Solid residues from Municipal Solid Waste Incinerators (MSWI) may represent an unconventional source of REE and other critical raw materials as defined by the European Commission. In this contribution we present the total REE content in bottom and fly ashes, which are the common MSWI outputs, and their estimated annual flow are significant. Samples were digested with sodium peroxide sintering which is highly effective analytical technique and the analysis was performed with ICP‐MS. Bottom and fly ashes have an average concentration of 103 and 54 mg/kg ƩREY, respectively. For fly ashes the expected annual flow is 1.1 t/a LREE and 0.3 t/a HREE, whereas for bottom ashes is 22.5 t/a LREE and 5.2 t/a HREE. Moreover, we show that simple magnetic susceptibility measurements can be a promising prospecting method when exploring for REE in urban ores is concerned.
The REE potential in “urban” ore deposits: an evaluation on contents and prospecting tools from Italian municipal solid waste incinerators
FUNARI, VALERIO;BRAGA, ROBERTO
2014
Abstract
Solid residues from Municipal Solid Waste Incinerators (MSWI) may represent an unconventional source of REE and other critical raw materials as defined by the European Commission. In this contribution we present the total REE content in bottom and fly ashes, which are the common MSWI outputs, and their estimated annual flow are significant. Samples were digested with sodium peroxide sintering which is highly effective analytical technique and the analysis was performed with ICP‐MS. Bottom and fly ashes have an average concentration of 103 and 54 mg/kg ƩREY, respectively. For fly ashes the expected annual flow is 1.1 t/a LREE and 0.3 t/a HREE, whereas for bottom ashes is 22.5 t/a LREE and 5.2 t/a HREE. Moreover, we show that simple magnetic susceptibility measurements can be a promising prospecting method when exploring for REE in urban ores is concerned.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
