Mechanism of heavy-metal removal by activated sludge

F. Pagnanelli, S. Mainelli, L. Bornoroni, D. Dionisi, L. Toro

Research output: Contribution to journalArticle

57 Citations (Scopus)

Abstract

This paper investigates the chemical mechanisms operating in cadmium and lead removal by activatedsludge in sequencing batch reactors. Selective extraction and acid digestion of sludge samples denoted that both Cd and Pb are mainly present as surface-bound metals. Characterisation of sludge samples by potentiometric titrations and IR spectra suggested that carboxylic and amino groups are the main active sites responsible for the binding properties of the biomass. Simulation of metal speciation implemented with complexation constants determined in biosorption tests, showed that cadmium predominates as biosorbed species, while lead was mainly removed by precipitation.
Original languageEnglish
Pages (from-to)1028-1034
Number of pages7
JournalChemosphere
Volume75
Issue number8
DOIs
Publication statusPublished - May 2009

Fingerprint

Heavy Metals
Cadmium
activated sludge
cadmium
Metals
sludge
heavy metal
acid digestion
Biosorption
metal
Batch reactors
Complexation
Titration
complexation
Biomass
Binding Sites
Acids
biomass
simulation
removal

Keywords

  • bisorption
  • heavy metals
  • activated sludge
  • potentiometric titration
  • metal speciation

Cite this

Pagnanelli, F., Mainelli, S., Bornoroni, L., Dionisi, D., & Toro, L. (2009). Mechanism of heavy-metal removal by activated sludge. Chemosphere, 75(8), 1028-1034. https://doi.org/10.1016/j.chemosphere.2009.01.043

Mechanism of heavy-metal removal by activated sludge. / Pagnanelli, F.; Mainelli, S.; Bornoroni, L. ; Dionisi, D.; Toro, L.

In: Chemosphere, Vol. 75, No. 8, 05.2009, p. 1028-1034.

Research output: Contribution to journalArticle

Pagnanelli, F, Mainelli, S, Bornoroni, L, Dionisi, D & Toro, L 2009, 'Mechanism of heavy-metal removal by activated sludge', Chemosphere, vol. 75, no. 8, pp. 1028-1034. https://doi.org/10.1016/j.chemosphere.2009.01.043
Pagnanelli, F. ; Mainelli, S. ; Bornoroni, L. ; Dionisi, D. ; Toro, L. / Mechanism of heavy-metal removal by activated sludge. In: Chemosphere. 2009 ; Vol. 75, No. 8. pp. 1028-1034.
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