From waste to function: spatially resolved synchrotron FTIR mapping of molecular signatures in engineered geopolymer gel (2026)
Abstract
Sulfidic mine wastes pose environmental problems due to acid and metalliferous drainage (AMD). Revalorising these wastes into environmental geopolymers (EGs) offers a sustainable rehabilitation solution. While EGs show promise for strength and contaminant immobilisation, their long-term performance depends on understanding molecular structure. This project will use synchrotron FTIR to investigate chemical bonding and heterogeneity in geopolymer gels. By mapping Si¿O¿Si/Al bonds and precursor¿gel interactions across formulations and conditions, the study will reveal how microstructure influences strength, durability, and leaching resistance. Outcomes will support optimisation of cost-effective EG system for mine rehabilitation, delivering environmental and economic benefits for Australia's mining sectors.
