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Optimization of two-phase synthesis of Fe-hydrochar for arsenic removal from drinking water: Effect of temperature and Fe concentration.
Di Caprio, Fabrizio; Altimari, Pietro; Astolfi, Maria Luisa; Pagnanelli, Francesca.
Afiliación
  • Di Caprio F; Dipartimento di Chimica, Università Sapienza di Roma, Piazzale Aldo Moro 5, 00185, Rome, Italy. Electronic address: fabrizio.dicaprio@uniroma1.it.
  • Altimari P; Dipartimento di Chimica, Università Sapienza di Roma, Piazzale Aldo Moro 5, 00185, Rome, Italy.
  • Astolfi ML; Dipartimento di Chimica, Università Sapienza di Roma, Piazzale Aldo Moro 5, 00185, Rome, Italy; CIABC, Università Sapienza di Roma, Piazzale Aldo Moro 5, 00185, Rome, Italy.
  • Pagnanelli F; Dipartimento di Chimica, Università Sapienza di Roma, Piazzale Aldo Moro 5, 00185, Rome, Italy. Electronic address: francesca.pagnanelli@unirom1.it.
J Environ Manage ; 351: 119834, 2024 Feb.
Article en En | MEDLINE | ID: mdl-38128206
ABSTRACT
Arsenic-contaminated water is a global concern that demands the development of cost-effective treatments to ensure a safe drinking water supply for people worldwide. In this paper, we report the optimization of a two-phase synthesis for producing a hydrochar core from olive pomace to serve as support for the deposition of Fe-hydroxide, which is the active component in As(V) removal. The operating conditions considered were the initial concentration of Fe in solution in the hydrothermal treatment (phase I) and the temperature of Fe precipitation (phase II). The obtained samples were characterized for their elemental composition, solid yield, mineral content (Fe and K), phenol release, As(V) sorption capacity, and sorbent stability. Correlation analysis revealed that higher Fe concentrations (26.8 g/L) ensured better carbonization during hydrothermal treatment, increased arsenic removal, reduced concentrations of phenols in the final liquid, and improved stability of the sorbent composite. On the other hand, the temperature during Fe precipitation (phase II) can be maintained at lower levels (25-80 °C) since higher temperatures yielded lower adsorption capacity. Regression analysis demonstrated the significance of the main effects of the parameters on sorption capacity and provided a model for selecting operating conditions (Fe concentration and phase II temperature) to obtain composite sorbents with tailored sorption properties.
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Texto completo: 1 Colección: 01-internacional Banco de datos: MEDLINE Asunto principal: Arsénico / Contaminantes Químicos del Agua / Agua Potable / Purificación del Agua Límite: Humans Idioma: En Revista: J Environ Manage Año: 2024 Tipo del documento: Article

Texto completo: 1 Colección: 01-internacional Banco de datos: MEDLINE Asunto principal: Arsénico / Contaminantes Químicos del Agua / Agua Potable / Purificación del Agua Límite: Humans Idioma: En Revista: J Environ Manage Año: 2024 Tipo del documento: Article