Different types of desiccant dehumidifiers work in various ways, but the leading approach they use to extract humidity with the air is both absorption or adsorption. Absorption occurs in the event the desiccant material dissolves as it will take moisture with the air, as is the situation with moisture absorbers. https://dstdehumidifiers.co.uk/case-studies/desiccant-dehumidifiers-in-cold-stores/