Abstract
In this paper, a novel material for Co(II) adsorption, titanate sodium nanotubes (Na2Ti2O5-NTs) were synthesized and characterized, and then they were used to remove Co(II) from aqueous solution and compared with titanic acid nanotubes (H2Ti2O5-NTs) and potassium hexatitanate whiskers (K2Ti6O13). The results showed that the adsorption of Co(II) on the materials was dependent on pH values and was a spontaneous, endothermic process. Specifically, Na2Ti2O5-NTs exhibited much more efficient ability to adsorb Co(II) from aqueous solution, with the maximum adsorption capacity of 85.25 mg/g. Furthermore, Na2Ti2O5-NTs could selectively adsorb Co(II) from aqueous solution containing coexisting ions (Na+, K+, Mg2+, and Ca2+). The results suggested that Na2Ti2O5-NTs were potential effective adsorbents for removal of Co(II) or cobalt-60 from wastewater.
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Some samples were measured by ICP-OES which was provided by the Institute of Chemistry, Sichuan University.
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This work was supported by the Applied Basic Research Programs Funded Project of Sichuan Province (No 2012JY0100), National Natural Science Foundation and China Academy of Engineering Physics joint fund (No U1330125) and the National Fund of China for Fostering Talents in Basic Science (J1210004).
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Li, DM., Li, FZ., Liao, JL. et al. Efficient removal of Co(II) from aqueous solution by titanate sodium nanotubes. NUCL SCI TECH 27, 143 (2016). https://doi.org/10.1007/s41365-016-0135-1
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DOI: https://doi.org/10.1007/s41365-016-0135-1