| Title | Sorption properties of an amorphous hydroxo titanate towards Pb2+, Ni2+, and Cu2+ ions in aqueous solution |
| Abstract | Titanates may be selectively used as inorganic adsorbents for heavy metal ions owing to their stability and
fast adsorption kinetics. Nevertheless, the synthesis of such materials usually requires extreme reaction
conditions. In this work, a new titanium-based material was rapidly synthesized under mild laboratory
conditions. The obtained amorphous hydroxo titanate was tested for heavy metal sorption through kinetic
and equilibrium batch tests, which indicated that the new material had high adsorption rates and
adsorption 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 capacities
of Cu2+, Ni2+ and Pb2+ in deionized water were around 1 mmol g-1, and they decreased for Cu2+ and
Ni2+ 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 dynamic
tests, by feeding the column with groundwater and tap water spiked with Pb2+. The high performance of
the hydroxo titanate over several cycles of retention and elution suggested that the product is potentially
useful for the solid phase extraction of lead at trace levels in natural water samples, with potential use in
metal pre-concentration for analytical applications |
| Source | Journal of Environmental Science and Health, Part A 51 (13), pp. 1121–1130 |
| Keywords | heavy metalshydroxo titanateperoxymonosulfatepreconcentrationsorption |
| Journal | Journal of Environmental Science and Health, Part A |
| Editor | Taylor & Francis, , |
| Year | 2016 |
| Type | Articolo in rivista |
| DOI | 10.1080/10934529.2016.1199885 |
| Authors | Volpe, Angela; Pagano, Michele; Pastore, Carlo; Cuocci, Corrado; Milella, Antonella |
| Text | 359779 2016 10.1080/10934529.2016.1199885 Scopus 2 s2.0 84978468817 ISI Web of Science WOS WOS 000384441700005 heavy metals hydroxo titanate peroxymonosulfate preconcentration sorption Sorption properties of an amorphous hydroxo titanate towards Pb2 , Ni2 , and Cu2 ions in aqueous solution Volpe, Angela; Pagano, Michele; Pastore, Carlo; Cuocci, Corrado; Milella, Antonella Istituto di Ricerca Sulle Acque, Bari; Consiglio Nazionale delle Ricerche; Universita degli Studi di Bari Titanates may be selectively used as inorganic adsorbents for heavy metal ions owing to their stability and fast adsorption kinetics. Nevertheless, the synthesis of such materials usually requires extreme reaction conditions. In this work, a new titanium based material was rapidly synthesized under mild laboratory conditions. The obtained amorphous hydroxo titanate was tested for heavy metal sorption through kinetic and equilibrium batch tests, which indicated that the new material had high adsorption rates and adsorption 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 capacities of Cu2 , Ni2 and Pb2 in deionized water were around 1 mmol g 1, and they decreased for Cu2 and Ni2 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 dynamic tests, by feeding the column with groundwater and tap water spiked with Pb2 . The high performance of the hydroxo titanate over several cycles of retention and elution suggested that the product is potentially useful for the solid phase extraction of lead at trace levels in natural water samples, with potential use in metal pre concentration for analytical applications 51 Published version http //www.scopus.com/record/display.url eid=2 s2.0 84978468817 origin=inward J. Environ. Sci. Health A, 2016, 51 13 , 1121 1130 Published version J. Environ. Sci. Health A, 2016, 51 13 , 1121 1130.pdf Articolo in rivista Taylor Francis 1093 4529 Journal of Environmental Science and Health, Part A Journal of Environmental Science and Health, Part A angela.volpe VOLPE ANGELA corrado.cuocci CUOCCI CORRADO carlo.pastore PASTORE CARLO michele.pagano PAGANO MICHELE TA.P07.002.006 Trattamenti avanzati di ossidazione |
