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- Title
Hydrothermal synthesis of CaTiO<sub>3</sub> cuboid-like nanoparticles starting from metatitanic acid and calcium hydroxide and their adsorption performance for Cd(II), Pb(II), Ni(II), and Co(II) cations.
- Authors
Qin Zhou; Aili Wang; Hengbo Yin
- Abstract
Calcium titanate (CaTiO3) cuboid-like nanoparticles with the average widths and lengths of 101–184 and 203–329 nm were hydrothermally synthesized using metatitanic acid and calcium hydroxide as starting materials at 120°C–180°C. Metatitanic acid is an intermediate in the commercial TiO2 pigment production by the sulfuric acid method. High hydrothermal temperature favored the formation of small-sized CaTiO3 cuboid-like nanoparticles. When the CaTiO3 cuboid-like nanoparticles were used as the absorbents for the removal of heavy metallic cations from aqueous solution, the Langmuir adsorption isotherms showed that the maximum adsorption capacities of the CaTiO3 cuboid-like nanoparticles for Pb(II), Cd(II), Ni(II), and Co(II) cations were 237.0, 74.7, 60.8 and 61.2 mg g–1, respectively. The thermodynamic analysis revealed that the adsorption process of these metallic cations was spontaneous and endothermic.
- Subjects
CALCIUM hydroxide; HYDROTHERMAL synthesis; ADSORPTION isotherms; LANGMUIR isotherms; ADSORPTION (Chemistry); ADSORPTION capacity
- Publication
Desalination & Water Treatment, 2020, Vol 185, p247
- ISSN
1944-3994
- Publication type
Article
- DOI
10.5004/dwt.2020.25426