Dehydration of gypsum waste to recyclable anhydrite using a nano-film reservoir under ambient conditions
Chunli Wang, Wenjing Li, Chunli Gou, Zhihao Zhang, Zhang Lin, Jing Zhang
Abstract
A 39 nm thick sulfuric acid film (NSF) with extremely low water activity was deposited on gypsum particles to enable the phase transformation from gypsum to anhydrite via recrystallization at room temperature.
Topics & Concepts
AnhydriteGypsumRecrystallization (geology)Sulfuric acidDehydrationChemical engineeringMaterials scienceSulfateNano-MineralogyChemistryMetallurgyGeologyComposite materialBiochemistryPaleontologyEngineeringMine drainage and remediation techniquesMetal Extraction and BioleachingCalcium Carbonate Crystallization and Inhibition