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Preparation of Synthetic Clays to Remove Phosphates and Ibuprofen in Water

Defense University Center at the Spanish Naval Academy, University of Vigo, Plaza de España 2, Marín, 36920 Pontevedra, Spain
Author to whom correspondence should be addressed.
Academic Editor: Jiangyong Hu
Water 2021, 13(17), 2394;
Received: 30 July 2021 / Revised: 27 August 2021 / Accepted: 28 August 2021 / Published: 30 August 2021
The main objective of this study consists in the synthesis of a layered double hydroxide (LDH) clay doped with magnesium and aluminum in order to test the removal of phosphates and ibuprofen in water. Two different LDH composites are assessed: oven-dried (LDHD) and calcined (LDHC). Single adsorptions of phosphate and ibuprofen showed up to 70% and 58% removal in water, when LDHC was used. A poorer performance was observed for LDHD, which presented adsorption efficiencies of 52% and 35%, respectively. The simultaneous removal of phosphate and ibuprofen in water showed that LDHC allows a greater reduction in the concentration of both compounds than LDHD. Phosphate adsorption showed a close agreement between the experimental and theoretical capacities predicted by the pseudo-second-order model, whereas ibuprofen fitted to a first-order model. In addition, phosphate adsorption showed a good fit to an intraparticle diffusion model and to Bangham model suggesting that diffusion into pores controls the adsorption process. No other mechanisms may be involved in ibuprofen adsorption, apart from intraparticle diffusion. Finally, phosphate desorption could recover up to 59% of the initial concentration, showing the feasibility of the recuperation of this compound in the LDH. View Full-Text
Keywords: eutrophication; hydrotalcite; adsorption; kinetics eutrophication; hydrotalcite; adsorption; kinetics
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MDPI and ACS Style

Devesa-Rey, R.; del Val, J.; Feijoo, J.; González-Coma, J.P.; Castiñeira, G.; González-Gil, L. Preparation of Synthetic Clays to Remove Phosphates and Ibuprofen in Water. Water 2021, 13, 2394.

AMA Style

Devesa-Rey R, del Val J, Feijoo J, González-Coma JP, Castiñeira G, González-Gil L. Preparation of Synthetic Clays to Remove Phosphates and Ibuprofen in Water. Water. 2021; 13(17):2394.

Chicago/Turabian Style

Devesa-Rey, Rosa, Jesús del Val, Jorge Feijoo, José P. González-Coma, Gonzalo Castiñeira, and Lorena González-Gil. 2021. "Preparation of Synthetic Clays to Remove Phosphates and Ibuprofen in Water" Water 13, no. 17: 2394.

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