Academic Journal
Effect of desalination of Sargassum algae on its potential use as a stabilizer in sustainable earth-based bricks
| العنوان: | Effect of desalination of Sargassum algae on its potential use as a stabilizer in sustainable earth-based bricks |
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| المؤلفون: | Stanislas, Tido Tiwa, Bilba, Ketty, Potiron, Cristel Onésippe, Arsène, Marie-Ange |
| المساهمون: | Connaissance et Valorisation : Chimie des Matériaux, Environnement, Energie URp4_2 (COVACHIM- M2E), Université des Antilles (UA), Laboratoire Energétique Mécanique Electromagnétisme (LEME), Université Paris Nanterre (UPN) |
| المصدر: | ISSN: 2211-9264 ; Algal Research - Biomass, Biofuels and Bioproducts ; https://hal.univ-antilles.fr/hal-04665636 ; Algal Research - Biomass, Biofuels and Bioproducts, 2024, 82, pp.103625. ⟨10.1016/j.algal.2024.103625⟩. |
| بيانات النشر: | HAL CCSD Elsevier |
| سنة النشر: | 2024 |
| المجموعة: | Université des Antilles (UAG): HAL |
| مصطلحات موضوعية: | Pelagic Sargassum algae, Sargassum ash Earth-based brick, Desalination, Chemical and mineral composition, Earth-based brick, [CHIM]Chemical Sciences |
| الوصف: | International audience ; Since 2011, Caribbean beaches have been flooded by massive quantities of pelagic Sargassum, causing environmental,health and financial problems. The use of Sargassum ash as a stabilizer in the manufacture of brickscan help mitigate the economic impact of Sargassum grounding by adding value. This study assesses the effect ofthe Pelagic Sargassum algae desalination process on the properties of the biomass as well as the potentialapplication of their ash as a stabilizer in soil-based bricks. Fresh Sargassum algae was subjected to two cycles ofimmersion in water, then calcined under different conditions (temperature and time) and characterized. Thedesalinated Sargassum ash (SA) was used to partially replace cement in the stabilization of earth bricks. Characterizationof raw and desalted Sargassum shows a reduction in ash content from 28.44 to 17.25 % afterdesalination. Furthermore, the thermo gravimetric analysis show a slight reduction in the initial degradationtemperature between 204 and 602 ◦C, which is associated with a reduction in the amount of residual char from35 % to 27 %. The results of the XRF analysis of the SA showed a very low alumiosilica content (SiO3 + Al2O3 <4 %), but a significant increase in CaO content after desalination from 21.96 to 50.17 %. The XRD results of theSA are consistent with the XRF analysis which reveals that the desalination process significantly increased theCaCO3 content from 19 to 67 %, while KCl decreased significantly from 26 to 8 %. Furthermore, the characterizationof the composites reveal that partial substitution of 10 wt% cement by SA calcined at 700 ◦C for 2 h hasno significant effect on water absorption, density, compressive strength and chemical composition of earthbricks. This material could help reduce pollution linked to the decomposition of sargassum on Caribbean coastsand beaches, as well as greenhouse gas emissions linked to cement production. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| Relation: | hal-04665636; https://hal.univ-antilles.fr/hal-04665636 |
| DOI: | 10.1016/j.algal.2024.103625 |
| الاتاحة: | https://hal.univ-antilles.fr/hal-04665636 https://doi.org/10.1016/j.algal.2024.103625 |
| رقم الانضمام: | edsbas.84633D71 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1016/j.algal.2024.103625 |
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