Preparation of sludge-based activated carbon and its application for phosphorus adsorption
Dehydrated sludge and digested sludge were used as raw materials, ZnCl2, H2SO4 and KOH were used as activators to prepare sludge biochar, with iodine adsorption value as the evaluation index. The results showed that the dehydrated sludge biochar(TSAC) and digested sludge biochar(XHAC) prepared with...
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Editorial Office of Industrial Water Treatment
2024-12-01
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| Series: | Gongye shui chuli |
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| Online Access: | https://www.iwt.cn/CN/10.19965/j.cnki.iwt.2023-1126 |
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| author | HE Zishuai LI Haitao GAO Hong |
| author_facet | HE Zishuai LI Haitao GAO Hong |
| author_sort | HE Zishuai |
| collection | DOAJ |
| description | Dehydrated sludge and digested sludge were used as raw materials, ZnCl2, H2SO4 and KOH were used as activators to prepare sludge biochar, with iodine adsorption value as the evaluation index. The results showed that the dehydrated sludge biochar(TSAC) and digested sludge biochar(XHAC) prepared with ZnCl2 as activator had the highest iodine adsorption values of 355.1 mg/g and 289.2 mg/g, respectively. TSAC and XHAC were applied to phosphorus containing wastewater and compared with commercial activated carbon(CAC). The effects of adsorption time,dosage, and pH on phosphorus adsorption were investigated, and the chemical forms and ecological risks of heavy metals in sludge and TSAC were analyzed. The adsorption mechanism was explored with SEM, XRD, FT-IR, and BET. The results showed that when the adsorption time was 360 min and pH of 6, the adsorption capacity of TSAC and XHAC for phosphorus was 7.3 mg/g and 6.8 mg/g, which was higher than the adsorption capacity of commercial activated carbon(4.1 mg/g). The adsorption process conformed to the Langmuir model and pseudo second-order kinetic equation, and was a chemical adsorption on the surface of a single molecular layer. The potential ecological risk of heavy metals in TSAC was low, while that for sludge was medium, which indicated that the morphological stabilization of heavy metals could be achieved by preparing sludge activated carbon from pyrolysis sludge. |
| format | Article |
| id | doaj-art-a1cde3aff3284c95a8911fbad1ef0250 |
| institution | Kabale University |
| issn | 1005-829X |
| language | zho |
| publishDate | 2024-12-01 |
| publisher | Editorial Office of Industrial Water Treatment |
| record_format | Article |
| series | Gongye shui chuli |
| spelling | doaj-art-a1cde3aff3284c95a8911fbad1ef02502025-01-14T02:07:08ZzhoEditorial Office of Industrial Water TreatmentGongye shui chuli1005-829X2024-12-01441213814610.19965/j.cnki.iwt.2023-11261005-829X（2024）12-0138-09Preparation of sludge-based activated carbon and its application for phosphorus adsorptionHE Zishuai0LI Haitao1GAO Hong2YuXi Agriculture Vocation-Technical College, Yuxi653100, ChinaYuXi Agriculture Vocation-Technical College, Yuxi653100, ChinaFacult of Architectural Engineering, Kunming University of Science and Technology, Kunming650500, ChinaDehydrated sludge and digested sludge were used as raw materials, ZnCl2, H2SO4 and KOH were used as activators to prepare sludge biochar, with iodine adsorption value as the evaluation index. The results showed that the dehydrated sludge biochar(TSAC) and digested sludge biochar(XHAC) prepared with ZnCl2 as activator had the highest iodine adsorption values of 355.1 mg/g and 289.2 mg/g, respectively. TSAC and XHAC were applied to phosphorus containing wastewater and compared with commercial activated carbon(CAC). The effects of adsorption time,dosage, and pH on phosphorus adsorption were investigated, and the chemical forms and ecological risks of heavy metals in sludge and TSAC were analyzed. The adsorption mechanism was explored with SEM, XRD, FT-IR, and BET. The results showed that when the adsorption time was 360 min and pH of 6, the adsorption capacity of TSAC and XHAC for phosphorus was 7.3 mg/g and 6.8 mg/g, which was higher than the adsorption capacity of commercial activated carbon(4.1 mg/g). The adsorption process conformed to the Langmuir model and pseudo second-order kinetic equation, and was a chemical adsorption on the surface of a single molecular layer. The potential ecological risk of heavy metals in TSAC was low, while that for sludge was medium, which indicated that the morphological stabilization of heavy metals could be achieved by preparing sludge activated carbon from pyrolysis sludge.https://www.iwt.cn/CN/10.19965/j.cnki.iwt.2023-1126sludge biocharadsorption of phosphorusecological risk of heavy metals |
| spellingShingle | HE Zishuai LI Haitao GAO Hong Preparation of sludge-based activated carbon and its application for phosphorus adsorption Gongye shui chuli sludge biochar adsorption of phosphorus ecological risk of heavy metals |
| title | Preparation of sludge-based activated carbon and its application for phosphorus adsorption |
| title_full | Preparation of sludge-based activated carbon and its application for phosphorus adsorption |
| title_fullStr | Preparation of sludge-based activated carbon and its application for phosphorus adsorption |
| title_full_unstemmed | Preparation of sludge-based activated carbon and its application for phosphorus adsorption |
| title_short | Preparation of sludge-based activated carbon and its application for phosphorus adsorption |
| title_sort | preparation of sludge based activated carbon and its application for phosphorus adsorption |
| topic | sludge biochar adsorption of phosphorus ecological risk of heavy metals |
| url | https://www.iwt.cn/CN/10.19965/j.cnki.iwt.2023-1126 |
| work_keys_str_mv | AT hezishuai preparationofsludgebasedactivatedcarbonanditsapplicationforphosphorusadsorption AT lihaitao preparationofsludgebasedactivatedcarbonanditsapplicationforphosphorusadsorption AT gaohong preparationofsludgebasedactivatedcarbonanditsapplicationforphosphorusadsorption |