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Fe3+/Mn2+ (Oxy)Hydroxide Nanoparticles Loaded onto Muscovite/Zeolite Composites (Powder, Pellets and Monoliths): Phosphate Carriers from Urban Wastewater to Soil.
Guaya, Diana; Maza, Luz; Angamarca, Adriana; Mendoza, Eda; García, Luis; Valderrama, César; Cortina, José Luis.
Afiliação
  • Guaya D; Department of Chemistry, Universidad Técnica Particular de Loja, Loja 100107, Ecuador.
  • Maza L; Department of Chemical Engineering, Polytechnic University of Catalonia-BarcelonaTech (UPC), 08019 Barcelona, Spain.
  • Angamarca A; Department of Chemistry, Universidad Técnica Particular de Loja, Loja 100107, Ecuador.
  • Mendoza E; Department of Chemistry, Universidad Técnica Particular de Loja, Loja 100107, Ecuador.
  • García L; Department of Chemistry, Universidad Técnica Particular de Loja, Loja 100107, Ecuador.
  • Valderrama C; Department of Chemistry, Universidad Técnica Particular de Loja, Loja 100107, Ecuador.
  • Cortina JL; Department of Chemical Engineering, Polytechnic University of Catalonia-BarcelonaTech (UPC), 08019 Barcelona, Spain.
Nanomaterials (Basel) ; 12(21)2022 Oct 31.
Article em En | MEDLINE | ID: mdl-36364624
The development of an efficient adsorbent is required in tertiary wastewater treatment stages to reduce the phosphate-phosphorous content within regulatory levels (1 mg L-1 total phosphorous). In this study, a natural muscovite was used for the preparation of muscovite/zeolite composites and the incorporation of Fe3+/Mn2+ (oxy)hydroxide nanoparticles for the recovery of phosphate from synthetic wastewater. The raw muscovite MC and the obtained muscovite/sodalite composite LMC were used in the powder form for the phosphate adsorption in batch mode. A muscovite/analcime composite was obtained in the pellets PLMCT3 and monolith SLMCT2 forms for the evaluation in fixed-bed mode for continuous operation. The effect of pH, equilibrium and kinetic parameters on phosphate adsorption and its further reuse in sorption-desorption cycles were determined. The characterization of the adsorbents determined the Fe3+ and Mn2+ incorporation into the muscovite/zeolite composite's structure followed the occupancy of the extra-framework octahedral and in the framework tetrahedral sites, precipitation and inner sphere complexation. The adsorbents used in this study (MC, LMC, PLMCT3 and SLMCT2) were effective for the phosphate recovery without pH adjustment requirements for real treated wastewater. Physical (e.g., electrostatic attraction) and chemical (complexation reactions) adsorption occurred between the protonated Fe3+/Mn2+ (oxy)hydroxy groups and phosphate anions. Higher ratios of adsorption capacities were obtained by powder materials (MC and LMC) than the pellets and monoliths forms (PLMCT3 and SLMCT2). The equilibrium adsorption of phosphate was reached within 30 min for powder forms (MC and LMC) and 150 min for pellets and monoliths forms (PLMCT3 and SLMCT2); because the phosphate adsorption was governed by the diffusion through the internal pores. The adsorbents used in this study can be applied for phosphate recovery from wastewater treatment plants in batch or fixed-bed mode with limited reusability. However, they have the edge of environmentally friendly final disposal being promissory materials for soil amendment applications.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Nanomaterials (Basel) Ano de publicação: 2022 Tipo de documento: Article País de afiliação: Equador País de publicação: Suíça

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Nanomaterials (Basel) Ano de publicação: 2022 Tipo de documento: Article País de afiliação: Equador País de publicação: Suíça