| Particle concentration effect in adsorption/desorption of Zn（Ⅱ） on anatase type nano TiO2 |
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| 作者姓名： | YANG Yu-huan CHEN Hao PAN Gang |
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| 作者单位： | YANG Yu-huan（State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China） ;
CHEN Hao（State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China） ;
PAN Gang（State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China） ; |
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| 摘 要： |
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| 关 键 词： | 锐钛矿 纳米二氧化钛 粒子浓缩效应 吸附作用 脱附作用 |
| 收稿时间： | 12 March 2007 |
| 修稿时间： | 17 May 2007 |
Particle concentration e ect in adsorption/desorption of Zn(II)
on anatase type nano TiO2 |
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| YANG Yu-huan,CHEN Hao,PAN Gang.Particle concentration e ect in adsorption/desorption of Zn(II)
on anatase type nano TiO2[J].Journal of Environmental Sciences,2007,19(12):1442-1445. |
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| Authors: | YANG Yu-huan CHEN Hao and PAN Gang |
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| Institution: | State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. |
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| Abstract: | Adsorption/desorption in a new Zn(II)-TiO2 adsorption system was investigated at different particle concentrations (Cp). TEM, SEM and XRD analyses revealed that the TiO2 particles were an aggregation of nano-sized (approximately 10 nm) pure anatase-type TiO2. Adsorption experiments were carried out with particle concentrations of 100, 400 and 1000 mg/L, and their adsorption isotherms were found to decline successively, showing an obvious Cp effect. Desorption experiments indicated that adsorption in this system was irreversible, and the irreversibility increased with increasing Cp. These phenomena could be explained by the MEA (metastable equilibrium adsorption) theory and the Cp effect could be modeled well with an MEA-Freundlich-type Cp effect isotherm equation. This study may help understand environmental behavior of contaminants on ultrafine natural particles. |
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| Keywords: | Zn(II) anatase-type TiO2 particle concentrations effect adsorption desorption adsorption isotherms concentration effect Particle desorption nano type study help environmental behavior ultrafine natural theory equation metastable equilibrium phenomena irreversibility increased increasing |
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