Abstract

Heavy metals retention [Pb2+; Cd2+; Ni2+ and Cr(VI)] on recycled waste porous glass (RWPG) from solid wastes sorting operations was carried-out. To the purpose metals containing solutions in the concentration range 2-4 mg/L, reproducing the average concentration present in, e.g., solid waste leachate from landfills or industrial effluents, were percolated onto columns loaded with RWPG beads with particle size in the range 0.35-1.0 mm, and flow-rates between 0.23 and 0.75 L/h. Metals retention mechanism was associated with ion exchange with overall capacities in the order: Pb+2 >Cd+2> Ni+2 >Cr(VI) in consideration of the hydrated ion radius and free energy of hydration of the metal ions. The rate controlling step was identified with the ions inter-diffusion in the Nernst liquid film around particles. The metals exhausted beads were embedded into cement conglomerates as inert materials thus minimizing metals release in the environment. The prepared mortar specimen showed improved thermal properties as compared to conventional (sand containing) composites.

Autore Pugliese

• Petrella Andrea , Petruzzelli Domenico

Tutti gli autori

• PETRELLA A , PETRELLA M , BOGHETICH G , BASILE T , PETRUZZELLI V , PETRUZZELLI D

Titolo volume/Rivista

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH

Anno di pubblicazione

2012

ISSN

0888-5885

ISBN

Non Disponibile

Numero di citazioni Wos

Nessuna citazione

Ultimo Aggiornamento Citazioni

Non Disponibile

Numero di citazioni Scopus

1

Ultimo Aggiornamento Citazioni

2017-04-23 03:20:56

Settori ERC

Non Disponibile

Codici ASJC

Non Disponibile