Abstract

Titanates may be selectively used as inorganic adsorbents for heavy metal ions owing to their stability andfast adsorption kinetics. Nevertheless, the synthesis of such materials usually requires extreme reactionconditions. In this work, a new titanium-based material was rapidly synthesized under mild laboratoryconditions. The obtained amorphous hydroxo titanate was tested for heavy metal sorption through kineticand equilibrium batch tests, which indicated that the new material had high adsorption rates andadsorption capacities towards Cu2+, Ni2+ and Pb2+ ions. Adsorption kinetics were pseudo-second order,and equilibrium data fitted the Langmuir isotherm model. The calculated maximum adsorption capacitiesof Cu2+, Ni2+ and Pb2+ in deionized water were around 1 mmol g-1, and they decreased for Cu2+ andNi2+ in the presence of Na+, Ca2+ and Mg2+ ions, whereas the alkali metal ions did not influence Pb2+uptake. The efficiency of adsorption and recovery of lead ions were evaluated through column dynamictests, by feeding the column with groundwater and tap water spiked with Pb2+. The high performance ofthe hydroxo titanate over several cycles of retention and elution suggested that the product is potentiallyuseful for the solid phase extraction of lead at trace levels in natural water samples, with potential use inmetal pre-concentration for analytical applications

Autore Pugliese

• Volpe Angela , Pastore Carlo

Tutti gli autori

• Volpe A.; Pagano M.; Pastore C.; Cuocci C.; Milella A.

Titolo volume/Rivista

Journal of Environmental Science and Health, Part A

Anno di pubblicazione

2016

ISSN

1093-4529

ISBN

Non Disponibile

Numero di citazioni Wos

Nessuna citazione

Ultimo Aggiornamento Citazioni

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Numero di citazioni Scopus

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Ultimo Aggiornamento Citazioni

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Settori ERC

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Codici ASJC

Non Disponibile