Plaster of Paris (POP) is one of the recalcitrant wastes generated from dentistry and orthopaedic materials used in healthcare sector. The current practice of disposal of POP waste-harbouring biomedical material by incineration is very critical and environmentally unfriendly. The eco-friendly and rapid disintegration of such biomedical-related POP waste was done by treating with ammonium bicarbonate solution (20% w/v ABC) to form non-hazardous products like ammonium sulphate and calcium carbonate in the form of sludge. The ammonium sulphate (NH4)2SO4 is generally used in agriculture as a chemical fertilizer and calcium carbonate (CaCO3) as an additive in construction sector making this process cost-effective and value addition. Interestingly, 20% ABC solution also had significant antibiofilm, antimicrobial activity against fungi, yeast and bacterial strains probably due to its high pH-driven osmotic effect. Therefore, 20% ABC solution finds dual eco-friendly application in disinfection of used POP, especially arising from biomedical waste from patients.
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Authors would like to acknowledge Council of Scientific and Industrial Research (CSIR), India, for financial support and are also grateful to director, CSIR-National Chemical, India, for his constant support and encouragement. GN and KP acknowledge CSIR for fellowship. KG acknowledges University Grants Commission (UGC), New Delhi, for fellowship. This work has been carried out under Societal Programme (CSIR-800) aiming to provide affordable solutions to around 800 million populations in India.
Editorial responsibility: Necip Atar.
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Navale, G.R., Gohil, K.N., Puppala, K.R. et al. Rapid and greener method for utilization of Plaster of Paris (POP) waste generated from biomedical samples. Int. J. Environ. Sci. Technol. 16, 2475–2480 (2019). https://doi.org/10.1007/s13762-018-2070-7
- Plaster of Paris waste
- Biomedical waste
- Eco-friendly disintegration