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首页> 外文期刊>The Science of the Total Environment >Removal of thallium(I) from aqueous solutions using titanate nanomaterials: The performance and the influence of morphology
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Removal of thallium(I) from aqueous solutions using titanate nanomaterials: The performance and the influence of morphology

机译：使用钛酸酯纳米材料从水溶液中去除al的性能和形貌影响

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摘要

Thallium (Tl) pollution has attracted environmental attention due to its high toxicity, thus the cleanup of Tl from the environment is of significance. Titanate nanomaterials (TNMs) with different morphologies can be synthesized via a hydrothermal reaction under different conditions but the knowledge of the T1(I) removal by them is limited. Our results indicated that TNM prepared at 130 ℃ exhibited a nanotubular appearance and a longer reaction time resulted in the formation of perfect nanotube, while that prepared at 180 ℃ exhibited a nanowire-like arrangement. The nanotubular and nanowire-like TNMs possessed approximately excellent Tl (I) adsorption capacities, wide pH, and temperature application ranges but different adsorption kinetics. Inorganic ions influenced the Tl(I) removal and the inhibiting effect of heavy metal ions followed the sequence Pb (II) > Cu(II) > Cd(II) > Zn(II). The anti-interference ability and selectivity of wire-like TNMs for T1(I) removal were higher than those of tubular TNMs. High Tl(l) uptakes of tubular and wire-like TNMs were driven by the electrostatic attraction, ion exchange with Na~+/H~+, and complexation with -ONa functional groups in the inter-layers and Ti-OH on the surfaces of TNMs as well as microprecipitation; while their adsorption configurations were different. TNMs are promising for potential applications in Tl(l) elimination from wastewater due to the high adsorption capacity and regenerability. This work indicates that TNMs synthesized under different conditions have the similar Tl(l) adsorption performances and the preparation of TNMs used for Tl(I) removal has an undemanding synthesis condition.
机译：hall（Tl）污染由于其高毒性而引起了环境关注，因此从环境中清除Tl具有重要意义。可以通过在不同条件下进行水热反应来合成具有不同形态的钛酸酯纳米材料（TNM），但是它们对T1（I）去除的知识是有限的。我们的结果表明，在130℃制备的TNM表现出纳米管外观，更长的反应时间导致形成完美的纳米管，而在180℃制备的TNM表现出纳米线状排列。纳米管和类似纳米线的TNM具有大约优异的Tl（I）吸附能力，较宽的pH和温度应用范围，但具有不同的吸附动力学。无机离子影响Tl（I）的去除，重金属离子的抑制作用依次为Pb（II）> Cu（II）> Cd（II）> Zn（II）。线状TNM去除T1（I）的抗干扰能力和选择性高于管状TNM。管状和线状TNM的高Tl（l）吸收是由静电吸引，与Na〜+ / H〜+进行离子交换以及与中间层中的-ONa官能团和表面的Ti-OH络合驱动的TNMs和微降水;但它们的吸附构型不同。由于高吸附能力和可再生性，TNM在废水中去除Tl（1）方面具有潜在的应用前景。这项工作表明，在不同条件下合成的TNM具有相似的Tl（l）吸附性能，用于去除Tl（I）的TNM的制备条件并不苛刻。

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