Activated carbon (AC) and modified AC were tested as solid sorbents for Rare Earths (REs) recovery from Electronic Waste. The modified AC was synthesized by loading Pentaethylenehexamine and the amount of loaded polymer was estimated by COD analysis of the residual amount in solution. The AC and the modified AC were contacted with lanthanum solutions (chosen as representing element of REs family) and the lanthanum adsorbed by the solids was analyzed by ICP-OES of the contacted solution. Finally, release tests were performed on the different samples in order to verify the solids capability not only to capture but also to recover metal ions. The obtained results showed that the experimental procedure was appropriate to load the polymer onto the AC and that the modification of the AC improved both adsorption (from 44% to 100%) and release (from 65% to 91%) with respect to natural AC, ensuring a global recovery efficiency of 90%.

Solid sorbents for rare earths recovery from electronic Waste

IANNICELLI ZUBIANI, ELENA MARIA;CRISTIANI, CINZIA;DOTELLI, GIOVANNI;GALLO STAMPINO, PAOLA
2015-01-01

Abstract

Activated carbon (AC) and modified AC were tested as solid sorbents for Rare Earths (REs) recovery from Electronic Waste. The modified AC was synthesized by loading Pentaethylenehexamine and the amount of loaded polymer was estimated by COD analysis of the residual amount in solution. The AC and the modified AC were contacted with lanthanum solutions (chosen as representing element of REs family) and the lanthanum adsorbed by the solids was analyzed by ICP-OES of the contacted solution. Finally, release tests were performed on the different samples in order to verify the solids capability not only to capture but also to recover metal ions. The obtained results showed that the experimental procedure was appropriate to load the polymer onto the AC and that the modification of the AC improved both adsorption (from 44% to 100%) and release (from 65% to 91%) with respect to natural AC, ensuring a global recovery efficiency of 90%.
Selected papers from the 3rd Edition of the International Conference on Wastes: Solutions, Treatments and Opportunities
9781138028821
File in questo prodotto:
File Dimensione Formato  
IannicelliZubiani2015.pdf

Accesso riservato

: Post-Print (DRAFT o Author’s Accepted Manuscript-AAM)
Dimensione 365.84 kB
Formato Adobe PDF
365.84 kB Adobe PDF   Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11311/990408
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 2
  • ???jsp.display-item.citation.isi??? ND
social impact