Production of magnetic sewage sludge biochar: investigation of the activation mechanism and effect of the activating agent and temperature
dc.contributor.author | Sierra García, Irene ![]() | |
dc.contributor.author | Iriarte Velasco, Unai | |
dc.contributor.author | Ayastuy Arizti, José Luis | |
dc.contributor.author | Aguayo Urquijo, Andrés Tomás ![]() | |
dc.date.accessioned | 2024-02-08T10:03:07Z | |
dc.date.available | 2024-02-08T10:03:07Z | |
dc.date.issued | 2022-02-11 | |
dc.identifier.citation | Biomass Conversion and Biorefinery 13 : 17101-17118 (2023) | |
dc.identifier.issn | 2190-6823 | |
dc.identifier.uri | http://hdl.handle.net/10810/65195 | |
dc.description.abstract | Sewage sludge-based porous materials were prepared through an integrated and energy-saving procedure that combines chemical activation with an alkali (NaOH or K2CO3) and physical activation with CO2 in a single step. The study was conducted in a wide temperature range (600–1000 °C), using higher temperatures than those commonly used. From the standpoint of textural properties, the impregnation results in a decrease in the optimum activation temperature: 800 °C for untreated samples, and 600–700 °C for impregnated samples. The impregnation increases the amount of –OH and –NH functional groups, and it also leads to the generation of new oxygen- and/or nitrogen-containing functionalities (above 800 °C for the impregnation with K2CO3 and in the whole temperature range for the impregnation with NaOH). The chemical treatment favors the development of magnetic properties on biochars, which is an advantage for its reuse in wastewater treatment, since it favors the removal of anionic surfactants and heavy metals such as lead, copper, zinc, and manganese. The uptake of phenol and methylene blue (MB) is maximized with the combination of the impregnation (with NaOH for phenol and K2CO3 for MB) and the use of a moderate temperature (600–700 °C). The optimum uptake values represent an increase of 87% and 152% for MB and phenol, respectively, compared to the highest value of non-impregnated samples (activated at 800 °C), with the advantage of the lower temperature required. | es_ES |
dc.description.sponsorship | Open Access funding provided thanks to the CRUE-CSIC agreement with Springer Nature. This work was supported by the Basque Government (UFI 11/39 (UPV/EHU) and S-PE13UN100 project). | |
dc.language.iso | eng | es_ES |
dc.publisher | Spring Nature | |
dc.rights | info:eu-repo/semantics/openAccess | es_ES |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/ | * |
dc.subject | sewage sludge | es_ES |
dc.subject | carbon dioxide | |
dc.subject | alkali activation | |
dc.subject | phenol | |
dc.subject | methylene blue | |
dc.subject | biochar | |
dc.title | Production of magnetic sewage sludge biochar: investigation of the activation mechanism and effect of the activating agent and temperature | es_ES |
dc.type | info:eu-repo/semantics/article | es_ES |
dc.rights.holder | (cc) 2022 The Authors. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. | * |
dc.relation.publisherversion | https://link.springer.com/article/10.1007/s13399-022-02372-w | |
dc.identifier.doi | 10.1007/s13399-022-02372-w | |
dc.departamentoes | Ingeniería química | es_ES |
dc.departamentoeu | Ingeniaritza kimikoa | es_ES |
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Except where otherwise noted, this item's license is described as (cc) 2022 The Authors. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made.