| Efficient removal of Co(Ⅱ) from aqueous solution by titanate sodium nanotubes |
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| 基金项目： | the Applied Basic Research Programs Funded Project of Sichuan Province(2012JY0100)，National Natural Science Foundation and China Academy of Engineering Physics joint fund(U1330125)，the National Fund of China for Fostering Talents in Basic Science(J1210004) |
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| 摘 要： | In this paper,a novel material for Co(Ⅱ)adsorption,titanate sodium nanotubes(Na_2Ti_2O_5-NTs)were synthesized and characterized,and then they were used to remove Co(Ⅱ) from aqueous solution and compared with titanic acid nanotubes(H_2Ti_2O_5-NTs) and potassium hexatitanate whiskers(K_2Ti_6O_(13)).The results showed that the adsorption of Co(Ⅱ) on the materials was dependent on p H values and was a spontaneous,endothermic process.Specifically,Na_2Ti_2O_5-NTs exhibited much more efficient ability to adsorb Co(Ⅱ) from aqueous solution,with the maximum adsorption capacity of 85.25 mg/g.Furthermore,Na_2Ti_2O_5-NTs could selectively adsorb Co(Ⅱ) from aqueous solution containing coexisting ions(Na~+,K~+,Mg~(2+),and Ca~(2+)).The results suggested that Na_2Ti_2O_5-NTs were potential effective adsorbents for removal of Co(Ⅱ) or cobalt-60 from wastewater.
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| 关 键 词： | Titanate sodium nanotubes Synthesis Co(II) Adsorption |
Efficient removal of Co(II) from aqueous solution by titanate sodium nanotubes |
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| Affiliation: | 1. Key Laboratory of Radiation Physics and Technology of Ministry of Education, Institute of Nuclear Science and Technology, Sichuan University, Chengdu 610064, China;2. Nuclear Power Institute of China, Chengdu 610041, China |
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| 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 aque-ous 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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| Keywords: | Titanate sodium nanotubes Synthesis Co(II) Adsorption |
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