ArticleRSC advances2026
Hydrothermally tailored high-basalt geopolymer for strength development and indigo carmine removal.
Article in RSC advances, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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10 authors.
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Abstract
The development of sustainable multifunctional construction materials capable of simultaneously providing structural performance and environmental remediation has attracted considerable research interest. In this study, a low-carbon alkali-activated geopolymer was synthesized using an equal proportion of ground granulated blast-furnace slag (GGBFS) and Egyptian natural basalt as aluminosilicate precursors. The influence of NaOH concentration (5 and 10 wt%) and curing regime (ambient curing and hydrothermal treatment at 150 °C for 3-24 h) on the fresh, mechanical, phase, morphological, and textural characteristics of the developed composites was systematically investigated. Hydrothermal curing markedly enhanced geopolymerization, promoted pore refinement, and induced the formation of crystalline calcium aluminosilicate hydrate and zeolitic phases, resulting in a maximum compressive strength of 53.3 MPa for the Geo-BT5/H composite after 12 h of autoclaving. Owing to its superior mechanical integrity, well-developed meso-porosity, and low production cost, Geo-BT5/H was selected as an adsorbent for Indigo Carmine (IC) removal from aqueous solutions. Adsorption was strongly pH-dependent, exhibiting maximum performance under acidic conditions (pH ≈ 2), while adsorption capacity increased with both initial dye concentration and temperature. The BET analysis confirmed the transformation of the pore structure from a Type III to a Type IV/H3 mesoporous network with a specific surface area of 30.91 m
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