pH-tuneable simultaneous and selective dye wastewater remediation with digestate-derived biochar: adsorption behaviour, mechanistic insights and potential application
The use of biochar for organic pollutants adsorption has emerged as a key component in wastewater remediation research. In this study, biochar prepared from digestate was subjected to nitric acid functionalization to enhance its adsorption capacity for organic dye mixtures of methylene blue and meth...
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| Format: | Article |
| Language: | English |
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KeAi Communications Co. Ltd.
2025-09-01
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| Series: | Green Chemical Engineering |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666952824000426 |
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| author | Ifunanya R. Akaniro Gaihong Wang Peixin Wang Ruilong Zhang Wenhua Xue Jian Ye Jonathan W.C. Wong Jun Zhao |
| author_facet | Ifunanya R. Akaniro Gaihong Wang Peixin Wang Ruilong Zhang Wenhua Xue Jian Ye Jonathan W.C. Wong Jun Zhao |
| author_sort | Ifunanya R. Akaniro |
| collection | DOAJ |
| description | The use of biochar for organic pollutants adsorption has emerged as a key component in wastewater remediation research. In this study, biochar prepared from digestate was subjected to nitric acid functionalization to enhance its adsorption capacity for organic dye mixtures of methylene blue and methyl red in synthetic wastewater. Based on experimental evidence, modified biochar BC750_NM, with a micro-mesoporous structure and a specific surface area of ∼454.15 m2/g had the best adsorption performance at optimum conditions. This adsorbent exhibited both selective and simultaneous dye adsorption upon pH control, mainly attributable to a multi-interaction process in the medium. Notably, the adsorption of both methylene blue and methyl red approached 90% under acidic pH, while methylene blue was preferentially adsorbed over methyl red at alkaline pH to attain an excellent adsorption rate of 100% for methylene blue. Our approach not only yields a valuable resource for mitigating water pollution but also offers a sustainable solution for digestate management, showcasing the potential for innovative techniques to produce synergistic environmental solutions. |
| format | Article |
| id | doaj-art-dae58ef2a5304a5fa95d74631f431fe6 |
| institution | OA Journals |
| issn | 2666-9528 |
| language | English |
| publishDate | 2025-09-01 |
| publisher | KeAi Communications Co. Ltd. |
| record_format | Article |
| series | Green Chemical Engineering |
| spelling | doaj-art-dae58ef2a5304a5fa95d74631f431fe62025-08-20T02:26:59ZengKeAi Communications Co. Ltd.Green Chemical Engineering2666-95282025-09-016334435610.1016/j.gce.2024.07.001pH-tuneable simultaneous and selective dye wastewater remediation with digestate-derived biochar: adsorption behaviour, mechanistic insights and potential applicationIfunanya R. Akaniro0Gaihong Wang1Peixin Wang2Ruilong Zhang3Wenhua Xue4Jian Ye5Jonathan W.C. Wong6Jun Zhao7Department of Biology, Hong Kong Baptist University, Hong Kong SAR, ChinaDepartment of Biology, Hong Kong Baptist University, Hong Kong SAR, ChinaDepartment of Biology, Hong Kong Baptist University, Hong Kong SAR, ChinaDepartment of Biology, Hong Kong Baptist University, Hong Kong SAR, ChinaDepartment of Biology, Hong Kong Baptist University, Hong Kong SAR, ChinaDepartment of Biology, Hong Kong Baptist University, Hong Kong SAR, ChinaDepartment of Biology, Hong Kong Baptist University, Hong Kong SAR, ChinaDepartment of Biology, Hong Kong Baptist University, Hong Kong SAR, China; Institute of Advanced Materials, Hong Kong Baptist University, Hong Kong SAR, China; Corresponding author.The use of biochar for organic pollutants adsorption has emerged as a key component in wastewater remediation research. In this study, biochar prepared from digestate was subjected to nitric acid functionalization to enhance its adsorption capacity for organic dye mixtures of methylene blue and methyl red in synthetic wastewater. Based on experimental evidence, modified biochar BC750_NM, with a micro-mesoporous structure and a specific surface area of ∼454.15 m2/g had the best adsorption performance at optimum conditions. This adsorbent exhibited both selective and simultaneous dye adsorption upon pH control, mainly attributable to a multi-interaction process in the medium. Notably, the adsorption of both methylene blue and methyl red approached 90% under acidic pH, while methylene blue was preferentially adsorbed over methyl red at alkaline pH to attain an excellent adsorption rate of 100% for methylene blue. Our approach not only yields a valuable resource for mitigating water pollution but also offers a sustainable solution for digestate management, showcasing the potential for innovative techniques to produce synergistic environmental solutions.http://www.sciencedirect.com/science/article/pii/S2666952824000426Co-adsorptionDye wastewaterOrganic pollutantsSelective adsorptionWastewater treatment |
| spellingShingle | Ifunanya R. Akaniro Gaihong Wang Peixin Wang Ruilong Zhang Wenhua Xue Jian Ye Jonathan W.C. Wong Jun Zhao pH-tuneable simultaneous and selective dye wastewater remediation with digestate-derived biochar: adsorption behaviour, mechanistic insights and potential application Green Chemical Engineering Co-adsorption Dye wastewater Organic pollutants Selective adsorption Wastewater treatment |
| title | pH-tuneable simultaneous and selective dye wastewater remediation with digestate-derived biochar: adsorption behaviour, mechanistic insights and potential application |
| title_full | pH-tuneable simultaneous and selective dye wastewater remediation with digestate-derived biochar: adsorption behaviour, mechanistic insights and potential application |
| title_fullStr | pH-tuneable simultaneous and selective dye wastewater remediation with digestate-derived biochar: adsorption behaviour, mechanistic insights and potential application |
| title_full_unstemmed | pH-tuneable simultaneous and selective dye wastewater remediation with digestate-derived biochar: adsorption behaviour, mechanistic insights and potential application |
| title_short | pH-tuneable simultaneous and selective dye wastewater remediation with digestate-derived biochar: adsorption behaviour, mechanistic insights and potential application |
| title_sort | ph tuneable simultaneous and selective dye wastewater remediation with digestate derived biochar adsorption behaviour mechanistic insights and potential application |
| topic | Co-adsorption Dye wastewater Organic pollutants Selective adsorption Wastewater treatment |
| url | http://www.sciencedirect.com/science/article/pii/S2666952824000426 |
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