Immobilization of Heavy Metals Present in Biomedical Waste Ash by Using Sulphur Based Geopolymer Concrete – A ReviewA. Suresh Kumar, K. Vijay Sankar, S. Pream Kumar, M. Rithika Sivasankari, M. Muthuselvan and S. LokeshE3S Web Conf., 648 (2025) 02007DOI: https://doi.org/10.1051/e3sconf/202564802007