Spent coffee ground biochar for phosphate adsorption in water: Influence of pyrolysis temperature and iron-coating activation method
A substantial portion of the phosphorus utilized in crop and food production is dispersed into soil and water, posing a challenge to the management of eutrophication and sustainable nutrient recovery. This research focuses on the reclamation of phosphate from polluted water through affinitive adsorp...
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Elsevier
2024-12-01
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| Series: | Cleaner Engineering and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666790824001198 |
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| author | Alessia Torboli Paola Foladori Mingming Lu Stefano Gialanella Lorena Maines |
| author_facet | Alessia Torboli Paola Foladori Mingming Lu Stefano Gialanella Lorena Maines |
| author_sort | Alessia Torboli |
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| description | A substantial portion of the phosphorus utilized in crop and food production is dispersed into soil and water, posing a challenge to the management of eutrophication and sustainable nutrient recovery. This research focuses on the reclamation of phosphate from polluted water through affinitive adsorption on biochar derived from spent coffee grounds (SCG). SCG were subjected to pyrolysis within a N2-purged vertical furnace across a temperature range of 300–550 °C, with a 1-h holding time. The adsorption capability of SCG biochar was systematically investigated and experimental data were interpreted using Langmuir and Freundlich isotherm models. Notably, the biochar pyrolyzed at 450 °C and activated with a Fe/biochar mass ratio of 2:1 demonstrated the highest adsorption capacity (0.87 mg P/g biochar) when exposed to the highest initial phosphate concentration in the solution (15 mg P/L). Comparative analyses revealed that the removal efficiency of non-activated SCG biochar was considerably lower (5.7%) compared to the corresponding activated biochar (up to 17.3%). This highlights the significant increase in adsorption capacity facilitated by the introduction of ferric chloride. Furthermore, phosphate desorption experiments were conducted to assess the biochar's phosphorus release characteristics and stability. The results demonstrate the positive outcomes of upcycling SCG waste material as a pollutant sorbent and the potential to diminish reliance on chemical fertilizers through the recovery of Fe-phosphate-enriched SCG biochar. |
| format | Article |
| id | doaj-art-69d7ed4578bc4beabc4e54f6fdc8ebf1 |
| institution | Kabale University |
| issn | 2666-7908 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Elsevier |
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| series | Cleaner Engineering and Technology |
| spelling | doaj-art-69d7ed4578bc4beabc4e54f6fdc8ebf12024-12-19T11:01:13ZengElsevierCleaner Engineering and Technology2666-79082024-12-0123100839Spent coffee ground biochar for phosphate adsorption in water: Influence of pyrolysis temperature and iron-coating activation methodAlessia Torboli0Paola Foladori1Mingming Lu2Stefano Gialanella3Lorena Maines4Department of Civil, Environmental and Mechanical Engineering, University of Trento, via Mesiano 77, 38123, Trento, Italy; Corresponding author.Department of Civil, Environmental and Mechanical Engineering, University of Trento, via Mesiano 77, 38123, Trento, ItalyCollege of Engineering and Applied Science, University of Cincinnati, 2901 Woodside Drive, Cincinnati, OH, 45221, United StatesDepartment of Industrial Engineering, University of Trento, via Sommarive 9, 38123, Trento, ItalyDepartment of Industrial Engineering, University of Trento, via Sommarive 9, 38123, Trento, ItalyA substantial portion of the phosphorus utilized in crop and food production is dispersed into soil and water, posing a challenge to the management of eutrophication and sustainable nutrient recovery. This research focuses on the reclamation of phosphate from polluted water through affinitive adsorption on biochar derived from spent coffee grounds (SCG). SCG were subjected to pyrolysis within a N2-purged vertical furnace across a temperature range of 300–550 °C, with a 1-h holding time. The adsorption capability of SCG biochar was systematically investigated and experimental data were interpreted using Langmuir and Freundlich isotherm models. Notably, the biochar pyrolyzed at 450 °C and activated with a Fe/biochar mass ratio of 2:1 demonstrated the highest adsorption capacity (0.87 mg P/g biochar) when exposed to the highest initial phosphate concentration in the solution (15 mg P/L). Comparative analyses revealed that the removal efficiency of non-activated SCG biochar was considerably lower (5.7%) compared to the corresponding activated biochar (up to 17.3%). This highlights the significant increase in adsorption capacity facilitated by the introduction of ferric chloride. Furthermore, phosphate desorption experiments were conducted to assess the biochar's phosphorus release characteristics and stability. The results demonstrate the positive outcomes of upcycling SCG waste material as a pollutant sorbent and the potential to diminish reliance on chemical fertilizers through the recovery of Fe-phosphate-enriched SCG biochar.http://www.sciencedirect.com/science/article/pii/S2666790824001198BiocharIron-coated biomassPhosphate adsorptionSpent coffee groundsWaste upcycleWater purification |
| spellingShingle | Alessia Torboli Paola Foladori Mingming Lu Stefano Gialanella Lorena Maines Spent coffee ground biochar for phosphate adsorption in water: Influence of pyrolysis temperature and iron-coating activation method Cleaner Engineering and Technology Biochar Iron-coated biomass Phosphate adsorption Spent coffee grounds Waste upcycle Water purification |
| title | Spent coffee ground biochar for phosphate adsorption in water: Influence of pyrolysis temperature and iron-coating activation method |
| title_full | Spent coffee ground biochar for phosphate adsorption in water: Influence of pyrolysis temperature and iron-coating activation method |
| title_fullStr | Spent coffee ground biochar for phosphate adsorption in water: Influence of pyrolysis temperature and iron-coating activation method |
| title_full_unstemmed | Spent coffee ground biochar for phosphate adsorption in water: Influence of pyrolysis temperature and iron-coating activation method |
| title_short | Spent coffee ground biochar for phosphate adsorption in water: Influence of pyrolysis temperature and iron-coating activation method |
| title_sort | spent coffee ground biochar for phosphate adsorption in water influence of pyrolysis temperature and iron coating activation method |
| topic | Biochar Iron-coated biomass Phosphate adsorption Spent coffee grounds Waste upcycle Water purification |
| url | http://www.sciencedirect.com/science/article/pii/S2666790824001198 |
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