Application of Pereskia aculeata Mill. leaves powder for removal of Cd(II) and Pb(II) from mono and bicomponent systems

• DOI: 10.22533/at.ed.3812303088

• Palavras-chave: -

• Keywords: raw material, wastewater treatment, biosorption, inorganic contaminants, cadmium, lead.

• Abstract:

  In the present study, Pereskia aculeata Mill. leaves were used to produce a biosorbent
  (OPN) to remove Cd(II) and Pb(II) from aqueous solutions. OPN was produced through a
  very simple and green process, and without chemical modification. OPN was characterized
  by FTIR spectroscopy, elemental C, H, and N analysis, scanning electron microscopy,
  determination of pH of point of zero charge, and the number of acid functions. Batch
  studies of the adsorption of Cd(II) and Pb(II) as a function of solution pH were performed
  in single and binary aqueous solutions. The optimum pH for the adsorption of both ions on
  OPN was 5.0 with adsorption capacities of 95 mg g -1 for Pb(II) and 27 mg g -1 for Cd(II).
  The reuse of OPN was evaluated and showed that 0.10 mol L -1 HNO 3 solution promotes
  almost complete desorption of both cations.