Characterisation of major component leaching and buffering capacity of RDF incineration and gasification bottom ash in relation to reuse or disposal scenarios

► Analysis of RDF incineration and gasification bottom ash. ► Evaluation of total composition, mineralogy, buffering capacity and leaching. ► New geochemical modelling approach based on mineralogy and bulk composition. ► The two materials presented a different environmental behavior. ► Only a limited amount of mineral phases showed to be available for leaching.