Valorization of Silicon-Rich Solid Waste into Highly Active Silicate Adsorbents for Heavy Metal Removal.

ABSTRACT: Waste stone powder is a major solid waste byproduct of stone operations. This study developed a novel "alkali activation-calcination" process that efficiently converts waste stone powder into high-value-added silicon-based materials (SSM). This study elucidated the morphological evolution of silicon during the conversion process and revealed the formation mechanism of active silicon. Through further integration of batch adsorption experiments and multi-technique characterization analysis, the immobilization efficacy of this material for heavy metals cadmium/lead was elucidated, revealing both direct and indirect interfacial reaction mechanisms. The results demonstrate that in-creasing the calcination temperature, alkali activator concentration, and calcination duration enhances the reactiv

SUBMITTER: Jiang S 

PROVIDER: S-EPMC12737291 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature