This study aims to examine the feasibility of chemical, physical and biological processes on municipal landfills leachates, to mainly evaluate Nickel (Ni) and Chrome (Cr) removal. Flocculation/ coagulation methods were investigated on laboratory scale, by dosing ferric chloride (FeCl3) and aluminium polychloride to three leachates, at a natural pH of 8. The oxidation treatment with sodium permanganate (NaMnO4), applied on the leachate with higher metals content, defined an increment of Ni (from 9 to 50%) and Cr (from 31 to 80%) removals, compared with the previous chemical treatments. Further, the metals biosorption capacity on the biomass flocs was investigated in a pilot scale membrane bioreactor, previously tested on laboratory scale. The different percentages of added leachate showed efficiencies up to 93% for Cr and 58% for Ni, defining the different removal roles of the adsorption and of the membrane layer effect.

Processes comparison for nickel and chrome removal from urban landfill leachate

FATONE, Francesco;
2012

Abstract

This study aims to examine the feasibility of chemical, physical and biological processes on municipal landfills leachates, to mainly evaluate Nickel (Ni) and Chrome (Cr) removal. Flocculation/ coagulation methods were investigated on laboratory scale, by dosing ferric chloride (FeCl3) and aluminium polychloride to three leachates, at a natural pH of 8. The oxidation treatment with sodium permanganate (NaMnO4), applied on the leachate with higher metals content, defined an increment of Ni (from 9 to 50%) and Cr (from 31 to 80%) removals, compared with the previous chemical treatments. Further, the metals biosorption capacity on the biomass flocs was investigated in a pilot scale membrane bioreactor, previously tested on laboratory scale. The different percentages of added leachate showed efficiencies up to 93% for Cr and 58% for Ni, defining the different removal roles of the adsorption and of the membrane layer effect.
Landfill leachate, Nickel, Chrome, Coagulation–flocculation, Adsorption, MBR
File in questo prodotto:
Non ci sono file associati a questo prodotto.

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/11562/488152
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? ND
social impact