In order to better understand the processes that regulate the accumulation in the apoplasm of heavy metals and their mobilization by the plant metabolites it is essential to study the mechanisms that regulate the interactions between metal ions and pectins. In such a context, the sorption of Cd(II), Zn(II), Cu(II) and Pb(II) from single and multi-metal solution, by a Ca-polygalacturonate gel with a degree of esterification of 18.0 (PGAM1) and 65.5% (PGAM2) was studied in the 3.0 - 6.0 pH range in the presence of CaCl2 2.5 mM. The sorption of Cr(III) from single metal solution was also considered. The results show that the amount of each metal ion sorbed increases with increasing the initial metal ion concentration and pH. The data from the single metal solution tests show that at pH 6.0 the affinity of the metal ions towards the PGAM1 matrix follows the order: Cr(III) > Cu(II)  Pb(II) » Zn (II)  Cd(II). The simultaneous sorption of the bivalent metal ions by the PGAM1 gels indicate that Pb(II) is selectively sorbed. The FT-IR spectra show that the carboxylate groups are mainly responsible for the metal ion coordination. The ability of PGAM2 to accumulate Cr(III), Cu(II), and Pb(II) was lower than that found in the PGAM1 systems whereas the sorption of Zn(II) and Cd(II) was negligible.

Role of the Ca-pectates on the accumulation of heavy metals in the root apoplasm / Castaldi, Paola; Lauro, G; Senette, Caterina; Deiana, Salvatore Andrea. - In: PLANT PHYSIOLOGY AND BIOCHEMISTRY. - ISSN 0981-9428. - 48:12(2010), pp. 1008-1014. [10.1016/j.plaphy.2010.09.017]

Role of the Ca-pectates on the accumulation of heavy metals in the root apoplasm

CASTALDI, Paola
Writing – Original Draft Preparation
;
Lauro G
Formal Analysis
;
SENETTE, Caterina
Formal Analysis
;
DEIANA, Salvatore Andrea
Writing – Review & Editing
2010-01-01

Abstract

In order to better understand the processes that regulate the accumulation in the apoplasm of heavy metals and their mobilization by the plant metabolites it is essential to study the mechanisms that regulate the interactions between metal ions and pectins. In such a context, the sorption of Cd(II), Zn(II), Cu(II) and Pb(II) from single and multi-metal solution, by a Ca-polygalacturonate gel with a degree of esterification of 18.0 (PGAM1) and 65.5% (PGAM2) was studied in the 3.0 - 6.0 pH range in the presence of CaCl2 2.5 mM. The sorption of Cr(III) from single metal solution was also considered. The results show that the amount of each metal ion sorbed increases with increasing the initial metal ion concentration and pH. The data from the single metal solution tests show that at pH 6.0 the affinity of the metal ions towards the PGAM1 matrix follows the order: Cr(III) > Cu(II)  Pb(II) » Zn (II)  Cd(II). The simultaneous sorption of the bivalent metal ions by the PGAM1 gels indicate that Pb(II) is selectively sorbed. The FT-IR spectra show that the carboxylate groups are mainly responsible for the metal ion coordination. The ability of PGAM2 to accumulate Cr(III), Cu(II), and Pb(II) was lower than that found in the PGAM1 systems whereas the sorption of Zn(II) and Cd(II) was negligible.
2010
Role of the Ca-pectates on the accumulation of heavy metals in the root apoplasm / Castaldi, Paola; Lauro, G; Senette, Caterina; Deiana, Salvatore Andrea. - In: PLANT PHYSIOLOGY AND BIOCHEMISTRY. - ISSN 0981-9428. - 48:12(2010), pp. 1008-1014. [10.1016/j.plaphy.2010.09.017]
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/11388/60342
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 26
  • ???jsp.display-item.citation.isi??? 24
social impact