equilibrium adsorption capacity of COD and ammonia nitrogen were 81.51 mg/g and 19.24 mg/g, and the removal rate reached 87.57% and 72.05%, respectively. The pore structure of red mud particles changed from shallow pores to penetrating pores, and obvious sulfonated characteristic groups appeared after modification. The adsorption of COD and ammonia nitrogen by SCRM belonged to monolayer adsorption and multilayer adsorption, respectively. The adsorption kinetics of the two adsorption processes were more consistent with the pseudo-second-order kinetic model, and both were endothermic and entropic spontaneous reaction processes. |
| format | Article |
| id | doaj-art-f54bf7b8b6b3423a9dbaf954d6b3a39d |
| institution | Kabale University |
| issn | 1000-6532 |
| language | zho |
| publishDate | 2025-08-01 |
| publisher | Institute of Multipurpose Utilization of Mineral Resources, Chinese Academy of Geological Sciences |
| record_format | Article |
| series | Kuangchan zonghe liyong |
| spelling | doaj-art-f54bf7b8b6b3423a9dbaf954d6b3a39d2025-08-25T08:13:18ZzhoInstitute of Multipurpose Utilization of Mineral Resources, Chinese Academy of Geological SciencesKuangchan zonghe liyong1000-65322025-08-0146417518310.12476/kczhly.2023070203582025-04huangmingqinAdsorption of COD and Ammonia Nitrogen in Landfill Leachate on Red Mud Modified by Sulfonation CouplingMingqin HUANG0Shenwen CAI1Junwei CHENG2Boping ZENG3Zunyi Normal University, Zunyi, Guizhou 563006, ChinaZunyi Normal University, Zunyi, Guizhou 563006, ChinaZunyi Normal University, Zunyi, Guizhou 563006, ChinaZunyi Normal University, Zunyi, Guizhou 563006, ChinaUsing polysodium p-styrene sulfonate and silane coupling agent (KH560) as modifiers, red mud was modified by sulfonation and coupling, and used in the adsorption treatment of landfill leachate. The effects of pH value, dosage of adsorbent, adsorption time and reaction temperature on the adsorption of COD and ammonia nitrogen were studied. The modified red mud was characterized by infrared spectroscopy and scanning electron microscope and the isotherm, kinetic and thermodynamic of adsorption were also discussed. The results showed that the adsorption effect of red mud modified by sulfonation coupling (SCRM) on COD and ammonia nitrogen in leachate was significantly improved. At the conditions of pH value 8, dosage of 60 g/L, adsorption time of 90 min and reaction temperature of 20 ℃, the equilibrium adsorption capacity of COD and ammonia nitrogen were 81.51 mg/g and 19.24 mg/g, and the removal rate reached 87.57% and 72.05%, respectively. The pore structure of red mud particles changed from shallow pores to penetrating pores, and obvious sulfonated characteristic groups appeared after modification. The adsorption of COD and ammonia nitrogen by SCRM belonged to monolayer adsorption and multilayer adsorption, respectively. The adsorption kinetics of the two adsorption processes were more consistent with the pseudo-second-order kinetic model, and both were endothermic and entropic spontaneous reaction processes.http://www.kczhly.com/en/article/doi/10.12476/kczhly.202307020358red mudsulfonation couplingadsorptioncodammonia nitrogen |
| spellingShingle | Mingqin HUANG Shenwen CAI Junwei CHENG Boping ZENG Adsorption of COD and Ammonia Nitrogen in Landfill Leachate on Red Mud Modified by Sulfonation Coupling Kuangchan zonghe liyong red mud sulfonation coupling adsorption cod ammonia nitrogen |
| title | Adsorption of COD and Ammonia Nitrogen in Landfill Leachate on Red Mud Modified by Sulfonation Coupling |
| title_full | Adsorption of COD and Ammonia Nitrogen in Landfill Leachate on Red Mud Modified by Sulfonation Coupling |
| title_fullStr | Adsorption of COD and Ammonia Nitrogen in Landfill Leachate on Red Mud Modified by Sulfonation Coupling |
| title_full_unstemmed | Adsorption of COD and Ammonia Nitrogen in Landfill Leachate on Red Mud Modified by Sulfonation Coupling |
| title_short | Adsorption of COD and Ammonia Nitrogen in Landfill Leachate on Red Mud Modified by Sulfonation Coupling |
| title_sort | adsorption of cod and ammonia nitrogen in landfill leachate on red mud modified by sulfonation coupling |
| topic | red mud sulfonation coupling adsorption cod ammonia nitrogen |
| url | http://www.kczhly.com/en/article/doi/10.12476/kczhly.202307020358 |
| work_keys_str_mv | AT mingqinhuang adsorptionofcodandammonianitrogeninlandfillleachateonredmudmodifiedbysulfonationcoupling AT shenwencai adsorptionofcodandammonianitrogeninlandfillleachateonredmudmodifiedbysulfonationcoupling AT junweicheng adsorptionofcodandammonianitrogeninlandfillleachateonredmudmodifiedbysulfonationcoupling AT bopingzeng adsorptionofcodandammonianitrogeninlandfillleachateonredmudmodifiedbysulfonationcoupling |