In this study we report on the interactions between the water-soluble fraction (WSF) of two municipal solid waste composts (C1- and C2-WSF) with Pb(II) and Cu(II) ions at pH 4.5. The Me(II) addition to the compost-WSFs led to the formation of soluble Me(II)-organic complexes (as highlighted by FT-IR spectroscopy), and to a decrease of the trace metals' solubility, which was greater for Pb(II) than Cu(II). This was due to the formation of insoluble Me(II) complexes involving the water-soluble organic carbon (WSOC) and the inorganic anions within both WSFs [1.10 and 0.62 mmol L-1 and 2.06 and 0.42 mmol L-1 of Pb(II) and Cu(II) precipitated from Cl- and C2-WSF respectively, when 6.4 mmol L-1 Me(II) was added]. A loss of WSOC from both WSFs, i.e. similar to 13% and < 5%, was detected in the systems containing 6.4 mmol L-1 Pb(II) and Cu(II) respectively. A significant contribution in the formation of Pb(II) precipitates was also due to phosphate, chloride and sulphate anions, since their concentrations in the WSF decreased of 80, 25 and 90%, respectively, after the addition of 6.4 mmol L-1 Pb(II). A decrease of phosphate anions in both WSFs (similar to 30%) was found in the systems containing Cu(II).

Interaction of the water soluble fraction of MSW-composts with Pb(II) and Cu(II) ions / Castaldi, Paola; Demurtas, Daniela; Silvetti, Margherita; Deiana, Salvatore Andrea; Garau, Giovanni. - In: JOURNAL OF ENVIRONMENTAL MANAGEMENT. - ISSN 0301-4797. - 192:(2017), pp. 39-47. [10.1016/j.jenvman.2017.01.032]

Interaction of the water soluble fraction of MSW-composts with Pb(II) and Cu(II) ions

CASTALDI, Paola
Writing – Original Draft Preparation
;
DEMURTAS, Daniela
Formal Analysis
;
SILVETTI, Margherita
Formal Analysis
;
DEIANA, Salvatore Andrea
Supervision
;
GARAU, Giovanni
Writing – Review & Editing
2017

Abstract

In this study we report on the interactions between the water-soluble fraction (WSF) of two municipal solid waste composts (C1- and C2-WSF) with Pb(II) and Cu(II) ions at pH 4.5. The Me(II) addition to the compost-WSFs led to the formation of soluble Me(II)-organic complexes (as highlighted by FT-IR spectroscopy), and to a decrease of the trace metals' solubility, which was greater for Pb(II) than Cu(II). This was due to the formation of insoluble Me(II) complexes involving the water-soluble organic carbon (WSOC) and the inorganic anions within both WSFs [1.10 and 0.62 mmol L-1 and 2.06 and 0.42 mmol L-1 of Pb(II) and Cu(II) precipitated from Cl- and C2-WSF respectively, when 6.4 mmol L-1 Me(II) was added]. A loss of WSOC from both WSFs, i.e. similar to 13% and < 5%, was detected in the systems containing 6.4 mmol L-1 Pb(II) and Cu(II) respectively. A significant contribution in the formation of Pb(II) precipitates was also due to phosphate, chloride and sulphate anions, since their concentrations in the WSF decreased of 80, 25 and 90%, respectively, after the addition of 6.4 mmol L-1 Pb(II). A decrease of phosphate anions in both WSFs (similar to 30%) was found in the systems containing Cu(II).
Interaction of the water soluble fraction of MSW-composts with Pb(II) and Cu(II) ions / Castaldi, Paola; Demurtas, Daniela; Silvetti, Margherita; Deiana, Salvatore Andrea; Garau, Giovanni. - In: JOURNAL OF ENVIRONMENTAL MANAGEMENT. - ISSN 0301-4797. - 192:(2017), pp. 39-47. [10.1016/j.jenvman.2017.01.032]
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/11388/175316
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 8
  • ???jsp.display-item.citation.isi??? 8
social impact