Kinetic Investigation of Tobermorite Synthesis for the Recovery of Carcinogenic Respirable Crystalline Silica (RCS).

ABSTRACT: Respirable crystalline silica (RCS), a hazardous byproduct of quartzite processing, poses severe occupational and environmental health risks. To address both waste valorization and health concerns, this study developed an end-of-waste strategy for converting quartz-rich quarry dust (QD) into substituted tobermorite under mild hydrothermal conditions. A systematic series of syntheses was carried out at 120, 130, and 140 °C under dynamic conditions using controlled mixtures composed of QD together with KRY·AS (a material derived from the thermal inertization of cement asbestos) or CaO as calcium sources and a small amount (2.5 wt %) of phillipsite-rich zeolitic tuff as a catalytic additive. Crystallization pathways and reaction kinetics were analyzed through X-ray diffraction, scanning elect

SUBMITTER: Malferrari D 

PROVIDER: S-EPMC12593074 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature